PS BUSINESS PARKS INC/CA (Form: 10-Q, Received: 05/09/2013 16:09:58)

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 10-Q

x	Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the quarterly period ended March 31, 2013

¨	Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the transition period from to

Commission File Number 1-10709

PS BUSINESS PARKS, INC.

(Exact name of registrant as specified in its charter)

California

95-4300881

(State or Other Jurisdiction

of Incorporation)

(I.R.S. Employer

Identification Number)

701 Western Avenue, Glendale, California 91201-2397

(Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code: (818) 244-8080

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days. Yes x No ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes x No ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See definition of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ¨ No x

As of May 3, 2013, the number of shares of the registrant’s common stock, $0.01 par value per share, outstanding was 24,335,271.

PS BUSINESS PARKS, INC.

INDEX


	Page
PART I. FINANCIAL INFORMATION
Item 1. Financial Statements
Consolidated balance sheets as of March 31, 2013 (unaudited) and December 31, 2012		3
Consolidated statements of income (unaudited) for the three months ended March 31, 2013 and 2012		4
Consolidated statement of equity (unaudited) for the three months ended March 31, 2013		5
Consolidated statements of cash flows (unaudited) for the three months ended March 31, 2013 and 2012		6
Notes to consolidated financial statements (unaudited)		7
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations		20
Item 3. Quantitative and Qualitative Disclosures about Market Risk		33
Item 4. Controls and Procedures		34
PART II. OTHER INFORMATION
Item 1. Legal Proceedings		34
Item 1A. Risk Factors		34
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds		34
Item 6. Exhibits		35

PS BUSINESS PARKS, INC.

CONSOLIDATED BALANCE SHEETS

(In thousands, except share data)


	March 31,			December 31,
	2013			2012
	(Unaudited)
ASSETS
Cash and cash equivalents	$	8,056		$	12,883
Real estate facilities, at cost:
Land		787,425			793,352
Buildings and improvements		2,232,179			2,235,448

		3,019,604			3,028,800
Accumulated depreciation		(966,049	)		(942,639	)

		2,053,555			2,086,161
Land and building held for development		22,248			6,829

		2,075,803			2,092,990
Rent receivable		6,263			4,754
Deferred rent receivable		25,935			25,329
Other assets		10,634			15,861

Total assets	$	2,126,691		$	2,151,817

LIABILITIES AND EQUITY
Accrued and other liabilities	$	66,154		$	69,454
Term loan		90,000			200,000
Mortgage notes payable		250,000			268,102

Total liabilities		406,154			537,556
Commitments and contingencies
Equity:
PS Business Parks, Inc.’s shareholders’ equity:
Preferred stock, $0.01 par value, 50,000,000 shares authorized, 39,800 and 35,400 shares issued and outstanding at March 31, 2013 and December 31, 2012, respectively		995,000			885,000
Common stock, $0.01 par value, 100,000,000 shares authorized, 24,335,136 and 24,298,475 shares issued and outstanding at March 31, 2013 and December 31, 2012, respectively		242			242
Paid-in capital		536,545			537,091
Cumulative net income		990,206			967,783
Cumulative distributions		(968,973	)		(944,427	)

Total PS Business Parks, Inc.’s shareholders’ equity		1,553,020			1,445,689
Noncontrolling interests:
Common units		167,517			168,572

Total noncontrolling interests		167,517			168,572

Total equity		1,720,537			1,614,261

Total liabilities and equity	$	2,126,691		$	2,151,817

See accompanying notes.

PS BUSINESS PARKS, INC.

CONSOLIDATED STATEMENTS OF INCOME

(Unaudited, in thousands, except per share data)


	For the Three Months Ended March 31,
	2013			2012
Revenues:
Rental income	$	88,120		$	84,677
Facility management fees		158			166

Total operating revenues		88,278			84,843

Expenses:
Cost of operations		29,384			28,115
Depreciation and amortization		26,961			27,244
General and administrative		2,399			2,273

Total operating expenses		58,744			57,632

Other income and (expense):
Interest and other income		43			43
Interest and other expense		(4,588	)		(5,348	)

Total other income and (expense)		(4,545	)		(5,305	)

Income from continuing operations		24,989			21,906

Discontinued operations:
Loss from discontinued operations		—			(61	)

Total discontinued operations		—			(61	)

Net income	$	24,989		$	21,845

Net income allocation:
Net income allocable to noncontrolling interests:
Noncontrolling interests — common units	$	2,566		$	1,049
Noncontrolling interests — preferred units		—			99

Total net income allocable to noncontrolling interests		2,566			1,148

Net income allocable to PS Business Parks, Inc.:
Preferred shareholders		13,850			17,186
Restricted stock unit holders		33			44
Common shareholders		8,540			3,467

Total net income allocable to PS Business Parks, Inc.		22,423			20,697

Net income	$	24,989		$	21,845

Net income per common share — basic:
Continuing operations	$	0.35		$	0.15
Discontinued operations	$	—		$	—
Net income	$	0.35		$	0.14
Net income per common share — diluted:
Continuing operations	$	0.35		$	0.14
Discontinued operations	$	—		$	—
Net income	$	0.35		$	0.14
Weighted average common shares outstanding:
Basic		24,308			24,157

Diluted		24,411			24,241

See accompanying notes.

PS BUSINESS PARKS, INC.

CONSOLIDATED STATEMENT OF EQUITY

FOR THE THREE MONTHS ENDED MARCH 31, 2013

(Unaudited, in thousands, except share data)


	Preferred Stock				Common Stock				Paid-in			Cumulative		Cumulative			Total PS Business Parks, Inc.’s Shareholders’			Noncontrolling			Total
	Shares		Amount		Shares		Amount		Capital			Net Income		Distributions			Equity			Interests			Equity
Balances at December 31, 2012		35,400	$	885,000		24,298,475	$	242	$	537,091		$	967,783	$	(944,427	)	$	1,445,689		$	168,572		$	1,614,261
Issuance of preferred stock, net of issuance costs		4,400		110,000		—		—		(3,689	)		—		—			106,311			—			106,311
Exercise of stock options		—		—		31,000		—		1,594			—		—			1,594			—			1,594
Stock compensation, net		—		—		5,661		—		1,142			—		—			1,142			—			1,142
Net income		—		—		—		—		—			22,423		—			22,423			2,566			24,989
Distributions:
Preferred stock		—		—		—		—		—			—		(13,850	)		(13,850	)		—			(13,850	)
Common stock		—		—		—		—		—			—		(10,696	)		(10,696	)		—			(10,696	)
Noncontrolling interests		—		—		—		—		—			—		—			—			(3,214	)		(3,214	)
Adjustment to noncontrolling interests in underlying operating partnership		—		—		—		—		407			—		—			407			(407	)		—

Balances at March 31, 2013		39,800	$	995,000		24,335,136	$	242	$	536,545		$	990,206	$	(968,973	)	$	1,553,020		$	167,517		$	1,720,537

See accompanying notes.

PS BUSINESS PARKS, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited, in thousands)


	For the Three Months Ended March 31,
	2013			2012
Cash flows from operating activities:
Net income	$	24,989		$	21,845
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense		26,961			27,299
In-place lease adjustment		72			159
Tenant improvement reimbursements net of lease incentives		(277	)		(170	)
Stock compensation		1,423			1,266
Decrease in receivables and other assets		2,425			1,145
Increase (decrease) in accrued and other liabilities		(3,067	)		4,183

Total adjustments		27,537			33,882

Net cash provided by operating activities		52,526			55,727

Cash flows from investing activities:
Capital improvements to real estate facilities		(9,692	)		(11,053	)

Net cash used in investing activities		(9,692	)		(11,053	)

Cash flows from financing activities:
Borrowings on credit facility		—			124,000
Repayment of borrowings on credit facility		—			(203,000	)
Repayment of borrowings on term loan debt		(110,000	)		—
Principal payments on mortgage notes payable		(47	)		(210	)
Repayment of mortgage note payable		(18,055	)		—
Net proceeds from the issuance of preferred stock		106,311			222,688
Proceeds from the exercise of stock options		1,594			2,962
Redemption/repurchase of preferred stock		—			(164,150	)
Distributions paid to common shareholders		(10,696	)		(10,649	)
Distributions paid to preferred shareholders		(13,554	)		(11,926	)
Distributions paid to noncontrolling interests — common units		(3,214	)		(3,214	)
Distributions paid to noncontrolling interests — preferred units		—			(99	)

Net cash used in financing activities		(47,661	)		(43,598	)

Net (decrease) increase in cash and cash equivalents		(4,827	)		1,076
Cash and cash equivalents at the beginning of the period		12,883			4,980

Cash and cash equivalents at the end of the period	$	8,056		$	6,056

Supplemental schedule of non-cash investing and financing activities:
Adjustment to noncontrolling interests in underlying operating partnership:
Noncontrolling interests — common units	$	(407	)	$	(89	)
Paid-in capital	$	407		$	89
Accrued preferred stock distribution:
Accrued and other liabilities	$	296		$	—
Cumulative distributions	$	(296	)	$	—
Transfer to land and building held for development:
Land	$	(5,927	)	$	—
Buildings and improvements	$	(10,270	)	$	—
Accumulated depreciation	$	778		$	—
Land and building held for development	$	15,419		$	—
Issuance costs related to the redemption/repurchase of preferred equity:
Cumulative distributions	$	—		$	(5,260	)
Paid-in capital	$	—		$	5,260

See accompanying notes.

PS BUSINESS PARKS, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

MARCH 31, 2013

1. Organization and description of business

PS Business Parks, Inc. (“PSB”) was incorporated in the state of California in 1990. As of March 31, 2013, PSB owned 76.9% of the common partnership units of PS Business Parks, L.P. (the “Operating Partnership”). The remaining common partnership units are owned by Public Storage (“PS”). PSB, as the sole general partner of the Operating Partnership, has full, exclusive and complete responsibility and discretion in managing and controlling the Operating Partnership. PSB and the Operating Partnership are collectively referred to as the “Company.”

The Company is a fully-integrated, self-advised and self-managed real estate investment trust (“REIT”) that owns, operates, acquires and develops commercial properties, primarily multi-tenant flex, office and industrial space. As of March 31, 2013, the Company owned and operated 28.2 million rentable square feet of commercial space located in eight states. The Company also manages 1.2 million rentable square feet on behalf of PS.

References to the number of properties or square footage are unaudited and outside the scope of the Company’s independent registered public accounting firm’s review of the Company’s financial statements in accordance with the standards of the Public Company Accounting Oversight Board (United States).

2. Summary of significant accounting policies

Basis of presentation

The accompanying unaudited consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and with instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) necessary for a fair presentation have been included. Operating results for the three months ended March 31, 2013 are not necessarily indicative of the results that may be expected for the year ended December 31, 2013. For further information, refer to the consolidated financial statements and footnotes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2012.

The accompanying consolidated financial statements include the accounts of PSB and the Operating Partnership. All significant inter-company balances and transactions have been eliminated in the consolidated financial statements.

Noncontrolling Interests

The Company’s noncontrolling interests are reported as a component of equity separate from the parent’s equity. Purchases or sales of equity interests that do not result in a change in control are accounted for as equity transactions. In addition, net income attributable to the noncontrolling interest is included in consolidated net income on the face of the income statement and, upon a gain or loss of control, the interest purchased or sold, as well as any interest retained, is recorded at fair value with any gain or loss recognized in earnings.

Use of estimates

The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from these estimates.

Allowance for doubtful accounts

The Company monitors the collectability of its receivable balances including the deferred rent receivable on an ongoing basis. Based on these reviews, the Company maintains an allowance for doubtful accounts for estimated losses resulting from the possible inability of tenants to make contractual rent payments to the Company. A provision for doubtful accounts is recorded during each period. The allowance for doubtful accounts, which represents the cumulative allowances less write-offs of uncollectible rent, is netted against tenant and other receivables on the consolidated balance sheets. Tenant receivables are net of an allowance for uncollectible accounts totaling $400,000 at March 31, 2013 and December 31, 2012.

Financial instruments

The methods and assumptions used to estimate the fair value of financial instruments are described below. The Company has estimated the fair value of financial instruments using available market information and appropriate valuation methodologies. Considerable judgment is required in interpreting market data to develop estimates of market value. Accordingly, estimated fair values are not necessarily indicative of the amounts that could be realized in current market exchanges. The Company determines the estimated fair value of financial assets and liabilities utilizing a hierarchy of valuation techniques based on whether the inputs to a fair value measurement are considered to be observable or unobservable in a marketplace. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect market assumptions. This hierarchy requires the use of observable market data when available. The following is the fair value hierarchy:

•

Level 1 —quoted prices for identical instruments in active markets

•

Level 2 —quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which significant inputs and significant value drivers are observable in active markets; and

•

Level 3 —fair value measurements derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable

Financial assets that are exposed to credit risk consist primarily of cash and cash equivalents and receivables. The Company considers all highly liquid investments with a remaining maturity of three months or less at the date of purchase to be cash equivalents. Cash and cash equivalents, which consist primarily of money market investments, are only invested in entities with an investment grade rating. Receivables are comprised of balances due from a large number of customers. Balances that the Company expects to become uncollectible are reserved for or written off. Due to the short period to maturity of the Company’s cash and cash equivalents, accounts receivable, other assets and accrued and other liabilities, the carrying values as presented on the consolidated balance sheets are reasonable estimates of fair value.

Carrying values of the Company’s mortgage notes payable, unsecured credit facility and term loan are deemed to approximate fair value. The characteristics of these financial instruments, market data and other comparative metrics utilized in determining these fair values are “Level 2” inputs.

Real estate facilities

Real estate facilities are recorded at cost. Costs related to the renovation or improvement of the properties are capitalized. Expenditures for repairs and maintenance are expensed as incurred. Expenditures that are expected to benefit a period greater than two years and exceed $2,000 are capitalized and depreciated over their estimated useful life. Buildings and improvements are depreciated using the straight-line method over their estimated useful lives, which generally range from five to 30 years. Transaction costs, which include tenant improvements and lease commissions, in excess of $1,000 for leases with terms greater than one year are capitalized and depreciated over their estimated useful lives. Transaction costs less than $1,000 or leases of one year or less are expensed as incurred.

Land and building held for development

Property taxes, insurance and costs essential to the development of property for its intended use are capitalized during the period of development. Upon classification of an asset as held for development, depreciation of the asset is ceased.

Properties held for disposition

An asset is classified as an asset held for disposition when it meets certain requirements, which include, among other criteria, the approval of the sale of the asset, the marketing of the asset for sale and the expectation by the Company that the sale will likely occur within the next 12 months. Upon classification of an asset as held for disposition, depreciation of the asset is ceased, the operating results of the asset are included in discontinued operations for all periods presented and the net book value of the asset is included on the balance sheet as properties held for disposition.

Intangible assets/liabilities

Intangible assets and liabilities include above-market and below-market in-place lease values of acquired properties based on the present value (using an interest rate which reflects the risks associated with the leases acquired) of the difference between (i) the contractual amounts to be paid pursuant to the in-place leases and (ii) management’s estimate of fair market lease rates for the corresponding in-place leases, measured over a period equal to the remaining non-cancelable term of the lease. The capitalized above-market and below-market lease values (included in other assets and accrued liabilities in the accompanying consolidated balance sheets) are amortized to rental income over the remaining non-cancelable terms of the respective leases. The Company recorded net amortization of $72,000 and $159,000, which reduces rental income, of intangible assets and liabilities resulting from the above-market and below-market lease values during the three months ended March 31, 2013 and 2012, respectively. As of March 31, 2013, the value of in-place leases resulted in a net intangible asset of $4.6 million, net of $5.2 million of accumulated amortization with a weighted average amortization period of 6.7 years, and a net intangible liability of $4.2 million, net of $3.5 million of accumulated amortization with a weighted average amortization period of 5.2 years. As of December 31, 2012, the value of in-place leases resulted in a net intangible asset of $5.2 million, net of $4.7 million of accumulated amortization and a net intangible liability of $4.7 million, net of $3.0 million of accumulated amortization.

Evaluation of asset impairment

The Company evaluates its assets used in operations for impairment by identifying indicators of impairment and by comparing the sum of the estimated undiscounted future cash flows for each asset to the asset’s carrying value. When indicators of impairment are present and the sum of the estimated undiscounted future cash flows is less than the carrying value of such asset, an impairment loss is recorded equal to the difference between the asset’s current carrying value and its value based on discounting its estimated future cash flows. In addition, the Company evaluates its assets held for disposition for impairment. Assets held for disposition are reported at the lower of their carrying value or fair value, less cost of disposition. At March 31, 2013, the Company did not consider any assets to be impaired.

Stock compensation

All share-based payments to employees, including grants of employee stock options, are recognized as stock compensation in the Company’s income statement based on their grant date fair values. See Note 11.

Revenue and expense recognition

The Company must meet four basic criteria before revenue can be recognized: persuasive evidence of an arrangement exists; the delivery has occurred or services rendered; the fee is fixed or determinable; and collectability is reasonably assured. All leases are classified as operating leases. Rental income is recognized on a straight-line basis over the terms of the leases. Straight-line rent is recognized for all tenants with contractual fixed increases in rent that are not included on the Company’s credit watch list. Deferred rent receivable represents rental revenue recognized on a straight-line basis in excess of billed rents. Reimbursements from tenants for real estate taxes and other recoverable operating expenses are recognized as rental income in the period the applicable costs are incurred. Property management fees are recognized in the period earned.

Costs incurred in connection with leasing (primarily tenant improvements and lease commissions) are capitalized and amortized over the lease period.

Gains from sales of real estate facilities

The Company recognizes gains from sales of real estate facilities at the time of sale using the full accrual method, provided that various criteria related to the terms of the transactions and any subsequent involvement by the Company with the properties sold are met. If the criteria are not met, the Company defers the gains and recognizes them when the criteria are met or uses the installment or cost recovery methods as appropriate under the circumstances.

General and administrative expenses

General and administrative expenses include executive and other compensation, office expense, professional fees, acquisition transaction costs, state income taxes and other such administrative items.

Income taxes

The Company has qualified and intends to continue to qualify as a REIT, as defined in Section 856 of the Internal Revenue Code. As a REIT, the Company is not subject to federal income tax to the extent that it distributes its REIT taxable income to its shareholders. A REIT must distribute at least 90% of its taxable income each year. In addition, REITs are subject to a number of organizational and operating requirements. If the Company fails to qualify as a REIT in any taxable year, the Company will be subject to federal income tax (including any applicable alternative minimum tax) based on its taxable income using corporate income tax rates. Even if the Company qualifies for taxation as a REIT, the Company may be subject to certain state and local taxes on its income and property and to federal income and excise taxes on its undistributed taxable income. The Company believes it met all organization and operating requirements to maintain its REIT status during 2012 and intends to continue to meet such requirements for 2013. Accordingly, no provision for income taxes has been made in the accompanying consolidated financial statements.

The Company can recognize a tax benefit only if it is “more likely than not” that a particular tax position will be sustained upon examination or audit. To the extent that the “more likely than not” standard has been satisfied, the benefit associated with a position is measured as the largest amount that is greater than 50% likely of being recognized upon settlement. As of March 31, 2013, the Company did not recognize any tax benefit for uncertain tax positions.

Accounting for preferred equity issuance costs

The Company records issuance costs as a reduction to paid-in capital on its balance sheet at the time the preferred securities are issued and reflects the carrying value of the preferred equity at the stated value. The Company records issuance costs as non-cash preferred equity distributions at the time it notifies the holders of preferred stock or units of its intent to redeem such shares or units.

Net income allocation

Net income was allocated as follows (in thousands) :


	For the Three Months Ended March 31,
	2013		2012
Net income allocable to noncontrolling interests:
Noncontrolling interests — common units:
Continuing operations	$	2,566	$	1,063
Discontinued operations		—		(14	)

Total net income allocable to noncontrolling interests — common units		2,566		1,049

Noncontrolling interests — preferred units:
Distributions to preferred unit holders		—		99

Total net income allocable to noncontrolling interests — preferred units		—		99

Total net income allocable to noncontrolling interests		2,566		1,148

Net income allocable to PS Business Parks, Inc.:
Preferred shareholders:
Distributions to preferred shareholders		13,850		11,926
Issuance costs related to the redemption of preferred stock		—		5,260

Total net income allocable to preferred shareholders		13,850		17,186

Restricted stock unit holders:
Continuing operations		33		44

Total net income allocable to restricted stock unit holders		33		44

Common shareholders:
Continuing operations		8,540		3,514
Discontinued operations		—		(47	)

Total net income allocable to common shareholders		8,540		3,467

Total net income allocable to PS Business Parks, Inc.		22,423		20,697

Net income	$	24,989	$	21,845

Net income per common share

Per share amounts are computed using the number of weighted average common shares outstanding. “Diluted” weighted average common shares outstanding includes the dilutive effect of stock options and restricted stock units under the treasury stock method. “Basic” weighted average common shares outstanding excludes such effect. The Company’s restricted stock units are participating securities and are included in the computation of basic and diluted weighted average common shares outstanding. The Company’s restricted stock unit holders are paid non-forfeitable dividends in excess of the expense recorded which results in a reduction in net income allocable to common shareholders and unit holders. Earnings per share has been calculated as follows (in thousands, except per share amounts):


	For the Three Months Ended March 31,
	2013		2012
Net income allocable to common shareholders	$	8,540	$	3,467

Weighted average common shares outstanding:
Basic weighted average common shares outstanding		24,308		24,157
Net effect of dilutive stock compensation — based on treasury stock method using average market price		103		84

Diluted weighted average common shares outstanding		24,411		24,241

Net income per common share — Basic	$	0.35	$	0.14

Net income per common share — Diluted	$	0.35	$	0.14

Options to purchase 49,200 shares for the three months ended March 31, 2012 were not included in the computation of diluted net income per share because such options were considered anti-dilutive. No such options were excluded from the computation of diluted net income per share for the three months ended March 31, 2013.

Segment reporting

The Company views its operations as one segment.

Reclassifications

Certain reclassifications have been made to the consolidated financial statements for 2012 in order to conform to the 2013 presentation.

3. Real estate facilities

The activity in real estate facilities for the three months ended March 31, 2013 is as follows (in thousands) :


	Land			Buildings and Equipment			Accumulated Depreciation			Total
Balances at December 31, 2012	$	793,352		$	2,235,448		$	(942,639	)	$	2,086,161
Capital improvements, net		—			9,774			—			9,774
Disposals		—			(2,773	)		2,773			—
Depreciation expense		—			—			(26,961	)		(26,961	)
Transfer to land and building held for development		(5,927	)		(10,270	)		778			(15,419	)

Balances at March 31, 2013	$	787,425		$	2,232,179		$	(966,049	)	$	2,053,555

The purchase price of acquired properties is recorded to land, buildings and improvements and intangible assets and liabilities associated with in-place leases (including tenant improvements, unamortized lease commissions, value of above-market and below-market leases, acquired in-place lease values, and tenant relationships, if any) based on their respective estimated fair values. Acquisition-related costs are expensed as incurred.

In determining the fair value of the tangible assets of the acquired properties, management considers the value of the properties as if vacant as of the acquisition date. Management must make significant assumptions in determining the value of assets acquired and liabilities assumed. Using different assumptions in the recording of the purchase cost of the acquired properties would affect the timing of recognition of the related revenue and expenses. Amounts recorded to land are derived from comparable sales of land within the same region. Amounts recorded to buildings and improvements, tenant improvements and unamortized lease commissions are based on current market replacement costs and other market information. The amount recorded to acquired in-place leases is determined based on management’s assessment of current market conditions and the estimated lease-up periods for the respective spaces.

On December 19, 2012, the Company acquired three multi-tenant flex buildings in Austin, Texas, aggregating 226,000 square feet, for a purchase price of $14.9 million. In connection with this purchase, the Company received a $592,000 credit for committed tenant improvements and lease commissions. On July 24, 2012, the Company acquired a 958,000 square foot industrial park consisting of eight single-story buildings located in Kent Valley, Washington, for a purchase price of $37.6 million.

In October, 2012, the Company completed the sale of Quail Valley Business Park, a 66,000 square foot flex park in Houston, Texas, for a gross sales price of $2.3 million, resulting in a net gain of $935,000.

The following table summarizes the condensed results of operations of the property sold during 2012 for the three months ended March 31, 2012 (in thousands) :


Rental income	$	51
Cost of operations		(57	)
Depreciation		(55	)

Loss from discontinued operations	$	(61	)

In addition to minimum rental payments, tenants reimburse the Company for their pro rata share of specified operating expenses. No such amount was recorded for the three months ended March 31, 2012.

During the three months ended March 31, 2013, the Company reclassified a 125,000 square foot building located in Northern Virginia to land and building held for development as management intends to redevelop such at a future date. In conjunction with the reclassification, the Company ceased depreciation of the asset. The net book value of the asset was $15.4 million at March 31, 2013.

4. Leasing activity

The Company leases space in its real estate facilities to tenants primarily under non-cancelable leases generally ranging from one to 10 years. Future minimum rental revenues, excluding recovery of operating expenses under these leases, are as follows as of March 31, 2013 (in thousands) :


2013	$	188,460
2014		193,958
2015		135,218
2016		91,988
2017		60,271
Thereafter		95,085

Total	$	764,980

In addition to minimum rental payments, certain tenants reimburse the Company for their pro rata share of specified operating expenses. Such reimbursements amounted to $18.2 million and $17.1 million for the three months ended March 31, 2013 and 2012, respectively. These amounts are included as rental income in the accompanying consolidated statements of income.

Leases accounting for 5.5% of total leased square footage are subject to termination options which include leases accounting for 2.4% of total leased square footage having termination options exercisable through December 31, 2013. In general, these leases provide for termination payments should the termination options be exercised. The future minimum rental revenues in the above table assume such options are not exercised.

5. Bank loans

The Company has a line of credit (the “Credit Facility”) with Wells Fargo Bank, National Association (“Wells Fargo”) which matures on August 1, 2015. The Credit Facility has a borrowing limit of $250.0 million. The rate of interest charged on borrowings is equal to a rate ranging from the London Interbank Offered Rate (“LIBOR”) plus 1.00% to LIBOR plus 1.85% depending on the Company’s credit ratings. Currently, the Company’s rate under the Credit Facility is LIBOR plus 1.10%. In addition, the Company is required to pay an annual facility fee ranging from 0.15% to 0.45% of the borrowing limit depending on the Company’s credit ratings (currently 0.15%). The Company had no balance outstanding on the Credit Facility at March 31, 2013 and December 31, 2012. The Company had $715,000 and $791,000 of unamortized commitment fees as of March 31, 2013 and December 31, 2012, respectively. The Credit Facility requires the Company to meet certain covenants, with which the Company was in compliance at March 31, 2013. Interest on outstanding borrowings is payable monthly. The maturity date of the Credit Facility can be extended by one year at the Company’s election.

The Company has a term loan with Wells Fargo, as Administrative Agent (the “Term Loan”). Pursuant to the Term Loan, the Company borrowed $250.0 million for a three year term maturing December 31, 2014. The maturity date of the Term Loan Agreement can be extended by one year at the Company’s election. Interest on the amounts borrowed under the Term Loan accrues based on an applicable rate ranging from LIBOR plus 1.15% to LIBOR plus 2.25% depending on the Company’s credit ratings. Currently, the Company’s rate under the Term Loan is LIBOR plus 1.20%. The Company had $90.0 million outstanding on the Term Loan at an interest rate of 1.41% at March 31, 2013 and $200.0 million outstanding at an interest rate of 1.41% at December 31, 2012. The Company had $150,000 and $383,000 of unamortized commitment fees as of March 31, 2013 and December 31, 2012, respectively. During the three months ended March 31, 2013, the Company reduced the balance on the Term Loan by $110.0 million and accordingly recorded accelerated amortization of commitment fees of $183,000. The covenants and events of default contained in the Credit Facility are incorporated into the Term Loan by reference, and the Term Loan is cross-defaulted to the Credit Facility. The Term Loan can be repaid in full or part at any time prior to its maturity without penalty.

6. Mortgage notes payable

Mortgage notes payable consist of the following (in thousands) :


	March 31, 2013		December 31, 2012
5.45% mortgage note, secured by 4.8 million square feet of commercial properties with a net book value of $445.1 million, interest payable monthly, due December, 2016	$	250,000	$	250,000
5.52% mortgage note, repaid January, 2013		—		9,036
5.68% mortgage note, repaid January, 2013		—		9,066

Total	$	250,000	$	268,102

The 5.45% mortgage note of $250.0 million is payable in full December, 2016.

In January, 2013, the Company repaid two mortgage notes payable totaling $18.1 million with a combined stated interest rate of 5.60%. In November, 2012, the Company repaid $13.2 million on a mortgage note with a stated interest rate of 5.73%.

7. Noncontrolling interests

As described in Note 2, the Company reports noncontrolling interests within equity in the consolidated financial statements, but separate from the Company’s shareholders’ equity. In addition, net income allocable to noncontrolling interests is shown as a reduction from net income in calculating net income allocable to common shareholders.

Common partnership units

The Company presents the accounts of PSB and the Operating Partnership on a consolidated basis. Ownership interests in the Operating Partnership that can be redeemed for common stock, other than PSB’s interest, are classified as noncontrolling interests — common units in the consolidated financial statements. Net income allocable to noncontrolling interests — common units consists of the common units’ share of the consolidated operating results after allocation to preferred units and shares. Beginning one year from the date of admission as a limited partner (common units) and subject to certain limitations described below, each limited partner other than PSB has the right to require the redemption of its partnership interest.

A limited partner (common units) that exercises its redemption right will receive cash from the Operating Partnership in an amount equal to the market value (as defined in the Operating Partnership Agreement) of the partnership interests redeemed. In lieu of the Operating Partnership redeeming the common units for cash, PSB, as general partner, has the right to elect to acquire the partnership interest directly from a limited partner exercising its redemption right, in exchange for cash in the amount specified above or by issuance of one share of PSB common stock for each unit of limited partnership interest redeemed.

A limited partner (common units) cannot exercise its redemption right if delivery of shares of PSB common stock would be prohibited under the applicable articles of incorporation, or if the general partner believes that there is a risk that delivery of shares of common stock would cause the general partner to no longer qualify as a REIT, would cause a violation of the applicable securities laws, or would result in the Operating Partnership no longer being treated as a partnership for federal income tax purposes.

At March 31, 2013, there were 7,305,355 common units owned by PS, which are accounted for as noncontrolling interests. On a fully converted basis, assuming all 7,305,355 noncontrolling interests — common units were converted into shares of common stock of PSB at March 31, 2013, the noncontrolling interests — common units would convert into 23.1% of the shares of common stock then outstanding. Combined with PS’s existing common stock ownership, on a fully converted basis, PS has a combined ownership of 41.4% of the Company’s common equity. At the end of each reporting period, the Company determines the amount of equity (book value of net assets) which is allocable to the noncontrolling interest based upon the ownership interest, and an adjustment is made to the noncontrolling interest, with a corresponding adjustment to paid-in capital, to reflect the noncontrolling interests’ equity interest in the Company.

Preferred partnership units

Through the Operating Partnership, the Company had no preferred units outstanding as of March 31, 2013 and December 31, 2012.

On June 8, 2012, the Company redeemed 223,300 units of its 7.125% Series N Cumulative Redeemable Preferred Units for $5.6 million. The Company reported the excess of the redemption amount over the carrying amount of $149,000, equal to the original issuance costs, as a reduction of net income allocable to common shareholders and unit holders for the three months ended June 30, 2012.

8. Related party transactions

The Operating Partnership manages industrial, office and retail facilities for PS. These facilities, all located in the United States, operate under the “Public Storage” or “PS Business Parks” names. The PS Business Parks name and logo is owned by PS and licensed to the Company under a non-exclusive, royalty-free license agreement. The license can be terminated by either party for any reason with six months written notice.

Under the property management contract with PS, the Operating Partnership is compensated based on a percentage of the gross revenues of the facilities managed. Under the supervision of the property owners, the Operating Partnership coordinates rental policies, rent collections, marketing activities, the purchase of equipment and supplies, maintenance activities, and the selection and engagement of vendors, suppliers and independent contractors. In addition, the Operating Partnership assists and advises the property owners in establishing policies for the hire, discharge and supervision of employees for the operation of these facilities, including property managers and leasing, billing and maintenance personnel.

The property management contract with PS is for a seven-year term with the agreement automatically extending for an additional one-year period upon each one-year anniversary of its commencement (unless cancelled by either party). Either party can give notice of its intent to cancel the agreement upon expiration of its current term. Management fee revenues under this contract were $158,000 and $166,000 for the three months ended March 31, 2013 and 2012, respectively.

PS also provides property management services for the self-storage component of two assets owned by the Company. These self-storage facilities, located in Palm Beach County, Florida, operate under the “Public Storage” name.

Under the property management contract, PS is compensated based on a percentage of the gross revenues of the facilities managed. Under the supervision of the Company, PS coordinates rental policies, rent collections, marketing activities, the purchase of equipment and supplies, maintenance activities, and the selection and engagement of vendors, suppliers and independent contractors. In addition, PS is responsible in establishing the policies for the hire, discharge and supervision of employees for the operation of these facilities, including on-site managers, assistant managers and associate managers.

Either the Company or PS can cancel the property management contract upon 60 days’ notice. Management fee expenses under the contract were $14,000 and $13,000 for the three months ended March 31, 2013 and 2012, respectively.

Pursuant to a cost sharing and administrative services agreement, the Company shares costs with PS for certain administrative services, which are allocated to PS in accordance with a methodology intended to fairly allocate those costs. These costs totaled $108,000 and $110,000 for the three months ended March 31, 2013 and 2012, respectively.

The Company had amounts due to PS of $492,000 at March 31, 2013 and due from PS of $243,000 at December 31, 2012 for these contracts, as well as for certain operating expenses paid by the Company on behalf of PS.

9. Shareholders’ equity

Preferred stock

As of March 31, 2013 and December 31, 2012, the Company had the following series of preferred stock outstanding:


						March 31, 2013				December 31, 2012
Series	Issuance Date	Earliest Potential Redemption Date	Dividend Rate			Shares Outstanding		Amount (in thousands)		Shares Outstanding		Amount (in thousands)
Series R	October, 2010	October, 2015		6.875	%		3,000	$	75,000		3,000	$	75,000
Series S	January, 2012	January, 2017		6.450	%		9,200		230,000		9,200		230,000
Series T	May, 2012	May, 2017		6.000	%		14,000		350,000		14,000		350,000
Series U	September, 2012	September, 2017		5.750	%		9,200		230,000		9,200		230,000
Series V	March, 2013	March, 2018		5.700	%		4,400		110,000		—		—

Total							39,800	$	995,000		35,400	$	885,000

On March 14, 2013, the Company issued $110.0 million or 4.4 million depositary shares, each representing 1/1,000 of a share of the 5.70% Cumulative Preferred Stock, Series V, at $25.00 per depositary share.

On October 9, 2012, the Company completed the redemption of its 6.70% Cumulative Preferred Stock, Series P, at its par value of $132.3 million. The Company reported the excess of the redemption amount over the carrying amount of $3.8 million, equal to the original issuance costs, as a reduction of net income allocable to common shareholders and unit holders for the three months ended December 31, 2012.

On September 14, 2012, the Company issued $230.0 million or 9.2 million depositary shares, each representing 1/1,000 of a share of the 5.75% Cumulative Preferred Stock, Series U, at $25.00 per depositary share.

On June 15, 2012, the Company completed the redemption of its 7.00% Cumulative Preferred Stock, Series H, at its par value of $158.5 million and its 6.875% Cumulative Preferred Stock, Series I, at its par value of $68.6 million. The Company reported the excess of the redemption amount over the carrying amount of $8.1 million, equal to the original issuance costs, as a reduction of net income allocable to common shareholders and unit holders for the three months ended June 30, 2012.

On May 14, 2012, the Company issued $350.0 million or 14.0 million depositary shares, each representing 1/1,000 of a share of the 6.00% Cumulative Preferred Stock, Series T, at $25.00 per depositary share.

During February, 2012, the Company completed the redemption of its 7.20% Cumulative Preferred Stock, Series M, at its par value of $79.6 million and its 7.375% Cumulative Preferred Stock, Series O, at its par value of $84.6 million. The Company reported the excess of the redemption amount over the carrying amount of $5.3 million, equal to the original issuance costs, as a reduction of net income allocable to common shareholders and unit holders for the three months ended March 31, 2012.

On January 18, 2012, the Company issued $230.0 million or 9.2 million depositary shares, each representing 1/1,000 of a share of the 6.45% Cumulative Preferred Stock, Series S, at $25.00 per depositary share.

The Company recorded $13.9 million and $11.9 million in distributions to its preferred shareholders for the three months ended March 31, 2013 and 2012, respectively.

Holders of the Company’s preferred stock will not be entitled to vote on most matters, except under certain conditions. In the event of a cumulative arrearage equal to six quarterly dividends, the holders of the preferred stock will have the right to elect two additional members to serve on the Company’s Board of Directors until all events of default have been cured. At March 31, 2013, there were no dividends in arrears.

Except under certain conditions relating to the Company’s qualification as a REIT, the preferred stock is not redeemable prior to the previously noted redemption dates. On or after the respective redemption dates, the respective series of preferred stock will be redeemable, at the option of the Company, in whole or in part, at $25.00 per depositary share, plus any accrued and unpaid dividends. As of March 31, 2013, the Company had $31.8 million of deferred costs in connection with the issuance of preferred stock, which the Company will report as additional non-cash distributions upon notice of its intent to redeem such shares.

Common stock

The Company’s Board of Directors previously authorized the repurchase, from time to time, of up to 6.5 million shares of the Company’s common stock on the open market or in privately negotiated transactions. Since inception of the program, the Company has repurchased an aggregate of 4.9 million shares of common stock at an aggregate cost of $183.9 million or an average cost per share of $37.64. Under existing board authorizations, the Company can repurchase an additional 1.6 million shares. No shares of common stock were repurchased under this program during the three months ended March 31, 2013 and 2012.

The Company paid $10.7 million ($0.44 per common share) and $10.6 million ($0.44 per common share) in distributions to its common shareholders for the three months ended March 31, 2013 and 2012, respectively.

Equity stock

In addition to common and preferred stock, the Company is authorized to issue 100.0 million shares of Equity Stock. The Articles of Incorporation provide that the Equity Stock may be issued from time to time in one or more series and give the Board of Directors broad authority to fix the dividend and distribution rights, conversion and voting rights, redemption provisions and liquidation rights of each series of Equity Stock.

10. Commitments and contingencies

The Company currently is neither subject to any other material litigation nor, to management’s knowledge, is any material litigation currently threatened against the Company other than routine litigation and administrative proceedings arising in the ordinary course of business.

11. Stock compensation

PSB has a 2003 Stock Option and Incentive Plan (the “2003 Plan”) covering 1.5 million shares of PSB’s common stock. PSB has a 2012 Equity and Performance-Based Incentive Compensation Plan (the “2012 Plan”) covering 1.0 million shares of PSB’s common stock. Under the 2003 Plan and 2012 Plan, PSB has granted non-qualified options to certain directors, officers and key employees to purchase shares of PSB’s common stock at a price not less than the fair market value of the common stock at the date of grant. Additionally, under the 2003 Plan and 2012 Plan, PSB has granted restricted shares of common stock to certain directors and restricted stock units to officers and key employees.

The weighted average grant date fair value of options granted during the three months ended March 31, 2012 was $4.89 per share. The Company has calculated the fair value of each option grant on the date of grant using the Black-Scholes option-pricing model with the following weighted average assumptions used for grants during the three months ended March 31, 2012: a dividend yield of 2.7%; expected volatility of 13.8%; expected life of five years; and risk-free interest rates of 0.9%. No options were granted during the three months ended March 31, 2013.

The weighted average grant date fair value of restricted stock units granted during the three months ended March 31, 2012 was $64.10. The Company calculated the fair value of each restricted stock unit grant using the market value on the date of grant. No restricted stock units were granted during the three months ended March 31, 2013.

At March 31, 2013, there were a combined total of 976,000 options and restricted stock units authorized to grant. Information with respect to outstanding options and nonvested restricted stock units granted under the 2003 Plan and 2012 Plan is as follows:


Options:	Number of Options			Weighted Average Exercise Price		Weighted Average Remaining Contract Life		Aggregate Intrinsic Value (in thousands)
Outstanding at December 31, 2012		454,573		$	53.41
Granted		—		$	—
Exercised		(31,000	)	$	51.42
Forfeited		—		$	—

Outstanding at March 31, 2013		423,573		$	53.56		5.68 Years	$	10,742

Exercisable at March 31, 2013		257,173		$	51.91		5.06 Years	$	6,947


Restricted Stock Units:	Number of Units			Weighted Average Grant Date Fair Value
Nonvested at December 31, 2012		53,090		$	55.69
Granted		—		$	—
Vested		(8,910	)	$	53.09
Forfeited		(760	)	$	38.99

Nonvested at March 31, 2013		43,420		$	56.51

Effective January 1, 2012, the Company entered into a performance-based restricted stock unit program, the Senior Management Long-Term Equity Incentive Program for 2012-2015 (“LTEIP”), with selected employees of the Company. Under the LTEIP, the Company established a targeted restricted stock unit award for selected employees, which would be earned only if the Company achieved defined targets during 2012 to 2015. The first type of award is an annual award following the end of each of the four years in the program, with the award subject to and based on the achievement of defined targets during the previous year. The second type of award is an award based on achieving defined targets during the cumulative four-year period 2012-2015. In the event the defined target is not achieved for an annual award, the shares allocated for award for such year are added to the shares that may be received if the four-year target is achieved. Both types of restricted stock unit awards vest in three equal annual installments beginning one year from the date of award. Up to approximately 38,449 restricted stock units would be granted for each of the four years assuming achievement was met and up to approximately 312,220 restricted stock units would be granted for the cumulative four-year period assuming achievement was met. Net compensation expense of $1.0 million and $772,000 related to the LTEIP was recognized during the three months ended March 31, 2013 and 2012, respectively.

Included in the Company’s consolidated statements of income for the three months ended March 31, 2013 and 2012, was $115,000 and $129,000, respectively, in net compensation expense related to stock options. Net compensation expense of $1.2 million (includes $1.0 million from the LTEIP) and $1.1 million (includes $772,000 from the LTEIP) related to restricted stock units was recognized during the three months ended March 31, 2013 and 2012, respectively.

As of March 31, 2013, there was $864,000 of unamortized compensation expense related to stock options expected to be recognized over a weighted average period of 2.4 years. As of March 31, 2013, there was $23.1 million (includes $21.2 million from the LTEIP) of unamortized compensation expense related to restricted stock units expected to be recognized over a weighted average period of 5.5 years.

Cash received from 31,000 stock options exercised during the three months ended March 31, 2013 was $1.6 million. Cash received from 81,716 stock options exercised during the three months ended March 31, 2012 was $3.0 million. The aggregate intrinsic value of the stock options exercised during the three months ended March 31, 2013 and 2012 was $735,000 and $2.2 million, respectively.

During the three months ended March 31, 2013, 8,910 restricted stock units vested; in settlement of these units, 5,661 shares were issued, net of shares applied to payroll taxes. The aggregate fair value of the shares vested for the three months ended March 31, 2013 was $679,000. During the three months ended March 31, 2012, 14,874 restricted stock units vested; in settlement of these units, 10,001 shares were issued, net of shares applied to payroll taxes. The aggregate fair value of the shares vested for the three months ended March 31, 2012 was $953,000.

In May of 2004, the shareholders of the Company approved the issuance of up to 70,000 shares of common stock under the Retirement Plan for Non-Employee Directors (the “Director Plan”). Under the Director Plan, the Company grants 1,000 shares of common stock for each year served as a director up to a maximum of 5,000 shares issued upon retirement. In December of 2011, the Director Plan was amended to increase the maximum shares from 5,000 shares to 7,000 shares, 1,000 shares of common stock for each year served as a director. The Company recognizes compensation expense with regards to grants to be issued in the future under the Director Plan. As a result, included in the Company’s consolidated statements of income was $67,000 and $85,000 in compensation expense for the three months ended March 31, 2013 and 2012, respectively. As of March 31, 2013 and 2012, there was $1.1 million and $1.4 million, respectively, of unamortized compensation expense related to these shares. No shares were issued during the three months ended March 31, 2013 and 2012.

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Forward-Looking Statements: Forward-looking statements are made throughout this Quarterly Report on Form 10-Q. For this purpose, any statements contained herein that are not statements of historical fact may be deemed to be forward-looking statements. Without limiting the foregoing, the words “may,” “believes,” “anticipates,” “plans,” “expects,” “seeks,” “estimates,” “intends,” and similar expressions are intended to identify forward-looking statements. There are a number of important factors that could cause the results of the Company to differ materially from those indicated by such forward-looking statements, including but not limited to: (a) changes in general economic and business conditions; (b) decreases in rental rates or increases in vacancy rates/failure to renew or replace expiring leases; (c) tenant defaults; (d) the effect of the recent credit and financial market conditions; (e) our failure to maintain our status as a real estate investment trust (“REIT”); (f) the economic health of our tenants; (g) increases in operating costs; (h) casualties to our properties not covered by insurance; (i) the availability and cost of capital; (j) increases in interest rates and its effect on our stock price; (k) other factors discussed under the heading “Part I, Item 1A. Risk Factors” in our annual report on Form 10-K for the year ended December 31, 2012. In light of the significant uncertainties inherent in the forward-looking statements included herein, the inclusion of such information should not be regarded as a representation by us or any other person that our objectives and plans will be achieved. Moreover, we assume no obligation to update these forward-looking statements to reflect actual results, changes in assumptions or changes in other factors affecting such forward-looking statements, except as required by law.

Overview

As of March 31, 2013, the Company owned and operated 28.2 million rentable square feet of multi-tenant flex, office and industrial properties located in eight states.

The Company focuses on increasing profitability and cash flow aimed at maximizing shareholder value. The Company strives to maintain high occupancy levels while increasing rental rates when market conditions allow, although the Company may decrease rental rates in markets where conditions require. The Company also acquires properties it believes will create long-term value, and from time to time disposes of properties which no longer fit within the Company’s strategic objectives. Operating results are driven primarily by income from rental operations and are therefore substantially influenced by rental demand for space within our properties and our markets, which impacts occupancy and rental rates.

During the first three months of 2013, the Company executed leases comprising 1.8 million square feet of space including 940,000 square feet of renewals of existing leases and 828,000 square feet of new leases. Overall, the Company experienced a decrease in rental rates when comparing new rental rates to outgoing rental rates of 3.4%. See further discussion of operating results below.

Critical Accounting Policies and Estimates:

Our accounting policies are described in Note 2 to the consolidated financial statements included in this Form 10-Q. We believe our most critical accounting policies relate to revenue recognition, property acquisitions, allowance for doubtful accounts, impairment of long-lived assets, depreciation, accruals of operating expenses and accruals for contingencies, each of which we discuss below.

Revenue Recognition: The Company must meet four basic criteria before revenue can be recognized: persuasive evidence of an arrangement exists; the delivery has occurred or services rendered; the fee is fixed or determinable; and collectability is reasonably assured. All leases are classified as operating leases. Rental income is recognized on a straight-line basis over the terms of the leases. Straight-line rent is recognized for all tenants with contractual fixed increases in rent that are not included on the Company’s credit watch list. Deferred rent receivable represents rental revenue recognized on a straight-line basis in excess of billed rents. Reimbursements from tenants for real estate taxes and other recoverable operating expenses are recognized as rental income in the period the applicable costs are incurred. Property management fees are recognized in the period earned.

Property Acquisitions: The Company records the purchase price of acquired properties to land, buildings and improvements and intangible assets and liabilities associated with in-place leases (including tenant improvements, unamortized lease commissions, value of above-market and below-market leases, acquired in-place lease values, and tenant relationships, if any) based on their respective estimated fair values. Acquisition related costs are expensed as incurred.

The value recorded to the above-market or below-market in-place lease values of acquired properties is determined based upon the present value (using a discount rate which reflects the risks associated with the acquired leases) of the difference between (i) the contractual rents to be paid pursuant to the in-place leases, and (ii) management’s estimate of fair market lease rates for the corresponding in-place leases, measured over a period equal to the remaining non-cancelable term of the lease. The amounts recorded to above-market or below-market leases are included in other assets or other liabilities in the accompanying consolidated balance sheets and are amortized on a straight-line basis as an increase or reduction of rental income over the remaining non-cancelable term of the respective leases.

Allowance for Doubtful Accounts: Rental revenue from our tenants is our principal source of revenue. We monitor the collectability of our receivable balances including the deferred rent receivable on an ongoing basis. Based on these reviews, we maintain an allowance for doubtful accounts for estimated losses resulting from the possible inability of our tenants to make required rent payments to us. Tenant receivables and deferred rent receivables are carried net of the allowances for uncollectible tenant receivables and deferred rent. As discussed below, determination of the adequacy of these allowances requires significant judgments and estimates. Our estimate of the required allowance is subject to revision as the factors discussed below change and is sensitive to the effect of economic and market conditions on our tenants.

Tenant receivables consist primarily of amounts due for contractual lease payments, reimbursements of common area maintenance expenses, property taxes and other expenses recoverable from tenants. Determination of the adequacy of the allowance for uncollectible current tenant receivables is performed using a methodology that incorporates specific identification, aging analysis, an overall evaluation of the historical loss trends and the current economic and business environment. The specific identification methodology relies on factors such as the age and nature of the receivables, the payment history and financial condition of the tenant, the assessment of the tenant’s ability to meet its lease obligations, and the status of negotiations of any disputes with the tenant. The allowance also includes a reserve based on historical loss trends not associated with any specific tenant. This reserve as well as the specific identification reserve is reevaluated quarterly based on economic conditions and the current business environment.

Deferred rent receivable represents the amount that the cumulative straight-line rental income recorded to date exceeds cash rents billed to date under the lease agreement. Given the long-term nature of these types of receivables, determination of the adequacy of the allowance for unbilled deferred rent receivable is based primarily on historical loss experience. Management evaluates the allowance for unbilled deferred rent receivable using a specific identification methodology for significant tenants designed to assess their financial condition and ability to meet their lease obligations.

Impairment of Long-Lived Assets: The Company evaluates a property for potential impairment whenever events or changes in circumstances indicate that its carrying amount may not be recoverable. On a quarterly basis, we evaluate our entire portfolio for impairment based on current operating information. In the event that these periodic assessments reflect that the carrying amount of a property exceeds the sum of the undiscounted cash flows (excluding interest) that are expected to result from the use and eventual disposition of the property, the Company would recognize an impairment loss to the extent the carrying amount exceeded the estimated fair value of the property. The estimation of expected future net cash flows is inherently uncertain and relies on subjective assumptions dependent upon future and current market conditions and events that affect the ultimate value of the property. Management must make assumptions related to the property such as future rental rates, tenant allowances, operating expenditures, property taxes, capital improvements, occupancy levels and the estimated proceeds generated from the future sale of the property. These assumptions could differ materially from actual results in future periods. Our intent to hold properties over the long-term directly decreases the likelihood of recording an impairment loss. If our strategy changes or if market conditions otherwise dictate an earlier sale date, an impairment loss could be recognized, and such loss could be material.

Depreciation: We compute depreciation on our buildings and improvements using the straight-line method based on estimated useful lives generally ranging from five to 30 years. A significant portion of the acquisition cost of each property is recorded to building and building components. The recording of the acquisition cost to building and building components, as well as the determination of their useful lives, are based on estimates. If we do not appropriately record to these components or we incorrectly estimate the useful lives of these components, our computation of depreciation expense may not appropriately reflect the actual impact of these costs over future periods, which will affect net income. In addition, the net book value of real estate assets could be overstated or understated. The statement of cash flows, however, would not be affected.

Accruals of Operating Expenses: The Company accrues for property tax expenses, performance bonuses and other operating expenses each quarter based on historical trends and anticipated disbursements. If these estimates are incorrect, the timing and amount of expense recognized will be affected.

Accruals for Contingencies: The Company is exposed to business and legal liability risks with respect to events that may have occurred, but in accordance with U.S. generally accepted accounting principles (“GAAP”) has not accrued for such potential liabilities because the loss is either not probable or not estimable. Future events could result in such potential losses becoming probable and estimable, which could have a material adverse impact on our financial condition or results of operations.

Effect of Economic Conditions on the Company’s Operations: During the first three months of 2013, while certain markets reflected signs of improving occupancy and rental rates, overall the Company experienced a modest decrease in new rental rates over expiring rental rates on executed leases as economic conditions are improving at a very slow pace combined with continued competitive conditions within the commercial real estate environment. The rate of decrease in new rent to outgoing rent continued to ease from a negative 6.2% for the year ended December 31, 2012 to a negative 3.4% for the three months ended March 31, 2013. Although it is uncertain what impact economic conditions and competition will have on the Company’s future ability to maintain existing occupancy levels and rental rates, management believes that the decrease in rental rates on lease transactions could negatively impact rental income for the full year 2013 compared to 2012. Current and future economic conditions and competition may continue to have a significant impact on the Company, potentially resulting in further reductions in occupancy and rental rates.

The Company historically has experienced a low level of write-offs of uncollectable rents, however, there is inherent uncertainty in a tenant’s ability to continue paying rent and meet their full lease obligation. The table below summarizes the impact to the Company from tenants’ inability to pay rent or continue to meet their lease obligations (in thousands) :


	For The Three Months Ended March 31,
	2013			2012
Write–offs of uncollectible rent	$	228		$	259
Write–offs as a percentage of rental income		0.3	%		0.3	%
Square footage of leases terminated prior to their scheduled expiration due to business failures/bankruptcies		84			183
Accelerated depreciation expense related to unamortized tenant improvements and lease commissions associated with early terminations	$	637		$	687

As of May 3, 2013, the Company had 30,000 square feet of leased space occupied by tenants that are protected by Chapter 11 of the U.S. Bankruptcy Code. From time to time, tenants contact us, requesting early termination of their lease, a reduction in space under lease, or rent deferment or abatement. At this time, the Company cannot anticipate what impact, if any, the ultimate outcome of these discussions will have on our future operating results.

Company Performance and Effect of Economic Conditions on Primary Markets: The Company’s operations are substantially concentrated in 10 regions. During the three months ended March 31, 2013, initial rental rates on new and renewed leases within the Company’s overall portfolio decreased 3.4% over expiring rents, an improvement from a decline of 6.2% for the year ended December 31, 2012. The Company’s Same Park (defined below) occupancy rate at March 31, 2013 was 92.1%, compared to 91.5% at March 31, 2012. The Company’s overall occupancy rate at March 31, 2013 was 89.6%, compared to 89.4% at March 31, 2012. Each of the 10 regions in which the Company owns assets is subject to its own unique market influences. See “Supplemental Property Data and Trends” below for more information on regional operating data.

Growth of the Company’s Operations from Acquisitions and Dispositions of Properties: The Company is focused on maximizing cash flow from its existing portfolio of properties by looking for opportunities to expand its presence in existing and new markets through strategic acquisitions. The Company may from time to time dispose of non-strategic assets that do not meet this criterion. The Company has historically maintained a low-leverage-level approach intended to provide the Company with the greatest level of flexibility for future growth.

As of March 31, 2013, the blended occupancy rate of the six assets acquired in 2011 and 2012 was 81.7% compared to a blended occupancy rate of 76.5% at the time of acquisition. As of March 31, 2013, the Company had 1.2 million square feet of vacancy spread over these six acquisitions which we believe provides the Company with considerable opportunity to generate additional rental income given that the Company’s Same Park assets in these same submarkets have a weighted occupancy of 93.2% at March 31, 2013. The table below contains the assets acquired from 2011 through 2012 (in thousands) :


Property	Date Acquired	Location	Purchase Price		Square Feet		Occupancy at Acquisition			Occupancy at March 31, 2013
Austin Flex Buildings	December, 2012	Austin, Texas	$	14,900		226		86.1	%		86.1	%
212 ^th Business Park	July, 2012	Kent Valley, Washington		37,550		958		52.3	%		50.4	%
Northern California Portfolio	December, 2011	East Bay, California		520,000		5,334		82.2	%		87.1	%
Royal Tech	October, 2011	Las Colinas, Texas		2,835		80		0.0	%		100.0	%
MICC – Center 22	August, 2011	Miami, Florida		3,525		46		33.3	%		33.5	%
Warren Building	June, 2011	Tysons Corner, Virginia		27,100		140		68.0	%		88.9	%

Total			$	605,910		6,784		76.5	%		81.7	%

Scheduled Lease Expirations: In addition to the 2.9 million square feet, or 10.4%, of space available in our total portfolio as of March 31, 2013, 1,534 leases representing 22.4% of the leased square footage of our total portfolio or 21.1% of annualized rental income are scheduled to expire during the remainder of 2013. Our ability to re-lease available space will depend upon market conditions in the specific submarkets in which our properties are located. As a result, we cannot predict with certainty the rate at which expiring leases will be re-leased.

Impact of Inflation: Although inflation has not been significant in recent years, it remains a potential factor in our economy, and the Company continues to seek ways to mitigate its potential impact. A substantial portion of the Company’s leases require tenants to pay operating expenses, including real estate taxes, utilities, and insurance, as well as increases in common area expenses, partially reducing the Company’s exposure to inflation.

Concentration of Portfolio by Region: The table below reflects the Company’s square footage from continuing operations based on regional concentration as of March 31, 2013 (in thousands) :


	Square Footage		Percent of Square Footage			2013 NOI			Percent of NOI
Region
California
Northern California		7,153		25.4	%	$	11,461			19.5	%
Southern California		3,988		14.1	%		8,956			15.2	%
Virginia		4,040		14.3	%		13,321			22.7	%
Florida		3,717		13.2	%		5,400			9.2	%
Texas
Northern Texas		1,769		6.3	%		3,032			5.2	%
Southern Texas		1,717		6.1	%		3,154			5.4	%
Maryland		2,352		8.3	%		7,815			13.3	%
Washington		1,479		5.2	%		1,841			3.1	%
Oregon		1,314		4.7	%		2,984			5.1	%
Arizona		679		2.4	%		772			1.3	%

Total		28,208		100.0	%	$	58,736			100.0	%

Reconciliation of NOI to income from continuing operations
Total NOI						$	58,736
Other income and (expenses):
Facilities management fees							158
Interest and other income							43
Interest and other expense							(4,588	)
Depreciation and amortization							(26,961	)
General and administrative							(2,399	)

Income from continuing operations						$	24,989

Concentration of Credit Risk by Industry: The information below depicts the industry concentration of our tenant base as of March 31, 2013. The Company analyzes this concentration to minimize significant industry exposure risk.


Industry	Percent of Annualized Rental Income
Business services		15.5	%
Government		10.9	%
Computer hardware, software and related services		10.4	%
Health services		10.2	%
Warehouse, distribution, transportation and logistics		8.9	%
Insurance and financial services		6.1	%
Engineering and construction		5.9	%
Retail, food and automotive		5.6	%
Communications		4.7	%
Aerospace/defense products and services		3.3	%
Electronics		3.2	%
Home furnishings		3.2	%
Educational services		1.9	%
Other		10.2	%

Total		100.0	%

The information below depicts the Company’s top 10 customers by annualized rental income as of March 31, 2013 (in thousands) :


Tenants	Square Footage		Annualized Rental Income ⁽¹⁾		Percent of Annualized Rental Income
U.S. Government		870	$	20,882		6.0	%
Lockheed Martin Corporation		166		4,752		1.4	%
Kaiser Permanente		199		4,238		1.2	%
Level 3 Communications, LLC		197		3,796		1.1	%
Keeco, LLC.		460		2,989		0.9	%
Luminex Corporation		171		2,627		0.7	%
Wells Fargo		118		2,236		0.6	%
Salient Federal Solutions, Inc.		58		1,830		0.5	%
Raytheon		101		1,696		0.5	%
Welch Allyn Protocol, Inc.		103		1,664		0.5	%

Total		2,443	$	46,710		13.4	%

⁽¹⁾	For leases expiring prior to December 31, 2013, annualized rental income represents income to be received under existing leases from April 1, 2013 through the date of expiration.

Comparative Analysis of the Three Months Ended March 31, 2013 to the Three Months Ended March 31, 2012

Results of Operations: In order to evaluate the performance of the Company’s portfolio over comparable periods, management analyzes the operating performance of properties owned and operated throughout both periods (herein referred to as “Same Park”). The Company defines Same Park to include all operating properties owned or acquired prior to January 1, 2011. Operating properties that the Company acquired subsequent to January 1, 2011 are referred to as “Non-Same Park.” For the three months ended March 31, 2013 and 2012, the Same Park facilities constitute 21.4 million rentable square feet, representing 76.0% of the 28.2 million square feet in the Company’s portfolio as of March 31, 2013.

Rental income, cost of operations and rental income less cost of operations, excluding depreciation and amortization, or net operating income (defined as “NOI” for purposes of the following tables), are summarized for the three months ended March 31, 2013 and 2012. The Company uses NOI and its components as a measurement of the performance of its commercial real estate. Management believes that these financial measures provide them, as well as the investor, the most consistent measurement on a comparative basis of the performance of the commercial real estate and its contribution to the value of the Company. Depreciation and amortization have been excluded from NOI as they are generally not used in determining the value of commercial real estate by management or the investment community. Depreciation and amortization are generally not used in determining value as they consider the historical costs of an asset compared to its current value; therefore, to understand the effect of the assets’ historical cost on the Company’s results, investors should look at GAAP financial measures, such as total operating costs including depreciation and amortization. The Company’s calculation of NOI may not be comparable to those of other companies and should not be used as an alternative to measures of performance calculated in accordance with GAAP. As part of the tables below, we have reconciled total NOI to income from continuing operations, which we consider the most directly comparable financial measure calculated in accordance with GAAP.

The following table presents the operating results of the Company’s properties for the three months ended March 31, 2013 and 2012 in addition to other income and expense items affecting income from continuing operations (in thousands, except per square foot data) :


	For the Three Months Ended March 31,
	2013			2012			Change
Rental income:
Same Park (21.4 million rentable square feet)	$	74,275		$	73,229			1.4	%
Non-Same Park (6.8 million rentable square feet)		13,845			11,448			20.9	%

Total rental income		88,120			84,677			4.1	%

Cost of operations:
Same Park		25,160			24,482			2.8	%
Non-Same Park		4,224			3,633			16.3	%

Total cost of operations		29,384			28,115			4.5	%

Net operating income:
Same Park		49,115			48,747			0.8	%
Non-Same Park		9,621			7,815			23.1	%

Total net operating income		58,736			56,562			3.8	%

Other income and (expenses):
Facility management fees		158			166			(4.8	%)
Interest and other income		43			43			—
Interest and other expense		(4,588	)		(5,348	)		(14.2	%)
Depreciation and amortization		(26,961	)		(27,244	)		(1.0	%)
General and administrative		(2,399	)		(2,273	)		5.5	%

Income from continuing operations	$	24,989		$	21,906			14.1	%

Same Park gross margin ⁽¹⁾		66.1	%		66.6	%		(0.8	%)
Same Park weighted average occupancy		92.0	%		91.6	%		0.4	%
Non-Same Park weighted average occupancy		80.9	%		81.0	%		(0.1	%)
Same Park annualized realized rent per square foot ⁽²⁾	$	15.07		$	14.93			0.9	%

⁽¹⁾	Same Park gross margin is computed by dividing Same Park NOI by Same Park rental income.

⁽²⁾	Same Park annualized realized rent per square foot represents the annualized Same Park rental income earned per occupied square foot.

Supplemental Property Data and Trends: Rental income, cost of operations and rental income less cost of operations, excluding depreciation and amortization, or net operating income prior to depreciation and amortization (defined as “NOI” for purposes of the following table) from continuing operations is summarized for the three months ended March 31, 2013 and 2012 by region below. See “Results of Operations” above for more information on NOI, including why the Company presents NOI and how the Company uses NOI. The Company’s calculation of NOI may not be comparable to those of other companies and should not be used as an alternative to measures of performance calculated in accordance with GAAP.

The following table summarizes the Same Park operating results by region for the three months ended March 31, 2013 and 2012. In addition, the table reflects the comparative impact on the overall rental income, cost of operations and NOI from properties that have been acquired since January 1, 2011, and the impact of such is included in Non-Same Park facilities in the table below. As part of the table below, we have reconciled total NOI to income from continuing operations (in thousands) :


Region	Rental Income March 31, 2013		Rental Income March 31, 2012		Increase (Decrease)			Cost of Operations March 31, 2013		Cost of Operations March 31, 2012		Increase (Decrease)			NOI March 31, 2013			NOI March 31, 2012			Increase (Decrease)
Same Park
Northern California	$	5,133	$	4,858		5.7	%	$	1,720	$	1,534		12.1	%	$	3,413		$	3,324			2.7	%
Southern California		13,362		12,588		6.1	%		4,406		4,228		4.2	%		8,956			8,360			7.1	%
Virginia		19,236		19,509		(1.4	%)		6,602		6,510		1.4	%		12,634			12,999			(2.8	%)
Florida		8,057		8,098		(0.5	%)		2,676		2,506		6.8	%		5,381			5,592			(3.8	%)
Northern Texas		4,215		4,146		1.7	%		1,425		1,404		1.5	%		2,790			2,742			1.8	%
Southern Texas		4,342		4,036		7.6	%		1,489		1,451		2.6	%		2,853			2,585			10.4	%
Maryland		11,790		12,189		(3.3	%)		3,975		3,906		1.8	%		7,815			8,283			(5.7	%)
Washington		2,162		2,113		2.3	%		645		647		(0.3	%)		1,517			1,466			3.5	%
Oregon		4,610		4,182		10.2	%		1,626		1,674		(2.9	%)		2,984			2,508			19.0	%
Arizona		1,368		1,510		(9.4	%)		596		622		(4.2	%)		772			888			(13.1	%)

Total Same Park		74,275		73,229		1.4	%		25,160		24,482		2.8	%		49,115			48,747			0.8	%

Non-Same Park
Northern California		11,242		10,293		9.2	%		3,194		3,226		(1.0	%)		8,048			7,067			13.9	%
Virginia		1,005		860		16.9	%		318		292		8.9	%		687			568			21.0	%
Florida		66		44		50.0	%		47		46		2.2	%		19			(2	)		(1,050.0	%)
Northern Texas		336		251		33.9	%		94		69		36.2	%		242			182			33.0	%
Southern Texas		467		—		100.0	%		166		—		100.0	%		301			—			100.0	%
Washington		729		—		100.0	%		405		—		100.0	%		324			—			100.0	%

Total Non-Same Park		13,845		11,448		20.9	%		4,224		3,633		16.3	%		9,621			7,815			23.1	%

Total	$	88,120	$	84,677		4.1	%	$	29,384	$	28,115		4.5	%	$	58,736		$	56,562			3.8	%

Reconciliation of NOI to income from continuing operations
Total NOI															$	58,736		$	56,562			3.8	%
Other income and (expenses):
Facilities management fees																158			166			(4.8	%)
Interest and other income																43			43			—
Interest and other expense																(4,588	)		(5,348	)		(14.2	%)
Depreciation and amortization																(26,961	)		(27,244	)		(1.0	%)
General and administrative																(2,399	)		(2,273	)		5.5	%

Income from continuing operations															$	24,989		$	21,906			14.1	%

The following table summarizes Same Park weighted average occupancy rates and annualized realized rent per square foot by region for the three months ended March 31, 2013 and 2012.


	Weighted Average Occupancy Rates									Annualized Realized Rent Per Square Foot
Region	2013			2012			Change			2013		2012		Change
Northern California		90.3	%		90.5	%		(0.2	%)	$	12.51	$	11.81		5.9	%
Southern California		91.4	%		90.5	%		1.0	%	$	14.67	$	13.96		5.1	%
Virginia		91.9	%		90.7	%		1.3	%	$	21.46	$	22.05		(2.7	%)
Florida		96.3	%		96.9	%		(0.6	%)	$	9.11	$	9.10		0.1	%
Northern Texas		89.4	%		94.9	%		(5.8	%)	$	11.16	$	10.34		7.9	%
Southern Texas		96.4	%		92.7	%		4.0	%	$	12.08	$	11.68		3.4	%
Maryland		88.0	%		87.9	%		0.1	%	$	22.79	$	23.58		(3.4	%)
Washington		94.9	%		91.6	%		3.6	%	$	17.49	$	17.71		(1.2	%)
Oregon		90.5	%		86.4	%		4.7	%	$	15.51	$	14.73		5.3	%
Arizona		89.9	%		91.5	%		(1.7	%)	$	8.96	$	9.72		(7.8	%)
Total Same Park		92.0	%		91.6	%		0.4	%	$	15.07	$	14.93		0.9	%

Rental Income: Rental income increased $3.4 million from $84.7 million for the three month ended March 31, 2012 to $88.1 million for the three months ended March 31, 2013 as a result of a $2.4 million increase in rental income from Non-Same Park facilities combined with an increase in rental income from the Same Park portfolio of $1.0 million driven by an increase in occupancy rates.

Facility Management Fees: Facility management fees, derived from PS, account for a small portion of the Company’s revenues. During the three months ended March 31, 2013, $158,000 of revenue was recognized from facility management fees compared to $166,000 for the three months ended March 31, 2012.

Cost of Operations: Cost of operations for the three months ended March 31, 2013 was $29.4 million compared to $28.1 million for the three months ended March 31, 2012, an increase of $1.3 million, or 4.5% as a result of an increase in cost of operations from the Same Park portfolio of $678,000 combined with an increase in cost of operations from Non-Same Park facilities of $591,000. The increase in Same Park cost of operations was driven by an increase in repairs and maintenance costs partly due to a $277,000 increase in snow removal costs and by increases in compensation and insurance costs partially offset by a decrease in utility costs.

Depreciation and Amortization Expense: Depreciation and amortization expense was $27.0 million for the three months ended March 31, 2013 compared to $27.2 million for the three months ended March 31, 2012.

General and Administrative Expenses : For the three months ended March 31, 2013, general and administrative expenses increased $126,000, or 5.5%, over the same period in 2012. The three month increase was primarily due to amortization of the long term incentive plan partially offset by a decrease in redemption notification costs related to preferred equity redemptions reported during first quarter of 2012.

Interest and Other Expense: Interest and other expense was $4.6 million for the three months ended March 31, 2013 compared to $5.3 million for the three months ended March 31, 2012. For the three months ended March 31, 2013, interest expense included accelerated amortization of commitment fees of $183,000 as a result of the $110.0 million reduction of the term loan balance. The decrease in interest and other expense was primarily attributable to the reduction of the term loan balance and repayment of mortgage notes payable of $18.1 million during the three months ended March 31, 2013 combined with no borrowings on the credit facility partially offset with the accelerated amortization of commitment fees.

Net Income Allocable to Noncontrolling Interests: Net income allocable to noncontrolling interests reflects the net income allocable to equity interests in the Operating Partnership that are not owned by the Company. Net income allocable to noncontrolling interests was $2.6 million of allocated income to common unit holders for the three months ended March 31, 2013 compared to $1.1 million of allocated income ($99,000 allocated to preferred unit holders and $1.0 million allocated to common unit holders) for the three months ended March 31, 2012. The increase in net income allocable to noncontrolling interests was primarily due to the net impact of non-cash preferred equity transactions related to first quarter of 2012 combined with an increase in net operating income.

Liquidity and Capital Resources

Cash and cash equivalents decreased $4.8 million from $12.9 million at December 31, 2012 to $8.1 million at March 31, 2013 for the reasons noted below.

Net cash provided by operating activities for the three months ended March 31, 2013 and 2012 was $52.5 million and $55.7 million, respectively. The decrease of $3.2 million in net cash provided by operating activities was primarily due to a $3.1 million decrease in accrued and other liabilities for the three months ended March 31, 2013 compared to a $4.2 million increase in the same period of 2012 partially offset by an increase in net operating income of $2.2 million. Management believes that the Company’s internally generated net cash provided by operating activities will be sufficient to enable it to meet its operating expenses, capital improvements, debt service requirements and distributions to shareholders for the foreseeable future.

Net cash used in investing activities was $9.7 million and $11.1 million for the three months ended March 31, 2013 and 2012, respectively. The change was primarily due to a decrease in capital improvements of $1.4 million.

Net cash used in financing activities was $47.7 million and $43.6 million for the three months ended March 31, 2013 and 2012, respectively. The change was primarily due to net debt repayment of $128.0 million for the three months ended March 31, 2013 compared to $79.0 million in the same period of 2012 partially offset by a reduction in net proceeds from preferred equity transactions of $47.8 million.

As of March 31, 2013, the Company had outstanding mortgage notes payable of $250.0 million compared to $268.1 million at December 31, 2012. See Notes 5 and 6 to the consolidated financial statements for a summary of the Company’s outstanding borrowings as of March 31, 2013.

The Company’s preferred equity outstanding remained at 26.0% of its market capitalization from December 31, 2012 to March 31, 2013. The Company used the net proceeds from the issuance of preferred stock to reduce its outstanding unsecured Term Loan during the three months ended March 31, 2013. As of March 31, 2013, the Company had one fixed-rate mortgage note totaling $250.0 million and an outstanding balance on the Term Loan of $90.0 million, which collectively represented 8.8% of its total market capitalization. The Company calculates market capitalization by adding (1) the liquidation preference of the Company’s outstanding preferred equity, (2) principal value of the Company’s outstanding debt and (3) the total number of common shares and common units outstanding at March 31, 2013 multiplied by the closing price of the stock on that date. The interest rate for the mortgage note is 5.45% per annum. The Company had 21.7% of its properties, in terms of net book value, encumbered at March 31, 2013.

The Company focuses on retaining cash for reinvestment as we believe that this provides the greatest level of financial flexibility. While operating results have been negatively impacted by the slow economic conditions, we believe it is likely that as the economy recovers and operating fundamentals improve, additional increases in distributions to the Company’s common shareholders will be required. Going forward, the Company will continue to monitor its taxable income and the corresponding dividend requirements.

Issuance of Preferred Stock: On March 14, 2013, the Company issued $110.0 million or 4.4 million depositary shares, each representing 1/1,000 of a share of the 5.70% Cumulative Preferred Stock, Series V, at $25.00 per depositary share.

Redemption of Preferred Equity: On October 9, 2012, the Company completed the redemption of its 6.70% Cumulative Preferred Stock, Series P, at its par value of $132.3 million. The Company reported the excess of the redemption amount over the carrying amount of $3.8 million, equal to the original issuance costs, as a reduction of net income allocable to common shareholders and unit holders for the three months ended December 31, 2012.

Repurchase of Common Stock: The Company’s Board of Directors previously authorized the repurchase, from time to time, of up to 6.5 million shares of the Company’s common stock on the open market or in privately negotiated transactions. Since inception of the program, the Company has repurchased an aggregate of 4.9 million shares of common stock at an aggregate cost of $183.9 million or an average cost per share of $37.64. Under existing board authorizations, the Company can repurchase an additional 1.6 million shares. No shares of common stock were repurchased under this program during the three months ended March 31, 2013 or for the year ended December 31, 2012.

Mortgage Note Repayment: In January, 2013, the Company repaid two mortgage notes payable totaling $18.1 million with a combined weighted average stated interest rate of 5.60%.

In November, 2012, the Company repaid $13.2 million on a mortgage note with a stated interest rate of 5.73%.

Capital Expenditures: The Company defines recurring capital expenditures as those necessary to maintain and operate its commercial real estate at its current economic value. During the three months ended March 31, 2013 and 2012, the Company expended $8.9 million and $10.0 million, respectively, in recurring capital expenditures, or $0.31 and $0.37 per weighted average square foot owned, respectively. Tenant improvement amounts exclude those amounts reimbursed by the tenant. Nonrecurring capital improvements include property renovations and expenditures related to repositioning acquisitions. The following table depicts capital expenditures (in thousands) :


	For the Three Months Ended March 31,
	2013		2012
Recurring capital expenditures
Capital improvements	$	909	$	1,116
Tenant improvements		5,792		7,583
Lease commissions		2,215		1,269

Total recurring capital expenditures		8,916		9,968

Nonrecurring capital improvements		776		1,085

Total capital expenditures	$	9,692	$	11,053

Capital expenditures on a per square foot owned basis are as follows:


	For the Three Months Ended March 31,
	2013		2012
Recurring capital expenditures
Capital improvements	$	0.03	$	0.04
Tenant improvements		0.20		0.28
Lease commissions		0.08		0.05

Total recurring capital expenditures		0.31		0.37

Nonrecurring capital improvements		0.03		0.04

Total capital expenditures	$	0.34	$	0.41

For the three months ended March 31, 2013, recurring capital expenditures decreased $1.1 million, or 10.6%, over the same period in 2012 primarily due to cash paid for several significant tenant improvement projects within the Same Park portfolio in 2012.

Distributions: The Company has elected and intends to qualify as a REIT for federal income tax purposes. In order to maintain its status as a REIT, the Company must meet, among other tests, sources of income, share ownership and certain asset tests. As a REIT, the Company is not taxed on that portion of its taxable income that is distributed to its shareholders provided that at least 90% of its taxable income is distributed to its shareholders prior to the filing of its tax return.

The Company’s funding strategy has been to primarily use permanent capital, including common and preferred stock, along with internally generated retained cash flows to meet its liquidity needs. In addition, the Company may sell properties that no longer meet its investment criteria. From time to time, the Company may use its Credit Facility or other forms of debt to facilitate real estate acquisitions or other capital allocations. The Company targets a minimum ratio of FFO to combined fixed charges and preferred distributions of 3.0 to 1.0. Fixed charges include interest expense. Preferred distributions include amounts paid to preferred shareholders and preferred Operating Partnership unit holders. For the three months ended March 31, 2013, the FFO to fixed charges and preferred distributions coverage ratio was 3.1 to 1.0, excluding the charge for the issuance costs related to the redemption of preferred equity.

Non-GAAP Supplemental Disclosure Measure: Funds from Operations: Management believes that Funds from Operations (“FFO”) is a useful supplemental measure of the Company’s operating performance. The Company computes FFO in accordance with the White Paper on FFO approved by the Board of Governors of the National Association of Real Estate Investment Trusts (“NAREIT”). The White Paper defines FFO as net income, computed in accordance with GAAP, before depreciation, amortization, gains or losses on asset dispositions, net income allocable to noncontrolling interests —common units, net income allocable to restricted stock unit holders, impairment charges and nonrecurring items. Management believes that FFO provides a useful measure of the Company’s operating performance and when compared year over year, reflects the impact to operations from trends in occupancy rates, rental rates, operating costs, development activities, general and administrative expenses and interest costs, providing a perspective not immediately apparent from net income.

FFO should be analyzed in conjunction with net income. However, FFO should not be viewed as a substitute for net income as a measure of operating performance or liquidity as it does not reflect depreciation and amortization costs or the level of capital expenditure and leasing costs necessary to maintain the operating performance of the Company’s properties, which are significant economic costs and could materially affect the Company’s results of operations.

Management believes FFO provides useful information to the investment community about the Company’s operating performance when compared to the performance of other real estate companies as FFO is generally recognized as the industry standard for reporting operations of REITs. Other REITs may use different methods for calculating FFO and, accordingly, our FFO may not be comparable to other real estate companies.

FFO for the Company is computed as follows ( in thousands ):


	For the Three Months Ended March 31,
	2013			2012
Net income allocable to common shareholders	$	8,540		$	3,467
Depreciation and amortization ⁽¹⁾		26,961			27,299
Net income allocable to noncontrolling interests — common units		2,566			1,049
Net income allocable to restricted stock unit holders		33			44

FFO allocable to common and dilutive shares		38,100			31,859

FFO allocated to noncontrolling interests — common units		(8,777	)		(7,371	)
FFO allocated to restricted stock unit holders		(117	)		(114	)

FFO allocated to common shares	$	29,206		$	24,374

Weighted average common shares outstanding		24,308			24,157
Weighted average common OP units outstanding		7,305			7,305
Weighted average restricted stock units outstanding		97			113
Weighted average common share equivalents outstanding		103			84

Total common and dilutive shares		31,813			31,659

FFO per common and dilutive share	$	1.20		$	1.01
Non-cash distributions related to the redemption of preferred equity		—			0.16

FFO per common and dilutive share, as adjusted	$	1.20		$	1.17

⁽¹⁾	Includes depreciation from discontinued operations.

In order to provide a meaningful period-to-period comparison of FFO derived from the Company’s ongoing business operations, the table above reconciles reported FFO to adjusted FFO which excludes the impact of non-cash distributions related to the redemption of preferred equity on the Company’s FFO per common and dilutive share for the three months ended March 31, 2013 and 2012. Non-cash distributions related to the redemption of preferred equity of $5.3 million were included in net income allocable to preferred shareholders for the three months ended March 31, 2012.

FFO allocable to common and dilutive shares increased $6.2 million for the three months ended March 31, 2013 compared to the same period in 2012. The three month increase was primarily due to the net impact of preferred equity transactions (noted above) and an increase in net operating income from Non-Same Park facilities combined with a decrease in interest expense.

Related Party Transactions: At March 31, 2013, PS owned 23.8% of the outstanding shares of the Company’s common stock and 23.1% of the outstanding common units of the Operating Partnership (100.0% of the common units not owned by the Company). Assuming issuance of the Company’s common stock upon redemption of its partnership units, PS would own 41.4% of the outstanding shares of the Company’s common stock. Ronald L. Havner, Jr., the Company’s chairman, is also the Chairman of the Board, Chief Executive Officer and President of PS. Gary E. Pruitt, an independent director of the Company is also a trustee of PS.

Pursuant to a cost sharing and administrative services agreement, the Company shares costs with PS for certain administrative services, which were allocated to PS in accordance with a methodology intended to fairly allocate those costs. These costs totaled $108,000 and $110,000 for the three months ended March 31, 2013 and 2012, respectively. In addition, the Company provides property management services for properties owned by PS for a management fee of 5% of the gross revenues of such properties in addition to reimbursement of direct costs. These management fee revenues recognized under management contract with PS totaled $158,000 and $166,000 for the three months ended March 31, 2013 and 2012, respectively. PS also provides property management services for the self-storage component of two assets owned by the Company for a fee of 6% of the gross revenues of such properties in addition to reimbursement of certain costs. Management fee expense recognized under the management contract with PS totaled $14,000 and $13,000 for the three months ended March 31, 2013 and 2012, respectively.

The PS Business Parks name and logo is owned by PS and licensed to the Company under a non-exclusive, royalty-free license agreement. The license can be terminated by either party for any reason with six-months written notice.

Off-Balance Sheet Arrangements: The Company does not have any off-balance sheet arrangements.

Contractual Obligations: The Company is scheduled to pay cash dividends of $60.5 million per year on its preferred equity outstanding as of March 31, 2013. Dividends are paid when and if declared by the Company’s Board of Directors and accumulate if not paid. Shares and units of preferred equity are redeemable by the Company in order to preserve its status as a REIT and are also redeemable five years after issuance.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

To limit the Company’s exposure to market risk, the Company principally finances its operations and growth with permanent equity capital consisting of either common or preferred stock. The Company, from time to time, will use debt financing to facilitate acquisitions. In connection with the Northern California Portfolio acquisition, the Company assumed a $250.0 million mortgage note and obtained a $250.0 million term loan. As a result of the acquisition, the Company’s debt as a percentage of total equity (based on book values) was 19.8% as of March 31, 2013.

The Company’s market risk sensitive instruments include a mortgage note of $250.0 million and the outstanding balance on the Term Loan of $90.0 million as of March 31, 2013. The Company’s mortgage note bear interest at a fixed rate of 5.45% at March 31, 2013. The Term Loan bears interest at variable rates which is currently LIBOR plus 1.20%. See Notes 2, 5 and 6 to consolidated financial statements for terms, valuations and approximate principal maturities of the mortgage notes payable, Credit Facility and Term Loan as of March 31, 2013. Based on borrowing rates currently available to the Company, the difference between the carrying amount of debt and its fair value is insignificant.

ITEM 4. CONTROLS AND PROCEDURES

The Company’s management, with the participation of the Company’s Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of the Company’s disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) as of March 31, 2013. Management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives and management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures. Based on the evaluation of the Company’s disclosure controls and procedures as of March 31, 2013, the Company’s Chief Executive Officer and Chief Financial Officer concluded that, as of such date, the Company’s disclosure controls and procedures were effective at the reasonable assurance level.

No change in the Company’s internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) occurred during the fiscal quarter ended March 31, 2013 that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting.

PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

The Company currently is neither subject to any material litigation nor, to management’s knowledge, is any material litigation currently threatened against the Company other than routine litigation and administrative proceedings arising in the ordinary course of business.

ITEM 1A. RISK FACTORS

There have been no material changes to the risk factors included in our Annual Report on Form 10-K for the year ended December 31, 2012.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

The Company’s Board of Directors has authorized the repurchase, from time to time, of up to 6.5 million shares of the Company’s common stock on the open market or in privately negotiated transactions. The authorization has no expiration date. Purchases will be made subject to market conditions and other investment opportunities available to the Company.

During the three months ended March 31, 2013, there were no shares of the Company’s common stock repurchased. As of March 31, 2013, 1,614,721 shares remain available for purchase under the program.

See Note 9 to the consolidated financial statements for additional information on repurchases of equity securities.

ITEM 6. EXHIBITS


Exhibits

Exhibit 3.1		Certificate of Determination of Preferences of 5.70% Series V Cumulative Redeemable Preferred Stock of PS Business Parks, Inc. Field with Registrant’s Current Report on Form 8-K dated March 5, 2013 and incorporated herein by reference. (File No. 001-10709)

Exhibit 4.1		Deposit Agreement Relating to 5.70% Cumulative Preferred Stock, Series V of PS Business Parks, Inc. dated as of March 5, 2013. Filed with Registrant’s Current Report on Form 8-K dated March 5, 2013, and incorporated herein by reference. (File No. 001-10709)

Exhibit 10.1		Amendment to Agreement of Limited Partnership of PS Business Parks, L.P. relating to 5.70% Series V Cumulative Preferred Stock, dated as of March 14, 2013. Filed herewith.

Exhibit 12		Statement re: Computation of Ratio of Earnings to Fixed Charges. Filed herewith.

Exhibit 31.1		Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. Filed herewith.

Exhibit 31.2		Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. Filed herewith.

Exhibit 32.1		Certifications of Chief Executive Officer and Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. Filed herewith.

Exhibit 101.INS		XBRL Instance Document. Filed herewith.

Exhibit 101.SCH		XBRL Taxonomy Extension Schema. Filed herewith.

Exhibit 101.CAL		XBRL Taxonomy Extension Calculation Linkbase. Filed herewith.

Exhibit 101.DEF		XBRL Taxonomy Extension Definition Linkbase. Filed herewith.

Exhibit 101.LAB		XBRL Taxonomy Extension Label Linkbase. Filed herewith.

Exhibit 101.PRE		XBRL Taxonomy Extension Presentation Linkbase. Filed herewith.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.


Dated: May 9, 2013

PS BUSINESS PARKS, INC.

BY:		/s/ Edward A. Stokx
		Edward A. Stokx
		Executive Vice President and Chief Financial Officer
		(Principal Financial Officer)

EXHIBIT INDEX


Exhibits

Exhibit 3.1		Certificate of Determination of Preferences of 5.70% Series V Cumulative Redeemable Preferred Stock of PS Business Parks, Inc. Field with Registrant’s Current Report on Form 8-K dated March 5, 2013 and incorporated herein by reference. (File No. 001-10709)

Exhibit 4.1		Deposit Agreement Relating to 5.70% Cumulative Preferred Stock, Series V of PS Business Parks, Inc. dated as of March 5, 2013. Filed with Registrant’s Current Report on Form 8-K dated March 5, 2013, and incorporated herein by reference. (File No. 001-10709)

Exhibit 10.1		Amendment to Agreement of Limited Partnership of PS Business Parks, L.P. relating to 5.70% Series V Cumulative Preferred Stock, dated as of March 14, 2013. Filed herewith.

Exhibit 12		Statement re: Computation of Ratio of Earnings to Fixed Charges. Filed herewith.

Exhibit 31.1		Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. Filed herewith.

Exhibit 31.2		Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. Filed herewith.

Exhibit 32.1		Certifications of Chief Executive Officer and Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. Filed herewith.

Exhibit 101.INS		XBRL Instance Document. Filed herewith.

Exhibit 101.SCH		XBRL Taxonomy Extension Schema. Filed herewith.

Exhibit 101.CAL		XBRL Taxonomy Extension Calculation Linkbase. Filed herewith.

Exhibit 101.DEF		XBRL Taxonomy Extension Definition Linkbase. Filed herewith.

Exhibit 101.LAB		XBRL Taxonomy Extension Label Linkbase. Filed herewith.

Exhibit 101.PRE		XBRL Taxonomy Extension Presentation Linkbase. Filed herewith.

Exhibit 10.1

PS BUSINESS PARKS, L.P.

AMENDMENT TO AGREEMENT OF LIMITED

PARTNERSHIP RELATING TO

5.70% SERIES V CUMULATIVE REDEEMABLE

PREFERRED UNITS

This Amendment to the Agreement of Limited Partnership of PS Business Parks, L.P., a California limited partnership (the “ Partnership ”), dated as of March 14, 2013 (this “Amendment” ), amends the Agreement of Limited Partnership of the Partnership, dated as of March 17, 1998, as amended, by and among PS Business Parks, Inc. (the “ General Partner ”) and each of the limited partners described on Exhibit A to that partnership agreement (the “ Partnership Agreement ”). Section references are (unless otherwise specified) references to sections in this Amendment.

WHEREAS, the General Partner agreed to issue up to 4,600,000 Depositary Shares each representing 1/1000th of a share of the General Partner’s preferred stock designated as the “5.70% Cumulative Preferred Stock, Series V” (the “ Depositary Shares ”) for a price of $25.00 per Depositary Share;

WHEREAS, Section 4.1(b)(2) of the Partnership Agreement requires the General Partner to contribute to the Partnership the funds raised through the issuance of additional shares of the General Partner in return for additional Partnership Units, and provides that the General Partner’s capital contribution shall be deemed to equal the amount of the gross proceeds of that share issuance (i.e., the net proceeds actually contributed, plus any underwriter’s discount or other expenses incurred, with any such discount or expense deemed to have been incurred on behalf of the Partnership);

WHEREAS, Section 4.2(a) of the Partnership Agreement provides generally for the creation and issuance of Partnership Units with such designations, preferences and relative, participating, optional or other special rights, powers and duties, including rights, powers and duties senior to other Partnership Interests, all as shall be determined by the General Partner, without the consent of the Limited Partners, and Section 4.2(b) of the Partnership Agreement specifically contemplates the issuance of Units to the General Partner having designations, preferences and other rights, all such that the economic interests are substantially similar to the designations, preferences and other rights of shares issued by the General Partner, such as the Depositary Shares;

WHEREAS, the General Partner desires to cause the Partnership to issue additional Units of a new class and series, with the designations, preferences and relative, participating, optional or other special rights, powers and duties set forth herein; and

WHEREAS, the General Partner desires by this Amendment to so amend the Partnership Agreement as of the date first set forth above to provide for the designation and issuance of such new class and series of Units.

NOW, THEREFORE, the Partnership Agreement is hereby amended by establishing and fixing the rights, limitations and preferences of a new class and series of Units as follows:

Section 1. Definitions . Capitalized terms not otherwise defined herein shall have their respective meanings set forth in the Partnership Agreement. Capitalized terms that are used in this Amendment shall have the meanings set forth below:

(a) “Liquidation Preference” means, with respect to the Series V Preferred Units (as defined below), $25.00 per Series V Preferred Unit, plus the amount of any accumulated and unpaid Priority Return (as defined below) with respect to such Series V Preferred Unit, whether or not declared, minus any distributions in excess of the Priority Return that has accrued with respect to such Series V Preferred Units, to the date of payment.

(b) “Parity Preferred Units” means any class or series of Partnership Interests (as such term is defined in the Partnership Agreement) of the Partnership now or hereafter authorized, issued or outstanding and expressly designated by the Partnership to rank on a parity with the Series V Preferred Units with respect to distributions and rights upon voluntary or involuntary liquidation, winding-up or dissolution of the Partnership, including the 6.875% Series R Cumulative Redeemable Preferred Units (the “ Series R Preferred Units ”), the 6.45% Series S Cumulative Redeemable Preferred Units (the “ Series S Preferred Units ”), the 6.00% Series T Cumulative Redeemable Preferred Units (the “ Series T Preferred Units ”) and the 5.75% Series U Cumulative Redeemable Preferred Units (the “ Series U Preferred Units ”). Notwithstanding the differing allocation rights set forth in Section 4 below that apply to the Series R, S, T and U Preferred Units.

(c) “ Priority Return ” means an amount equal to 5.70% per annum, of the Liquidation Preference per Series V Preferred Unit, commencing on the date of issuance of such Series V Preferred Unit, determined on the basis of a 360-day year (and twelve 30-day months), cumulative to the extent not distributed on any Series V Preferred Unit Distribution Payment Date (as defined below).

Section 2. Creation of Series V Preferred Units . (a) Designation and Number. Pursuant to Section 4.2(a) of the Partnership Agreement, a series of Partnership Units (as such term is defined in the Partnership Agreement) in the Partnership designated as the “5.70% Series V Cumulative Redeemable Preferred Units” (the “ Series V Preferred Units ”) is hereby established effective as of March [14], 2013. The number of Series V Preferred Units shall be 4,600,000. The Holders of Series V Preferred Units shall not have any Percentage Interest (as such term is defined in the Partnership Agreement) in the Partnership.

(b) Capital Contribution . In return for the issuance to the General Partner of the Series V Preferred Units set forth on Exhibit C to this Amendment, the General Partner has contributed to the Partnership the funds raised through the General Partner’s issuance of the Depositary Shares (the General Partner’s capital contribution shall be deemed to equal the amount of the gross proceeds of that share issuance, i.e. , the net proceeds actually contributed, plus any underwriter’s discount or other expenses incurred, with any such discount or expense deemed to have been incurred by the General Partner on behalf of the Partnership).

(c) Construction . The Series V Preferred Units have been created and are being issued in conjunction with the General Partner’s issuance of the Depositary Shares relating to the General Partner’s 5.70% Cumulative Preferred Stock, Series V, and as such, the Series V Preferred Units are intended to have designations, preferences and other rights, all such that the economic interests are substantially similar to the designations, preferences and other rights of the Depositary Shares, and the terms of this Amendment shall be interpreted in a fashion consistent with this intent.

Section 3. Distributions . (a) Payment of Distributions . Subject to the rights of holders of Parity Preferred Units as to the payment of distributions, pursuant to Section 5.1 of the Partnership Agreement, holders of Series V Preferred Units shall be entitled to receive, when, as and if declared by the Partnership acting through the General Partner, the Priority Return. Such distributions shall be cumulative, shall accrue from the original date of issuance of the Series V Preferred Units and, notwithstanding Section 5.1 of the Partnership Agreement, will be payable (i) quarterly in arrears on March 31, June 30, September 30 and December 31 of each year commencing on June 30, 2013 and (ii) in the event of a redemption of Series V Preferred Units (each a “ Series V Preferred Unit Distribution Payment Date ”). If any date on which distributions are to be made on the Series V Preferred Units is not a Business Day (as defined below), then payment of the distribution to be made on such date will be made on the Business Day immediately preceding such date with the same force and effect as if made on such date. Distributions on the Series V Preferred Units will be made to the holders of record of the Series V Preferred Units on the relevant record dates to be fixed by the Partnership acting through the General Partner, which record dates shall in no event exceed fifteen (15) Business Days prior to the relevant Series V Preferred Unit Distribution Payment Date. Business Day shall be any day other than a Saturday, Sunday or day on which banking institutions in the State of New York or the State of California are authorized or obligated by law to close, or a day which is or is declared a national or a New York or California state holiday.

(b) Prohibition on Distribution . No distributions on Series V Preferred Units shall be authorized by the General Partner or paid or set apart for payment by the Partnership at any such time as the terms and provisions of any agreement of the Partnership or the General Partner, including any agreement relating to their indebtedness, prohibits such authorization, payment or setting apart for payment or provides that such authorization, payment or setting apart for payment would constitute a breach thereof or a default thereunder, or to the extent that such authorization or payment shall be restricted or prohibited by law.

(c) Distributions Cumulative . Distributions on the Series V Preferred Units will accrue whether or not the terms and provisions of any agreement of the Partnership, including any agreement relating to its indebtedness, at any time prohibit the current payment of distributions, whether or not the Partnership has earnings, whether or not there are funds legally available for the payment of such distributions and whether or not such distributions are authorized. Accrued but unpaid distributions on the Series V Preferred Units will accumulate as of the Series V Preferred Unit Distribution Payment Date on which they first become payable. Distributions on account of arrears for any past distribution periods may be declared and paid at any time, without reference to a regular Series V Preferred Unit Distribution Payment Date, to holders of record of the Series V Preferred Units on the record date fixed by the Partnership acting through the General Partner which date shall not exceed fifteen (15) Business Days prior to the payment date. Accumulated and unpaid distributions will not bear interest.

(d) Priority as to Distributions . Subject to the provisions of Article 13 of the Partnership Agreement:

(i) So long as any Series V Preferred Units are outstanding, no distribution of cash or other property shall be authorized, declared, paid or set apart for payment on or with respect to any class or series of Partnership Interests ranking junior as to the payment of distributions or rights upon a voluntary or involuntary liquidation, dissolution or winding-up of the Partnership to the Series V Preferred Units (collectively, “ Junior Units ”), nor shall any cash or other property be set aside for or applied to the purchase, redemption or other acquisition for consideration of any Series V Preferred Units, any Parity Preferred Units or any Junior Units, unless, in each case, all distributions accumulated on all Series V Preferred Units and all classes and series of outstanding Parity Preferred Units have been paid in full. The foregoing sentence shall not prohibit (x) distributions payable solely in Junior Units, or (y) the conversion of Junior Units or Parity Preferred Units into Partnership Interests ranking junior to the Series V Preferred Units.

(ii) So long as distributions have not been paid in full (or a sum sufficient for such full payment is not irrevocably deposited in trust for payment) upon the Series V Preferred Units, all distributions authorized and declared on the Series V Preferred Units and all classes or series of outstanding Parity Preferred Units shall be authorized and declared so that the amount of distributions authorized and declared per Series V Preferred Unit and such other classes or series of Parity Preferred Units shall in all cases bear to each other the same ratio that accrued distributions per Series V Preferred Unit and such other classes or series of Parity Preferred Units (which shall not include any accumulation in respect of unpaid distributions for prior distribution periods if such class or series of Parity Preferred Units do not have cumulative distribution rights) bear to each other.

(e) No Further Rights . Holders of Series V Preferred Units shall not be entitled to any distributions, whether payable in cash, other property or otherwise, in excess of the full cumulative distributions described herein.

Section 4. Allocations . Section 6.1(a)(ii) of the Partnership Agreement is amended to read, in its entirety, as follows:

“(ii) (A) Notwithstanding anything to the contrary contained in this Agreement, in any taxable year: (1) the holders of Series R, S, T, U and V Preferred Units shall be allocated an amount of gross income equal to the Priority Return distributed to such holders in such taxable year.

(B) After the Capital Account balances of all Partners other than holders of any series of Preferred Units have been reduced to zero, Losses of the Partnership that otherwise would be allocated so as to cause deficit Capital Account balances for those other Partners shall be allocated to the holders of the Series R, S, T, U and V Preferred Units in proportion to the positive balances of their Capital Accounts until those Capital Account balances have been reduced to zero. If Losses have been allocated to the holders of the Series R, S, T, U and V Preferred Units pursuant to the preceding sentence, the first subsequent Profits shall be allocated to those preferred partners so as to recoup, in reverse order, the effects of the loss allocations.

(C) Upon liquidation of the Partnership or the interest of the holders of Series R, S, T, U and V Preferred Units in the Partnership, items of gross income or deduction shall be allocated to the holders of Series R, S, T, U and V Preferred Units in a manner such that, immediately prior to such liquidation, the Capital Account balances of such holders shall equal the amount of their Liquidation Preferences.”

Section 5. Optional Redemption . The Series V Preferred Units shall be redeemed at the same time, to the same extent, and applying, except as set forth below, similar procedures, as any redemption by the General Partner of the Depositary Shares. The redemption price, payable in cash, shall equal the Liquidation Preference (the “ Series V Redemption Price ”). Unless otherwise agreed, the Partnership will deliver into escrow with an escrow agent acceptable to the Partnership and the holders of the Series V Preferred Units being redeemed (the “ Escrow Agent ”) the Series V Redemption Price and an executed Redemption Agreement, in substantially the form attached as Exhibit A (the “ Redemption Agreement ”), and an Amendment to the Agreement of Limited Partnership evidencing the Redemption, in substantially the form attached as Exhibit B . The holders of the Series V Preferred Units to be redeemed will also deliver into escrow with the Escrow Agent an executed Redemption Agreement and an executed Amendment to the Agreement of Limited Partnership evidencing the redemption. Upon delivery of all of the above-described items by both parties, on the redemption date the Escrow Agent shall release the Series V Redemption Price to the holders of the Series V Preferred Units and the fully-executed Redemption Agreement and Amendment to Agreement of Limited Partnership to both parties. On and after the date of redemption, distributions will cease to accumulate on the Series V Preferred Units called for redemption, unless the Partnership defaults in the payment of the Series V Redemption Price. The Redemption Right (as such term is defined in the Partnership Agreement) given to Limited Partners (as such term is defined in the Partnership Agreement) in Section 8.6 of the Partnership Agreement shall not be available to the holders of the Series V Preferred Units and all references to Limited Partners in said Section 8.6 (and related provisions of the Partnership Agreement) shall not include holders of the Series V Preferred Units.

Section 6. Voting Rights . Holders of the Series V Preferred Units will not have any voting rights or right to consent to any matter requiring the consent or approval of the Limited Partners, except as set forth in Section 14.1 of the Partnership Agreement and in this Section 6. Solely for purposes of Section 14.1 of the Partnership Agreement, each Series V Preferred Unit shall be treated as one Partnership Unit.

Section 7. Transfer Restrictions . The holders of Series V Preferred Units shall be subject to all of the provisions of Section 11 of the Partnership Agreement.

Section 8. No Conversion Rights . The holders of the Series V Preferred Units shall not have any rights to convert such units into shares of any other class or series of stock or into any other securities of, or interest in, the Partnership.

Section 9. No Sinking Fund . No sinking fund shall be established for the retirement or redemption of Series V Preferred Units.

Section 10. Exhibit A to Partnership Agreement . In order to duly reflect the issuance of the Series V Preferred Units provided for herein, the Partnership Agreement is hereby further amended pursuant to Section 12.3 of the Partnership Agreement by replacing the current form of Exhibit A to the Partnership Agreement with the form of Exhibit A that is attached to this Amendment as

Exhibit C .

Section 11. Inconsistent Provisions . Nothing to the contrary contained in the Partnership Agreement shall limit any of the rights or obligations set forth in this Amendment.

[The remainder of this page is intentionally left blank.]

IN WITNESS WHEREOF, this Amendment has been executed as of the date first above written.


PS BUSINESS PARKS, INC.

By:		/s/ Joseph D. Russell, Jr.
		Name: Joseph D. Russell, Jr.
		Title: President and Chief Executive Officer

Exhibit A

FORM OF

REDEMPTION AGREEMENT

THIS REDEMPTION AGREEMENT (the “Agreement”) is entered into effective as of the day of , , by and between (the “Retiring Partner”), and PS Business Parks, L.P., a California limited partnership (the “Partnership”).

RECITALS:

WHEREAS, the Agreement of Limited Partnership of the Partnership, dated as of March 17, 1998, as amended, was amended by an Amendment to Agreement of Limited Partnership Relating to 5.70% Series V Cumulative Redeemable Preferred Units (the “Amendment”), as further amended from time to time;

WHEREAS, the Retiring Partner owns of the 5.70% Series V Cumulative Redeemable Preferred Units in the Partnership (the “Series V Preferred Units”); and

WHEREAS, the Partnership desires to redeem the Series V Preferred Units of the Retiring Partner, and the Retiring Partner desires to liquidate its Series V Preferred Units (the “Redemption”) pursuant to the Amendment and based on the representations and under the terms and conditions set forth below;

NOW, THEREFORE, in consideration of the mutual covenants, representations and agreements herein contained, the parties hereto, intending to be legally bound, do covenant and agree as follows:

1. Liquidation of Retiring Partner . In satisfaction of the terms and conditions set forth herein and in the Amendment, the Retiring Partner’s Series V Preferred Units are hereby completely liquidated and the Retiring Partner immediately and automatically ceases to be a limited partner in the Partnership in exchange for the payment of the Series V Redemption Price (as defined in the Amendment and in accordance with the provisions set forth in the Amendment) and for other good and valuable consideration.

2. Representations of Retiring Partner . The Retiring Partner represents and warrants to the Partnership that:

(a) The Retiring Partner is duly organized and validly existing under the laws of the State of and has been duly authorized by all necessary and appropriate [limited liability company] [corporate] [partnership] action to enter into this Agreement and to consummate the transactions contemplated herein. This Agreement is a valid and binding obligation of the Retiring Partner, enforceable against the Retiring Partner in accordance with its terms, except insofar as such enforceability may be affected by bankruptcy, insolvency or similar laws affecting creditor’s rights generally and the availability of any particular equitable remedy.

(b) The Retiring Partner has not sold, assigned or otherwise disposed of all or any portion of the Series V Preferred Units and the Series V Preferred Units are free of any liens, security interests, encumbrances or other restrictions, whether existing of record or otherwise.

(c) The execution of this Agreement by the Retiring Partner and the performance of its obligations hereunder will not violate any contract, mortgage, indenture, or other similar restriction to which the Retiring Partner is a party or by which its assets are bound.

(d) Neither the execution nor the delivery of this Agreement nor the consummation of the transactions contemplated herein nor fulfillment of or compliance with the terms and conditions hereof (a) conflict with or will result in a breach of any of the terms, conditions or provisions of (i) the organizational and governing documents of the Retiring Partner or (ii) any agreement, order, judgment, decree, arbitration award, statute, regulation or instrument to which the Retiring Partner is a party or by which it or its assets are bound, or (b) constitutes or will constitute a breach, violation or default under any of the foregoing. No consent or approval, authorization, order, regulation or qualification of any governmental entity or any other person is required for the execution and delivery of this Agreement and the consummation of the transactions contemplated hereby by the Retiring Partner.

3. Representations and Warranties of the Partnership . The Partnership represents and warrants to the Retiring Partner as follows:

(a) The Partnership is duly organized and validly existing under the laws of the State of California and has been duly authorized by all necessary and appropriate partnership action to enter into this Agreement and to consummate the transactions contemplated herein. This Agreement is a valid and binding obligation of the Partnership enforceable in accordance with its terms, except as such enforcement may be limited by bankruptcy, insolvency, reorganization, moratorium or similar laws affecting the enforcement of creditors’ rights generally.

(b) The execution of this Agreement by the Partnership and the performance of its obligations hereunder will not violate any contract, mortgage, indenture, or other similar restriction to which the Partnership is a party or by which the Partnership is bound.

(c) Neither the execution nor the delivery of this Agreement nor the consummation of the transactions contemplated herein nor fulfillment of or compliance with the terms and conditions hereof (a) conflict with or will result in a breach of any of the terms, conditions or provisions of (i) the organizational and governing documents of the Partnership or (ii) any agreement, order, judgment, decree, arbitration award, statute, regulation or instrument to which the Partnership is a party or by which it or its assets are bound, or (b) constitutes or will constitute a breach, violation or default under any of the foregoing. No consent or approval, authorization, order, regulation or qualification of any governmental entity or any other person is required for the execution and delivery of this Agreement and the consummation of the transactions contemplated hereby by the Partnership.

(d) Consummation of the Redemption by the Partnership will not render the Partnership insolvent under California partnership law.

4. Indemnification .

(a) The Retiring Partner covenants and agrees to indemnify the Partnership and hold it harmless against and with respect to any and all damage, loss, liability, deficiency, cost and expense, including reasonable attorneys’ fees, (i) resulting from any misrepresentation, breach of warranty or non-fulfillment of any agreement or covenant on the part of the Retiring Partner under this Agreement, and (ii) from any and all actions, suits, proceedings, demands, assessments, judgments, costs and legal and other expenses incident to any of the foregoing.

(b) The Partnership covenants and agrees to indemnify the Retiring Partner and hold it harmless against and with respect to any and all damage, loss, liability, deficiency, cost and expense, including reasonable attorneys’ fees, (i) resulting from any misrepresentation, breach of warranty or non-fulfillment of any agreement or covenant on the part of such Partnership under this Agreement and (ii) from any and all actions, suits, proceedings, demands, assessments, judgments, costs and legal and other expenses incident to any of the foregoing.

5. Survival of Representations and Warranties . All representations, warranties, covenants and agreements of any of the parties hereto made in this Agreement shall survive the execution and delivery hereof, the closing hereunder, and the execution and delivery of all instruments and documents executed in connection therewith.

6. Integration, Interpretation and Miscellaneous . This Agreement sets forth the entire understanding of the parties hereto with respect to the subject matter herein and it shall not be changed or terminated orally. This Agreement shall be construed in accordance with the laws of the State of California. This Agreement may be executed simultaneously in two or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument. This Agreement shall be binding upon and inure to the benefit of the parties hereto and their respective heirs, personal representatives, and successors, or successors and assigns, as the case may be. The headings in this Agreement are for reference purposes only and shall not affect the meaning or interpretation of this Agreement.

IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the day and year first above written.


RETIRING PARTNER:

By:
		Name:
		Title:

PARTNERSHIP:

PS Business Parks, L.P.

By:

PS Business Parks, Inc., its

General Partner


		By:
				Name:
				Title:

Exhibit B

FORM OF

AMENDMENT TO

AGREEMENT OF LIMITED PARTNERSHIP

PS BUSINESS PARKS, L.P.

This Amendment to Agreement of Limited Partnership of PS Business Parks, L.P. (the “Partnership” ), dated as of (this “Amendment” ) is entered into by the General Partner of the Partnership, PS Business Parks, Inc., and , as a withdrawing Limited Partner of the Partnership (the “Withdrawing Partner” ).

RECITALS:

WHEREAS, capitalized terms used herein, unless otherwise defined, have the meanings assigned to such terms in the Agreement of Limited Partnership of the Partnership entered into as of March 17, 1998, as amended (the “Partnership Agreement” ).

WHEREAS, pursuant to the redemption by the Partnership of the 5.70% Series V Cumulative Redeemable Preferred Units pursuant to the terms and conditions set forth in that certain Redemption Agreement by and between the Partnership and the Withdrawing Partner, dated as of , 20 , 5.70% Series V Cumulative Redeemable Preferred Units of the Withdrawing Partner have been redeemed by the Partnership and the General Partner desires to amend the Partnership Agreement to (a) set forth a revised list of all Partners of the Partnership as of the date hereof and (b) reflect the withdrawal of the Withdrawing Partner from the Partnership.

NOW, THEREFORE, in consideration of the mutual covenants and agreements contained herein, the parties hereby agree as follows:

1. This Amendment shall be deemed effective as of the date first above written. Except as amended hereby, the Partnership Agreement shall remain in full force and effect and shall be otherwise unaffected hereby.

2. To evidence the redemption of the 5.70% Series V Cumulative Redeemable Preferred Units of the Withdrawing Partner and the withdrawal of the Withdrawing Partner as a Limited Partner of the Partnership, attached as Schedule A is a current list of Partners of the Partnership as of the date hereof.

3. The Withdrawing Partner is entering into this Amendment to evidence its withdrawal as a Limited Partner of the Partnership.

4. This Amendment shall be deemed to be a contract made under the laws of the State of California and for all purposes shall be governed by and construed in accordance with the laws of such state.

IN WITNESS WHEREOF, the undersigned has caused this Amendment to be executed and delivered as of the date first above written.


GENERAL PARTNER PS Business Parks, Inc.

By:
		Name:
		Title:


WITHDRAWING LIMITED PARTNER

By:
		Name:
		Title:

Exhibit C

Revised Exhibit A to the Partnership Agreement

Please see attached.

[Attach revised Exhibit A to the Partnership Agreement]

EXHIBIT C (March 14, 2013)


Name of Partner (Date of Admission)	Address	Agreed Value of Contributed Property (1)		Partnership Units		Percentage Interest
General Partner:
Total Common Shares		$	560,689,000		24,247,428		76.85	%
Total Common Units		$	121,890,000		7,305,355		23.15	%

TOTAL (General & Limited Partners; not Preferred Units)		$	682,579,000		31,552,783		100.00	%
Limited Partners (Series R Preferred Units):
PS Business Parks, Inc. (October 15, 2010)	701 Western Avenue Glendale, CA 91201		75,000,000		3,000,000		7.54	%
Limited Partners (Series S Preferred Units):
PS Business Parks, Inc. (January 18, 2012)	701 Western Avenue Glendale, CA 91201		230,000,000		9,200,000		23.12	%
Limited Partners (Series T Preferred Units):
PS Business Parks, Inc. (May 14, 2012)	701 Western Avenue Glendale, CA 91201		350,000,000		14,000,000		35.18	%
Limited Partners (Series U Preferred Units):
PS Business Parks, Inc. (September 14, 2012)	701 Western Avenue Glendale, CA 91201		230,000,000		9,200,000		23.12	%
Limited Partners (Series V Preferred Units):
PS Business Parks, Inc. (March 14, 2013)	701 Western Avenue Glendale, CA 91201		110,000,000		4,400,000		11.06	%

TOTAL (Preferred Stock & Units)		$	995,000,000	$	39,800,000		100.00	%

(1)	Agreed value is the agreed gross value of the property at the time of contribution less any liabilities to which the property is subject at that time.

PS BUSINESS PARKS, INC.

EXHIBIT 12

STATEMENT RE: COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

(Unaudited, in thousands, except ratio data)


	For the Three Months Ended March 31,
	2013		2012
Income from continuing operations	$	24,989	$	21,906
Interest expense		4,539		5,348

Earnings from continuing operations available to cover fixed charges	$	29,528	$	27,254

Fixed charges ⁽¹⁾	$	4,539	$	5,348
Preferred stock dividends		13,850		17,186
Preferred partnership distributions		—		99

Combined fixed charges and preferred distributions	$	18,389	$	22,633

Ratio of earnings from continuing operations to fixed charges		6.5		5.1

Ratio of earnings from continuing operations to combined fixed charges and preferred distributions		1.6		1.2


	For the Years Ended December 31,
	2012		2011			2010		2009			2008
Income from continuing operations	$	94,395	$	99,563		$	96,394	$	91,368		$	84,106
Interest expense		20,618		5,455			3,534		3,552			3,952

Earnings from continuing operations available to cover fixed charges	$	115,013	$	105,018		$	99,928	$	94,920		$	88,058

Fixed charges ⁽¹⁾	$	20,618	$	5,455		$	3,534	$	3,552		$	3,952
Preferred stock dividends		69,136		41,799			46,214		17,440			46,630
Preferred partnership distributions		323		(6,991	)		5,103		(2,569	)		7,007

Combined fixed charges and preferred distributions	$	90,077	$	40,263		$	54,851	$	18,423		$	57,589

Ratio of earnings from continuing operations to fixed charges		5.6		19.3			28.3		26.7			22.3

Ratio of earnings from continuing operations to combined fixed charges and preferred distributions		1.3		2.6			1.8		5.2			1.5

⁽¹⁾	Fixed charges include interest expense.

PS BUSINESS PARKS, INC.

EXHIBIT 12

STATEMENT RE: COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

(Unaudited, in thousands, except ratio data)

Supplemental Disclosure of Ratio of Funds from Operations (“FFO”) to Fixed Charges:


	For the Three Months Ended March 31,
	2013		2012
FFO	$	38,100	$	31,859
Interest expense		4,539		5,348
Net income allocable to noncontrolling interests — preferred units		—		99
Preferred stock dividends		13,850		17,186

FFO available to cover fixed charges	$	56,489	$	54,492

Fixed charges ⁽¹⁾	$	4,539	$	5,348
Preferred stock dividends ⁽²⁾		13,850		11,926
Preferred partnership distributions ⁽²⁾		—		99

Combined fixed charges and preferred distributions paid	$	18,389	$	17,373

Ratio of adjusted FFO to fixed charges		12.4		10.2

Ratio of adjusted FFO to combined fixed charges and preferred distributions paid		3.1		3.1


	For the Years Ended December 31,
	2012		2011			2010		2009			2008
FFO	$	134,472	$	149,797		$	124,420	$	163,074		$	131,558
Interest expense		20,618		5,455			3,534		3,552			3,952
Net income allocable to noncontrolling interests — preferred units		323		(6,991	)		5,103		(2,569	)		7,007
Preferred stock dividends		69,136		41,799			46,214		17,440			46,630

FFO available to cover fixed charges	$	224,549	$	190,060		$	179,271	$	181,497		$	189,147

Fixed charges ⁽¹⁾	$	20,618	$	5,455		$	3,534	$	3,552		$	3,952
Preferred stock dividends ⁽²⁾		51,969		41,799			42,730		44,662			50,858
Preferred partnership distributions ⁽²⁾		174		398			4,521		5,848			7,007

Combined fixed charges and preferred distributions paid	$	72,761	$	47,652		$	50,785	$	54,062		$	61,817

Ratio of adjusted FFO to fixed charges		10.9		34.8			50.7		51.1			47.9

Ratio of adjusted FFO to combined fixed charges and preferred distributions paid		3.1		4.0			3.5		3.4			3.1

⁽¹⁾	Fixed charges include interest expense.

⁽²⁾	Excludes the issuance costs related to the redemption/repurchase of preferred equity and the gain on the repurchase of preferred equity.

Exhibit 31.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Joseph D. Russell, Jr., certify that:

1.	I have reviewed this quarterly report on Form 10-Q of PS Business Parks, Inc.;

2.	Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.	Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)

Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)

Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)

Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)

Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.	The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)

All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)

Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

/s/ Joseph D. Russell, Jr.

Name: Joseph D. Russell, Jr.

Title: Chief Executive Officer

Date: May 9, 2013

Exhibit 31.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Edward A. Stokx, certify that:

1.	I have reviewed this quarterly report on Form 10-Q of PS Business Parks, Inc.;

2.	Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.	Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

(a)

(b)

(c)

(d)

5.	The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)

(b)

Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

/s/ Edward A. Stokx

Name: Edward A. Stokx

Title: Chief Financial Officer

Date: May 9, 2013

Exhibit 32.1

Certification of CEO and CFO Pursuant to

18 U.S.C. Section 1350,

as Adopted Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report on Form 10-Q of PS Business Parks, Inc. (the “Company”) for the period ending March 31, 2013 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), Joseph D. Russell Jr., as Chief Executive Officer of the Company, and Edward A. Stokx, as Chief Financial Officer of the Company, each hereby certifies, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that, to his knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Joseph D. Russell, Jr.

Name: Joseph D. Russell, Jr.

Title: Chief Executive Officer

Date: May 9, 2013

/s/ Edward A. Stokx

Name: Edward A. Stokx

Title: Chief Financial Officer

Date: May 9, 2013

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