Exhibit 1.1

EXECUTION VERSION

$350,000,000

COLUMBIA PROPERTY TRUST OPERATING PARTNERSHIP, L.P.

3.650% Senior Notes due 2026

Underwriting Agreement

August 3, 2016

J.P. Morgan Securities LLC

383 Madison Avenue

New York, New York 10179

Morgan Stanley & Co. LLC

1585 Broadway

New York, New York 10036

Wells Fargo Securities, LLC

550 South Tryon Street

Charlotte, North Carolina 28202

As Representatives of the

several Underwriters listed

in Schedule 1 hereto

Ladies and Gentlemen:

Columbia Property Trust Operating Partnership, L.P., a Delaware limited partnership (the “Company”), proposes to issue and sell to the several Underwriters listed in Schedule 1 hereto (the “Underwriters”), for whom you are acting as Representatives (the “Representatives”), $350,000,000 principal amount of its 3.650% Senior Notes due 2026 (the “Securities”). The Securities will be issued pursuant to an Indenture (the “Base Indenture”) dated as of March 12, 2015 among the Company, Columbia Property Trust, Inc., a Maryland corporation (the “Parent”) and U.S. Bank National Association, as trustee (the “Trustee”), as amended by a Supplemental Indenture (the “Supplemental Indenture” and, together with the Base Indenture, the “Indenture”) to be dated as of the Closing Date (as defined below), and will be initially guaranteed on an unsecured senior basis by the Parent (the “Guarantee”).

The Company and the Parent hereby confirm their agreement with the several Underwriters concerning the purchase and sale of the Securities, as follows:

1. Registration Statement . The Company has prepared and filed with the Securities and Exchange Commission (the “Commission”) under the Securities Act of

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1933, as amended, and the rules and regulations of the Commission thereunder (collectively, the “Securities Act”), a registration statement on Form S-3 (File No. 333-198764), including a prospectus, relating to the Securities. Such registration statement, as amended at the time it became effective, including the information, if any, deemed pursuant to Rule 430A, 430B or 430C under the Securities Act to be part of the registration statement at the time of its effectiveness (“Rule 430 Information”), is referred to herein as the “Registration Statement”; and as used herein, the term “Preliminary Prospectus” means each prospectus included in such registration statement (and any amendments thereto) before it became effective, any prospectus filed with the Commission pursuant to Rule 424(a) under the Securities Act and the prospectus included in the Registration Statement at the time of its effectiveness that omits Rule 430 Information, and the term “Prospectus” means the prospectus in the form first used (or made available upon request of purchasers pursuant to Rule 173 under the Securities Act) in connection with confirmation of sales of the Securities. Any reference in this Agreement to the Registration Statement, any Preliminary Prospectus or the Prospectus shall be deemed to refer to and include the documents incorporated by reference therein pursuant to Item 12 of Form S-3 under the Securities Act, as of the effective date of the Registration Statement or the date of such Preliminary Prospectus or the Prospectus, as the case may be and any reference to “amend”, “amendment” or “supplement” with respect to the Registration Statement, any Preliminary Prospectus or the Prospectus shall be deemed to refer to and include any documents filed after such date under the Securities Exchange Act of 1934, as amended, and the rules and regulations of the Commission thereunder (collectively, the “Exchange Act”) that are deemed to be incorporated by reference therein. Capitalized terms used but not defined herein shall have the meanings given to such terms in the Registration Statement and the Prospectus.

At or prior to the time when sales of the Securities were first made (the “Time of Sale”), the following information shall have been prepared (collectively, the “Time of Sale Information”): a Preliminary Prospectus dated August 3, 2016, and each “free-writing prospectus” (as defined pursuant to Rule 405 under the Securities Act) listed on Annex A hereto.

The Company hereby confirms its agreement with the several Underwriters concerning the purchase and resale of the Securities, as follows:

2. Purchase of the Securities by the Underwriters .

(a) The Company agrees to issue and sell the Securities to the several Underwriters as provided in this Agreement, and each Underwriter, on the basis of the representations, warranties and agreements set forth herein and subject to the conditions set forth herein, agrees, severally and not jointly, to purchase from the Company the respective principal amount of Securities set forth opposite such Underwriter’s name in Schedule 1 hereto at a price equal to 98.976% of the principal

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amount thereof plus accrued interest, if any, from August 12, 2016 to the Closing Date. The Company will not be obligated to deliver any of the Securities except upon payment for all the Securities to be purchased as provided herein.

(b) The Company understands that the Underwriters intend to make a public offering of the Securities as soon after the effectiveness of this Agreement as in the judgment of the Representatives is advisable, and initially to offer the Securities on the terms set forth in the Time of Sale Information. The Company acknowledges and agrees that the Underwriters may offer and sell Securities to or through any affiliate of an Underwriter and that any such affiliate may offer and sell Securities purchased by it to or through any Underwriter.

(c) The Company acknowledges and agrees that the Underwriters may offer and sell Securities to or through any affiliate of an Underwriter and that any such affiliate may offer and sell Securities purchased by it to or through any Underwriter, in which case each Underwriter shall cause its affiliates to comply with applicable securities laws.

(d) Payment for and delivery of the Securities will be made at the offices of Davis Polk & Wardwell LLP at 10:00 A.M., New York City time, on August 12, 2016, or at such other time or place on the same or such other date, not later than the fifth business day thereafter, as the Representatives and the Company may agree upon in writing. The time and date of such payment and delivery is referred to herein as the “Closing Date”.

(e) Payment for the Securities shall be made by wire transfer in immediately available funds to the account(s) specified by the Company to the Representatives against delivery to the nominee of The Depository Trust Company (“DTC”), for the account of the Underwriters, of one or more global notes representing the Securities (collectively, the “Global Note”), with any transfer taxes payable in connection with the sale of the Securities duly paid by the Company. The Global Note will be made available for inspection by the Representatives not later than 1:00 P.M., New York City time, on the business day prior to the Closing Date.

(f) The Company and the Parent acknowledge and agree that the Underwriters are acting solely in the capacity of an arm’s length contractual counterparty to the Company and the Parent with respect to the offering of Securities contemplated hereby (including in connection with determining the terms of the offering) and not as financial advisors or fiduciaries to, or agents of, the Company, the Parent or any other person. Additionally, neither the Representatives nor the other Underwriters are advising the Company, the Parent or any other person as to any legal, tax, investment, accounting or regulatory matters in any jurisdiction. The Company and the Parent shall consult with their own advisors concerning such matters and shall be responsible for making their own independent investigation and appraisal of the

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transactions contemplated hereby, and neither the Representatives nor the other Underwriters shall have any responsibility or liability to the Company or the Parent with respect thereto. Any review by the Representatives or the other Underwriters of the Company, the Parent and the transactions contemplated hereby or other matters relating to such transactions will be performed solely for the benefit of the Representatives or such other Underwriters, as the case may be, and shall not be on behalf of the Company, the Parent or any other person.

3. Representations and Warranties of the Company and the Parent . The Company and the Parent jointly and severally represent and warrant to each Underwriter that:

(a) Preliminary Prospectus. No order preventing or suspending the use of any Preliminary Prospectus has been issued by the Commission, and each Preliminary Prospectus, at the time of filing thereof, complied in all material respects with the Securities Act and did not contain any untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided that the Company and the Parent make no representation or warranty with respect to any statements or omissions made in reliance upon and in conformity with information relating to any Underwriter furnished to the Company in writing by such Underwriter through the Representatives expressly for use in any Preliminary Prospectus.

(b) Time of Sale Information and Prospectus. The Preliminary Prospectus, as of its date, did not, the Time of Sale Information, at the Time of Sale, did not, and at the Closing Date, will not, and the Prospectus, in the form first used by the Underwriters to confirm sales of the Securities and as of the Closing Date, will not, contain any untrue statement of a material fact or omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided that the Company and the Parent make no representation or warranty with respect to any statements or omissions made in reliance upon and in conformity with information relating to any Underwriter furnished to the Company in writing by such Underwriter through the Representatives expressly for use in the Preliminary Prospectus, the Time of Sale Information or the Prospectus.

(c) Issuer Free Writing Prospectus . The Company and the Parent (including their agents and Representatives, other than the Underwriters in their capacity as such) have not prepared, made, used, authorized, approved or referred to and will not prepare, make, use, authorize, approve or refer to any “written communication” (as defined in Rule 405 under the Securities Act) that constitutes an offer to sell or solicitation of an offer to buy the Securities (each such communication by the Company,

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the Parent or their agents and Representatives (other than a communication referred to in clauses (i), (ii) and (iii) below) an “Issuer Free Writing Prospectus”) other than (i) any document not constituting a prospectus pursuant to Section 2(a)(10)(a) of the Securities Act or Rule 134 under the Securities Act, (ii) the Preliminary Prospectus, (iii) the Prospectus, (iv) the documents listed on Annex A hereto, including a term sheet substantially in the form of Annex B hereto as constituting part of the Time of Sale Information, and (v) any electronic road show or other written communications, in each case used in accordance with Section 4(d). Each such Issuer Free Writing Prospectus complies in all material respects with the Securities Act, has been or will be (within the time period specified in Rule 433) filed in accordance with the Securities Act (to the extent required thereby) and, when taken together with the Preliminary Prospectus filed prior to the first use of such Issuer Free Writing Prospectus, did not at the Time of Sale, and at the Closing Date will not, contain any untrue statement of a material fact or omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided that the Company and the Parent make no representation and warranty with respect to any statements or omissions made in each such Issuer Free Writing Prospectus in reliance upon and in conformity with information relating to any Underwriter furnished to the Company in writing by such Underwriter through the Representatives expressly for use in any Issuer Free Writing Prospectus.

(d) Registration Statement and Prospectus. The Registration Statement is an “automatic shelf registration statement” as defined under Rule 405 of the Securities Act that has been filed with the Commission not earlier than three years prior to the date hereof; and no notice of objection of the Commission to the use of such registration statement or any post-effective amendment thereto pursuant to Rule 401(g)(2) under the Securities Act has been received by the Company. No order suspending the effectiveness of the Registration Statement has been issued by the Commission and no proceeding for that purpose or pursuant to Section 8A of the Securities Act against the Company or related to the offering has been initiated or threatened by the Commission; as of the applicable effective date of the Registration Statement and any amendment thereto, the Registration Statement complied and will comply in all material respects with the Securities Act and the Trust Indenture Act of 1939, as amended, and the rules and regulations of the Commission thereunder (collectively, the “ Trust Indenture Act ”), and did not and will not contain any untrue statement of a material fact or omit to state a material fact or necessary in order to make the statements therein not misleading; and as of the date of the Prospectus and any amendment or supplement thereto and as of the Closing Date, the Prospectus will not contain any untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided that the Company makes no representation or warranty with respect to (i) that part of the Registration Statement that constitutes the Statement of Eligibility and Qualification (Form T-1) of the Trustee under the Trust Indenture Act or

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(ii) any statements or omissions made in reliance upon and in conformity with information relating to any Underwriter furnished to the Company in writing by such Underwriter through the Representatives expressly for use in the Registration Statement and the Prospectus and any amendment or supplement thereto.

(e) Incorporated Documents. The documents incorporated by reference in each of the Registration Statement, the Prospectus and the Time of Sale Information, when filed with the Commission, conformed or will conform, as the case may be, in all material respects to the requirements of the Exchange Act and the rules and regulations of the Commission thereunder, and did not and will not contain any untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading.

(f) Financial Statements. The financial statements and the related notes thereto included or incorporated by reference in each of the Registration Statement, the Time of Sale Information and the Prospectus comply, in all material respects, with the applicable requirements of the Securities Act and the Exchange Act and the rules and regulations of the Commission thereunder, as applicable, and present fairly, in all material respects, the consolidated financial position of the Parent and its subsidiaries as of the dates indicated and the results of their operations and the changes in their cash flows for the periods specified; such financial statements have been prepared in conformity with generally accepted accounting principles applied on a consistent basis throughout the periods covered thereby, and the supporting schedules included or incorporated by reference in each of the Registration Statement, the Prospectus and the Time of Sale Information present fairly the information required to be stated therein (except as otherwise noted therein); and the other financial information included or incorporated by reference in each of the Registration Statement, the Time of Sale Information and the Prospectus has been derived from the accounting records of the Parent and its subsidiaries and presents fairly in all material respects the information shown thereby. The interactive data in eXtensbile Business Reporting Language included or incorporated by reference in the Registration Statement, the Prospectus and the Time of Sale Information fairly presents the information called for in all material respects and is prepared in accordance with the Commission’s rules and guidelines applicable thereto.

(g) No Material Adverse Change. Since the date of the most recent financial statements of the Parent included or incorporated by reference in each of the Registration Statement, the Time of Sale Information and the Prospectus (i) there has not been any change in the capital stock or long-term debt of the Parent or any of its subsidiaries, or any dividend or distribution of any kind declared, set aside for payment, paid or made by the Parent on any class of capital stock, or any material adverse change, or any development involving a prospective material adverse change, in or

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affecting the business, properties, management, financial position, results of operations or prospects of the Parent and its subsidiaries taken as a whole; (ii) neither the Parent nor any of its subsidiaries has entered into any transaction or agreement (other than in the ordinary course of business) that is material to the Parent and its subsidiaries taken as a whole or incurred any liability or obligation, direct or contingent, that is material to the Parent and its subsidiaries taken as a whole; and (iii) neither the Parent nor any of its subsidiaries has sustained any material loss or interference with its business from fire, explosion, flood or other calamity, whether or not covered by insurance, or from any labor disturbance or dispute or any action, order or decree of any court or arbitrator or governmental or regulatory authority, except in the case of clauses (i), (ii) and (iii) above, as otherwise disclosed in the Registration Statement, the Time of Sale Information or in the Prospectus.

(h) Organization and Good Standing. The Company and the Parent have been duly organized and are validly existing and in good standing under the laws of their respective jurisdictions of organization, are duly qualified to do business and are in good standing in each jurisdiction in which their respective ownership or lease of property or the conduct of their respective businesses requires such qualification, and have all power and authority necessary to own or hold their respective properties and to conduct the businesses in which they are engaged, except where the failure to be so qualified, in good standing or have such power or authority would not, individually or in the aggregate, have a material adverse effect on the business, properties, management, financial position or results of operations of the Parent and its subsidiaries taken as a whole or on the performance by the Company and the Parent of their respective obligations under the Securities and the Guarantee (a “Material Adverse Effect”). The Parent does not own or control, directly or indirectly, any corporation, association or other entity other than the subsidiaries listed in Exhibit 21.1 to the Parent’s annual report on Form 10-K for the fiscal year ended December 31, 2015, except for entities that have been omitted pursuant to Item 601(b)(21) of Regulation S-K.

(i) Capitalization. The Parent has an authorized capitalization as set forth in each of the Registration Statement, the Time of Sale Information and the Prospectus under the heading “Capitalization”; and all the outstanding shares of capital stock or other equity interests of each subsidiary of the Parent (other than any equity interests in a joint venture) have been duly and validly authorized and issued, are fully paid and non-assessable and are owned directly or indirectly by the Parent, free and clear of any lien, charge, encumbrance, security interest, restriction on voting or transfer or any other claim of any third party (other than liens, charges, encumbrances, security interests or other claims to secure indebtedness and liabilities that exist under the Parent’s existing debt facilities).

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(j) Due Authorization. The Company and the Parent have full right, power and authority to execute and deliver this Agreement, the Securities and the Indenture, including the Guarantee set forth therein (collectively, the “Transaction Documents”), as applicable, and to perform their respective obligations hereunder and thereunder; and all action required to be taken for the due and proper authorization, execution and delivery of each of the Transaction Documents and the consummation of the transactions contemplated thereby has been duly and validly taken.

(k) The Indenture . The Base Indenture has been duly authorized, executed and delivered by the Company and the Parent and, assuming the due authorization, execution and delivery of the Base Indenture by the Trustee, the Base Indenture constitutes a valid and legally binding agreement of the Company and the Parent enforceable against the Company and the Parent in accordance with its terms, except as enforceability may be limited by applicable bankruptcy, insolvency or similar laws affecting the enforcement of creditors’ rights generally or by equitable principles relating to enforceability (collectively, the “Enforceability Exceptions”); the Supplemental Indenture has been duly authorized by the Company and the Parent, and, when duly executed and delivered in accordance with its terms by each of the parties thereto, the Supplemental Indenture will constitute a valid and legally binding agreement of the Company and the Parent enforceable against the Company and the Parent in accordance with its terms, subject to the Enforceability Exceptions; the Base Indenture was duly qualified under the Trust Indenture Act; and on the Closing Date, the Indenture will conform in all material respects to the requirements of the Trust Indenture Act and the rules and regulations of the Commission applicable to an indenture that is qualified thereunder.

(l) The Securities and the Guarantee . The Securities have been duly authorized by the Company and, when duly executed, authenticated, issued and delivered as provided in the Indenture and paid for as provided herein, will be duly and validly issued and outstanding and will constitute valid and legally binding obligations of the Company enforceable against the Company in accordance with their terms, subject to the Enforceability Exceptions, and will be entitled to the benefits of the Indenture; and the Guarantee has been duly authorized by the Parent and, when the Securities have been duly executed, authenticated, issued and delivered as provided in the Indenture and paid for as provided herein, will be a valid and legally binding obligation of the Parent, enforceable against the Parent in accordance with its terms, subject to the Enforceability Exceptions, and will be entitled to the benefits of the Indenture.

(m) Underwriting Agreement. This Agreement has been duly authorized, executed and delivered by the Company and the Parent, and, when duly executed and delivered in accordance with its terms by each of the parties thereto, will constitute a valid and legally binding agreement of the Company and the Parent enforceable against the Company and the Parent in accordance with its terms, subject to the Enforceability Exceptions, and except that rights to indemnity and contribution thereunder may be limited by applicable law and public policy.

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(n) Descriptions of the Transaction Documents . Each Transaction Document conforms in all material respects to the description thereof contained in each of the Registration Statement, the Time of Sale Information and the Prospectus.

(o) No Violation or Default. Neither the Parent nor any of its subsidiaries is (i) in violation of its charter or by-laws or similar organizational documents; (ii) in default, and no event has occurred that, with notice or lapse of time or both, would constitute such a default, in the due performance or observance of any term, covenant or condition contained in any indenture, mortgage, deed of trust, loan agreement or other agreement or instrument to which the Parent or any of its subsidiaries is a party or by which the Parent or any of its subsidiaries is bound or to which any of the property or assets of the Parent or any of its subsidiaries is subject; or (iii) in violation of any law or statute or any judgment, order, rule or regulation of any court or arbitrator or governmental or regulatory authority, except, in the case of clauses (ii) and (iii) above, for any such default or violation that would not, individually or in the aggregate, have a Material Adverse Effect.

(p) No Conflicts. The execution, delivery and performance by the Company and the Parent of each of the Transaction Documents to which it is a party, the issuance and sale of the Securities (including the Guarantee) and compliance by the Company and the Parent with the terms thereof and the consummation of the transactions contemplated by the Transaction Documents will not (i) conflict with or result in a breach or violation of any of the terms or provisions of, or constitute a default under, or result in the creation or imposition of any lien, charge or encumbrance upon any property or assets of the Parent or any of its subsidiaries pursuant to, any indenture, mortgage, deed of trust, loan agreement or other agreement or instrument to which the Parent or any of its subsidiaries is a party or by which the Parent or any of its subsidiaries is bound or to which any of the property or assets of the Parent or any of its subsidiaries is subject, (ii) result in any violation of the provisions of the charter or by-laws or similar organizational documents of the Parent or any of its subsidiaries or (iii) assuming the accuracy of the representations made herein by the Underwriters, result in the violation of any law or statute or any judgment, order, rule or regulation of any court or arbitrator or governmental or regulatory authority, except, in the case of clauses (i) and (iii) above, for any such conflict, breach, violation or default that would not, individually or in the aggregate, have a Material Adverse Effect.

(q) No Consents Required . No consent, approval, authorization, order, registration or qualification of or with any court or arbitrator or governmental or regulatory authority is required for the execution, delivery and performance by the Company and the Parent of each of the Transaction Documents to which each is a party, the issuance and sale of the Securities (including the Guarantee) and compliance by the Company and the

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Parent with the terms thereof and the consummation of the transactions contemplated by the Transaction Documents, except for such consents, approvals, authorizations, orders and registrations or qualifications (i) as may be required under applicable state securities laws in connection with the purchase and resale of the Securities by the Underwriters or (ii) which have been obtained prior to the Closing Date.

(r) Legal Proceedings. Except as described in each of the Registration Statement, the Time of Sale Information and the Prospectus, there are no legal, governmental or regulatory investigations, actions, suits or proceedings pending to which the Parent or any of its subsidiaries is or may be a party or to which any property of the Parent or any of its subsidiaries is or may be the subject that, individually or in the aggregate, if determined adversely to the Parent or any of its subsidiaries, could reasonably be expected to have a Material Adverse Effect; to the knowledge of the Company and the Parent, no such investigations, actions, suits or proceedings are threatened or contemplated by any governmental or regulatory authority or by others; and (i) there are no such current or pending actions that are required under the Securities Act to be described in the Registration Statement, the Time of Sale Information or the Prospectus that are not so described in the Registration Statement, the Time of Sale Information and the Prospectus and (ii) there are no statutes, regulations or contracts or other documents that are required under the Securities Act to be filed as exhibits to the Registration Statement or described in the Registration Statement, the Time of Sale Information and the Prospectus that are not so filed as exhibits to the Registration Statement or described in the Registration Statement, the Time of Sale Information and the Prospectus.

(s) Independent Accountants. Deloitte & Touche LLP has certified certain financial statements of the Parent and its subsidiaries included or incorporated by reference in the Registration Statement, the Time of Sale Information and the Prospectus and is an independent public accountant with respect to the Parent and its subsidiaries within the applicable rules and regulations adopted by the Commission and the Public Company Accounting Oversight Board (United States) and as required by the Securities Act.

(t) Title to Real and Personal Property. The Parent and its subsidiaries have good and marketable title (or, as to properties located in Texas, good and indefeasible title) in fee simple to, or have valid rights to lease or otherwise use, all items of real and personal property that are material to the respective businesses of the Parent and its subsidiaries taken as a whole, in each case free and clear of all liens, encumbrances, claims and defects and imperfections of title except (i) those that do not materially interfere with the use made and proposed to be made of such property by the Parent and its subsidiaries, (ii) the mortgages and related liens on any of the real property to the extent permitted by the Indenture, or (iii) those that could not reasonably be expected, individually or in the aggregate, to have a Material Adverse Effect. Each of

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the properties owned by the Parent and its subsidiaries complies with all applicable codes, laws and regulations (including, without limitation, building and zoning codes, laws and regulations and laws relating to access to such properties), except if and to the extent described in each of the Registration Statement, the Time of Sale Information and the Prospectus and except for such failures to comply as would not reasonably be expected to result in a Material Adverse Effect; there is no pending or, to the Company’s and the Parent’s knowledge, threatened condemnation, zoning change, proceeding or action that could reasonably be expected in any material respect to affect the size of, use of, improvements of, construction on, or access to any of the properties of the Parent and its subsidiaries, except if and to the extent described in each of the Registration Statement, the Time of Sale Information and the Prospectus.

(u) Title to Intellectual Property. Except to the extent described in the Time of Sale Information or the Prospectus and except as would not reasonably be expected to result in a Material Adverse Effect, the Parent and its subsidiaries own or possess adequate rights to use all material patents, patent applications, trademarks, service marks, trade names, trademark registrations, service mark registrations, copyrights, licenses and know-how (including trade secrets and other unpatented and/or unpatentable proprietary or confidential information, systems or procedures) necessary for the conduct of their respective businesses; and, to the knowledge of the Company and the Parent, the conduct of their respective businesses will not conflict in any material respect with any such rights of others, and the Parent and its subsidiaries have not received any written notice of any claim of infringement of or conflict with any such rights of others.

(v) No Undisclosed Relationships. No relationship, direct or indirect, exists between or among the Parent or any of its subsidiaries, on the one hand, and the directors, officers, stockholders or other affiliates of the Parent or any of its subsidiaries, on the other, that is required by the Securities Act to be described in each of the Registration Statement, the Time of Sale Information and the Prospectus and that is not so described in each of the Registration Statement, the Time of Sale Information and the Prospectus.

(w) Investment Company Act. None of the Company, the Parent or any of its subsidiaries is, and after giving effect to the offering and sale of the Securities and the application of the proceeds thereof as described in each of the Registration Statement, the Time of Sale Information and the Prospectus none of them will be, an “investment company” or an entity “controlled” by an “investment company” within the meaning of the Investment Company Act of 1940, as amended, and the rules and regulations of the Commission thereunder (collectively, the “Investment Company Act”).

(x) Taxes. The Parent and its subsidiaries have paid all material federal, state, local and foreign taxes that are due and payable through the date hereof and filed all material tax returns required to be paid or filed through the date hereof or have

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requested extensions thereof; and except as otherwise disclosed in each of the Registration Statement, the Time of Sale Information and the Prospectus, there is no material tax deficiency that has been, or could reasonably be expected to be, asserted against the Parent or any of its subsidiaries or any of their respective properties or assets (except for any such deficiency that is being contested in good faith).

(y) Licenses and Permits. The Parent and its subsidiaries possess all licenses, certificates, permits and other authorizations issued by, and have made all declarations and filings with, the appropriate federal, state, local or foreign governmental or regulatory authorities that are necessary for the ownership or lease of their respective properties or the conduct of their respective businesses as described in each of the Registration Statement, the Time of Sale Information and the Prospectus, except where the failure to possess or make the same would not, individually or in the aggregate, have a Material Adverse Effect; and except as described in each of the Registration Statement, the Time of Sale Information and the Prospectus, neither the Parent nor any of its subsidiaries has received written notice of any revocation or modification of any such license, certificate, permit or authorization or has any reason to believe that any such license, certificate, permit or authorization will not be renewed in the ordinary course.

(z) No Labor Disputes. No labor disturbance by or dispute with employees of the Parent or any of its subsidiaries exists or, to the knowledge of the Company and the Parent, is contemplated or threatened and neither the Company nor any Parent is aware of any existing or imminent labor disturbance by, or dispute with, the employees of any of the Parent’s or any of the Parent’s subsidiaries’ principal suppliers, contractors or customers, except as would not have a Material Adverse Effect.

(aa) Compliance With Environmental Laws. (i) Each property owned, leased or operated by the Parent or any of its subsidiaries, including, without limitation, the Environment (as defined below) within the perimeter boundaries of and associated with such property, is free of any Hazardous Substance (as defined below), except for Hazardous Substances that would not reasonably be expected to result in a Material Adverse Effect; (ii) no condition, including any Release, exists on, in, under or from any property owned, leased or operated by the Parent or any of its subsidiaries or, to the knowledge of the Company and the Parent, other property that has resulted or could result in the incurrence of liabilities by the Parent or any of its subsidiaries under or any violations by the Parent or any of its subsidiaries of any Environmental Law, give rise to the imposition of any Lien under any Environmental Law, or cause or constitute a health, safety or environmental hazard to any property, person or entity, except in each case that would not reasonably be expected to have a Material Adverse Effect; (iii) neither the Parent or any subsidiary nor, to the knowledge of the Company and the Parent, any tenant of any of the properties owned, leased or operated by the Parent or any of its subsidiaries has received any notice of a claim, potential liability or violation under or pursuant to any Environmental Law including with respect to Hazardous

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Substances on or originating from such property, except for any such claims which would not reasonably be expected to have a Material Adverse Effect; (iv) no property owned, leased or operated by the Parent or any of its subsidiaries is included or, to the knowledge of the Company and the Parent, proposed for inclusion on the National Priorities List issued pursuant to the Comprehensive Environmental Response Compensation Liability Act (“CERCLA”) by the United States Environmental Protection Agency (the “EPA”), nor has the Parent or any subsidiary received any notice from the EPA or any other governmental authority proposing the inclusion of any such property on such list; (v) the Parent and each of its subsidiaries and, to the knowledge of the Company and the Parent, each tenant at any of the properties owned, leased or operated by the Parent and its subsidiaries (A) have received all permits, licenses or other approvals required of them under applicable Environmental Laws to conduct their respective businesses and (B) are in compliance with all terms and conditions of any such permit, license or approval and all applicable Environmental Laws, except in each case where such noncompliance, failure to receive required permits, licenses or other approvals or failure to comply with the terms and conditions of such permits, licenses, approvals or applicable Environmental Laws would not reasonably be expected to have a Material Adverse Effect; and (vi) neither the Parent nor its subsidiaries (nor their respective predecessor entities) are subject to any costs or liabilities arising under Environmental Laws or resulting from any Hazardous Substances (including, without limitation, any capital or operating expenditures required for clean-up, closure of properties or compliance with Environmental Laws or any permit, license or approval, any related constraints on operating activities and any potential liabilities to third parties) which would reasonably be expected to have a Material Adverse Effect.

As used herein: “Hazardous Substance” shall include, without limitation, any hazardous substance, hazardous waste, hazardous building materials, toxic substance, pollutant, solid waste or similarly designated materials, including, without limitation, oil, petroleum or any petroleum-derived substance or waste, asbestos or asbestos-containing materials, lead-based paint, PCBs, pesticides, explosives, radioactive materials, dioxins, urea formaldehyde insulation or any hazardous constituent of any such substance, pollutant or waste identified or regulated under any Environmental Law; “Environment” shall mean any surface water, drinking water, ground water, soil, land surface, subsurface strata, river sediment, buildings, structures, and ambient, workplace and indoor air; “Environmental Law” shall mean all other applicable federal, state, local and foreign laws (including the common law), ordinances, regulations, rules, orders, decisions and permits relating to the protection of the environment, human health and safety as affected by Hazardous Substances, or natural resources or the regulation of hazardous substances or wastes, pollutants, or contaminants; “Lien” shall mean, with respect to any securities, assets or other property owned, leased or operated by the Parent or any of its subsidiaries, any mortgage, deed of trust, pledge, security interest, lien, encumbrance, penalty, fine, charge, assessment, judgment or other liability in, on or affecting such securities, assets or other property; and “Release”

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shall mean any spilling, leaking, pumping, pouring, emitting, emptying, discharging, injecting, escaping, leaching, dumping, emanating or disposing of any Hazardous Substance into the Environment, including, without limitation, the abandonment or discard of barrels, containers, tanks (including, without limitation, underground storage tanks) or other receptacles containing or previously containing any Hazardous Substance or any release, emission, discharge or similar term, as those terms are defined or used in any applicable Environmental Law.

(bb) Compliance With ERISA. (i) Each employee benefit plan, within the meaning of Section 3(3) of the Employee Retirement Income Security Act of 1974, as amended (“ERISA”), for which the Parent, the Company or any member of their respective “Controlled Groups” (defined as any organization which is a member of a controlled group of corporations within the meaning of Section 414 of the Internal Revenue Code of 1986, as amended (the “Code”)) would have any liability (each, a “Plan”) has been maintained in compliance with its terms and the requirements of any applicable statutes, orders, rules and regulations, including but not limited to ERISA and the Code; (ii) no prohibited transaction, within the meaning of Section 406 of ERISA or Section 4975 of the Code, has occurred with respect to any Plan excluding transactions effected pursuant to a statutory or administrative exemption; (iii) for each Plan that is subject to the funding rules of Section 412 of the Code or Section 302 of ERISA, no “accumulated funding deficiency” as defined in Section 412 of the Code, whether or not waived, has occurred or is reasonably expected to occur; (iv) the fair market value of the assets of each Plan exceeds the present value of all benefits accrued under such Plan (determined based on those assumptions used to fund such Plan); (v) no “reportable event” (within the meaning of Section 4043(c) of ERISA) has occurred or is reasonably expected to occur; and (vi) neither the Parent nor any member of the Controlled Group has incurred, nor reasonably expects to incur, any liability under Title IV of ERISA (other than contributions to the Plan or premiums to the PBGC, in the ordinary course and without default) in respect of a Plan (including a “multiemployer plan”, within the meaning of Section 4001(a)(3) of ERISA).

(cc) Disclosure Controls . The Parent and its subsidiaries maintain an effective system of “disclosure controls and procedures” (as defined in Rule 13a-15(e) of the Exchange Act) that is designed to ensure that information required to be disclosed by the Parent in reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the Commission’s rules and forms, including controls and procedures designed to ensure that such information is accumulated and communicated to the Parent’s management as appropriate to allow timely decisions regarding required disclosure. The Parent and its subsidiaries have carried out evaluations of the effectiveness of their disclosure controls and procedures as required by Rule 13a-15(e) of the Exchange Act.

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(dd) Accounting Controls. The Parent and its subsidiaries maintain systems of “internal control over financial reporting” (as defined in Rule 13a-15(f) of the Exchange Act) that comply with the requirements of the Exchange Act and have been designed by, or under the supervision of, their respective principal executive and principal financial officers, or persons performing similar functions, 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. The Parent and its subsidiaries maintain internal accounting controls sufficient to provide reasonable assurance that (i) transactions are executed in accordance with management’s general or specific authorizations; (ii) transactions are recorded as necessary to permit preparation of financial statements in conformity with generally accepted accounting principles and to maintain asset accountability; (iii) access to assets is permitted only in accordance with management’s general or specific authorization; (iv) the recorded accountability for assets is compared with the existing assets at reasonable intervals and appropriate action is taken with respect to any differences; and (v) interactive data in eXtensbile Business Reporting Language included or incorporated by reference in the Registration Statement, the Prospectus and the Time of Sale Information is prepared in accordance with the Commission’s rules and guidelines applicable thereto. Except as disclosed in each of the Registration Statement, the Time of Sale Information and the Prospectus, there are no material weaknesses or significant deficiencies in the Parent’s or any subsidiary’s internal controls.

(ee) Insurance. The Parent and its subsidiaries have insurance covering their respective properties, operations, personnel and businesses, including business interruption insurance, which insurance is in amounts and insures against such losses and risks as are prudent and customary in the business in which the Parent and its subsidiaries are engaged; and neither the Parent nor any of its subsidiaries has (i) received notice from any insurer or agent of such insurer that capital improvements or other expenditures are required or necessary to be made in order to continue such insurance or (ii) any reason to believe that it will not be able to renew its existing insurance coverage as and when such coverage expires or to obtain similar coverage at reasonable cost from similar insurers as may be necessary to continue its business.

(ff) No Unlawful Payments. Neither the Parent nor any of its subsidiaries nor, to the knowledge of the Company and the Parent, any director, officer, agent, employee or other person associated with or acting on behalf of the Parent or any of its subsidiaries has (i) used any corporate funds for any unlawful contribution, gift, entertainment or other unlawful expense relating to political activity; (ii) made any direct or indirect unlawful payment to any foreign or domestic government official or employee from corporate funds; (iii) violated or is in violation of any provision of the Foreign Corrupt Practices Act of 1977; or (iv) made, offered, agreed, requested or taken an act in furtherance of any unlawful bribe or other unlawful benefit, including, without limitation, any rebate, payoff, influence payment, kickback or other unlawful or improper payment or benefit. The Parent and its subsidiaries have instituted, maintain and enforce policies and procedures designed to promote and ensure compliance with all applicable anti-bribery and anti-corruption laws.

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(gg) Compliance with Money Laundering Laws . The operations of the Parent and its subsidiaries are and have been conducted at all times in compliance with applicable financial recordkeeping and reporting requirements of the Currency and Foreign Transactions Reporting Act of 1970, as amended, the applicable money laundering statutes of all jurisdictions, the rules and regulations thereunder and any related or similar rules, regulations or guidelines, issued, administered or enforced by any governmental agency (collectively, the “Money Laundering Laws”) and no action, suit or proceeding by or before any court or governmental agency, authority or body or any arbitrator involving the Parent or any of its subsidiaries with respect to the Money Laundering Laws is pending or, to the knowledge of the Company and the Parent, threatened.

(hh) Compliance with OFAC . None of the Parent, any of its subsidiaries or, to the knowledge of the Company and the Parent, any director, officer, agent, employee or affiliate of the Company or any of its subsidiaries is currently subject to or the target of any U.S. sanctions administered by the Office of Foreign Assets Control of the U.S. Department of the Treasury (“OFAC”); and the Company will not directly or indirectly use the proceeds of the offering of the Securities hereunder, or lend, contribute or otherwise make available such proceeds to any subsidiary, joint venture partner or other person or entity in any manner that will result in a violation of any economic sanctions imposed by the United States (including any administered or enforced by OFAC, the U.S. Department of State, or the Bureau of Industry and Security of the U.S. Department of Commerce) (collectively, “Sanctions” and such persons, “Sanction Persons”) by, or would reasonably be expected to result in the imposition of Sanctions against, any person (including any person participating in the offering, whether as underwriter, advisor, investor or otherwise).

(ii) Solvency. On and immediately after the Closing Date, the Company and each Parent (after giving effect to the issuance of the Securities and the other transactions related thereto as described in each of the Registration Statement, the Time of Sale Information and the Prospectus) will be Solvent. As used in this paragraph, the term “Solvent” means, with respect to a particular date, that on such date (i) the present fair market value (or present fair saleable value) of the assets of the Company or the Parent, as applicable, is not less than the total amount required to pay the liabilities of the Company or the Parent, as applicable, on its total existing debts and liabilities (including contingent liabilities) as they become absolute and matured; (ii) the Company or the Parent, as applicable, is able to realize upon its assets and pay its debts and other liabilities, contingent obligations and commitments as they mature and become due in the normal course of business; (iii) assuming consummation of the issuance of the Securities as contemplated by this Agreement, the Registration Statement, the Time of Sale Information and the Prospectus, the Company or the Parent, as applicable, is not incurring

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debts or liabilities beyond its ability to pay as such debts and liabilities mature; (iv) the Company or the Parent, as applicable, is not engaged in any business or transaction, and does not propose to engage in any business or transaction, for which its property would constitute unreasonably small capital after giving due consideration to the prevailing practice in the industry in which the Company or the Parent, as applicable, is engaged; and (v) the Company or the Parent, as applicable, is not a defendant in any civil action that would result in a judgment that the Company or the Parent, as applicable, is or would become unable to satisfy.

(jj) No Restrictions on Dividends . No subsidiary of the Company or the Parent is currently prohibited, directly or indirectly, from paying any dividends to the Company or the Parent, from making any other distribution on such subsidiary’s capital stock, from repaying to the Company any loans or advances to such subsidiary from the Company or from transferring any of such subsidiary’s property or assets to the Company or any other subsidiary of the Company, except as described in or contemplated by the Registration Statement, the Time of Sale Information and the Prospectus or to the extent such limitation would not impair the Parent’s ability to maintain its status as a real estate investment trust under the Code (as defined below).

(kk) No Broker’s Fees. Neither the Parent nor any of its subsidiaries is a party to any contract, agreement or understanding with any person (other than this Agreement) that would give rise to a valid claim against any of them or any Underwriter for a brokerage commission, finder’s fee or like payment in connection with the offering and sale of the Securities.

(ll) No Stabilization. Neither the Company nor the Parent has taken, directly or indirectly, any action designed to or that could reasonably be expected to cause or result in any stabilization or manipulation of the price of the Securities.

(mm) Statistical and Market Data . Nothing has come to the attention of the Company or the Parent that has caused the Company or any Parent to believe that the statistical and market-related data included or incorporated by reference in each of the Registration Statement, the Time of Sale Information and the Prospectus is not based on or derived from sources that are reliable and accurate in all material respects.

(nn) Sarbanes-Oxley Act . There is and has been no failure on the part of the Parent or to the knowledge of the Company or the Parent, any of the Parent’s directors or officers, in their capacities as such, to comply with any provision of the Sarbanes-Oxley Act of 2002 and the rules and regulations promulgated in connection therewith (the “Sarbanes-Oxley Act”), including Section 402 related to loans and Sections 302 and 906 related to certifications.

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(oo) REIT Status . The Parent has been organized and operated in conformity with the requirements for qualification and taxation as a real estate investment trust under the Internal Revenue Code of 1986, as amended (the “Code”) for all taxable years commencing with its taxable year ended December 31, 2003 and through its taxable year ended December 31, 2015. The Parent has filed an election to be taxable as a real estate investment trust for its taxable year ended December 31, 2003, and such election has not been terminated. The Parent’s current and proposed method of operation will permit it to continue to meet the requirements for taxation as a real estate investment trust under the Code. The Parent intends to continue to operate in a manner which would permit it to qualify as a real estate investment trust under the Code.

(pp) No Transfer Taxes . There are no transfer taxes or other similar fees or charges under federal law or the laws of any state, or any political subdivision thereof, required to be paid in connection with the execution and delivery of this Agreement or the sale of the Securities by the Company.

(qq) No Registration Rights . No person has the right to require the Company or any of its subsidiaries to register any securities for sale under the Securities Act by reason of the filing of the Registration Statement with the Commission or the issuance and sale of the Securities.

(rr) Forward-Looking Statements. No forward-looking statement (within the meaning of Section 27A of the Securities Act and Section 21E of the Exchange Act) included or incorporated by reference in any of the Registration Statement, the Time of Sale Information or the Prospectus has been made or reaffirmed without a reasonable basis or has been disclosed other than in good faith.

(ss) Status under the Securities Act . The Company is not an ineligible issuer and is a well-known seasoned issuer, in each case as defined under the Securities Act, in each case at the times specified in the Securities Act in connection with the offering of the Securities.

4. Further Agreements of the Company and the Parent . The Company and the Parent jointly and severally covenant and agree with each Underwriter that:

(a) Required Filings. The Company and the Parent will file the final Prospectus with the Commission within the time periods specified by Rule 424(b) and Rule 430A, 430B or 430C under the Securities Act, will file any Issuer Free Writing Prospectus (including the Pricing Term Sheet referred to in Annex B hereto) to the extent required by Rule 433 under the Securities Act; and the Company will file promptly all reports and any definitive proxy or information statements required to be filed by the Company with the Commission pursuant to Section 13(a), 13(c), 14 or 15(d) of the Exchange Act subsequent to the date of the Prospectus and for so long as the delivery

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of a prospectus is required in connection with the offering or sale of the Securities; and the Company will furnish copies of the Prospectus and each Issuer Free Writing Prospectus (to the extent not previously delivered) to the Underwriters in New York City prior to 10:00 A.M., New York City time, on the second business day succeeding the date of this Agreement in such quantities as the Representatives may reasonably request. The Company will pay the registration fees for this offering within the time period required by Rule 456(b)(1)(i) under the Securities Act (without giving effect to the proviso therein) and in any event prior to the Closing Date.

(b) Delivery of Copies. The Company will deliver, without charge, to the Underwriters as many copies of the Registration Statement, the Preliminary Prospectus, any other Time of Sale Information, any Issuer Free Writing Prospectus and the Prospectus (including all amendments and supplements thereto) as the Representatives may reasonably request.

(c) Prospectus, Amendments or Supplements. Before finalizing the Prospectus or making or distributing any amendment or supplement to any of the Time of Sale Information or the Prospectus or filing with the Commission any document that will be incorporated by reference therein, the Company will furnish to the Representatives and counsel for the Underwriters a copy of the proposed Prospectus or such amendment or supplement or document to be incorporated by reference therein for review, and will not distribute any such proposed Prospectus, amendment or supplement or file any such document with the Commission to which the Representatives reasonably object.

(d) Additional Issuer Free Writing Prospectuses. Before making, preparing, using, authorizing, approving, referring to or filing any Issuer Free Writing Prospectus, the Company will furnish to the Representatives and counsel for the Underwriters a copy of the proposed Issuer Free Writing Prospectus for review and will not make, prepare, use, authorize, approve, refer to or file any such Issuer Free Writing Prospectus to which the Representatives reasonably object.

(e) Notice to the Representatives. The Company will advise the Representatives promptly, and confirm such advice in writing, (i) when any amendment to the Registration Statement has been filed or becomes effective; (ii) when any supplement to the Prospectus or any amendment to the Prospectus or any Issuer Free Writing Prospectus has been filed; (iii) of any request by the Commission for any amendment to the Registration Statement or any amendment or supplement to the Prospectus or the receipt of any comments from the Commission relating to the Registration Statement or any other request by the Commission for any additional information; (iv) of the issuance by the Commission or any governmental or regulatory authority of any order suspending the effectiveness of the Registration Statement or preventing or suspending the use of any of the Time of Sale Information, any Issuer

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Free Writing Prospectus or the Prospectus or the initiation or threatening of any proceeding for that purpose or pursuant to Section 8A of the Securities Act; (v) of the occurrence of any event at any time prior to the completion of the initial offering of the Securities as a result of which any of the Time of Sale Information, any Issuer Free Writing Prospectus or the Prospectus as then amended or supplemented would include any untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary in order to make the statements therein, in the light of the circumstances existing when such Time of Sale Information, Issuer Free Writing Prospectus or the Prospectus is delivered to a purchaser, not misleading; (vi) of the receipt by the Company of any notice of objection of the Commission to the use of the Registration Statement or any post-effective amendment thereto pursuant to Rule 401(g)(2) under the Securities Act; and (vii) of the receipt by the Company of any notice with respect to any suspension of the qualification of the Securities for offer and sale in any jurisdiction or the initiation or threatening of any proceeding for such purpose; and the Company will use its reasonable best efforts to prevent the issuance of any such order suspending the effectiveness of the Registration Statement, preventing or suspending the use of any of the Time of Sale Information, any Issuer Free Writing Prospectus or the Prospectus or suspending any such qualification of the Securities and, if any such order is issued, will obtain as soon as possible the withdrawal thereof.

(f) Time of Sale Information. If at any time prior to the Closing Date (i) any event shall occur or condition shall exist as a result of which any of the Time of Sale Information as then amended or supplemented would include any untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading or (ii) it is necessary to amend or supplement any of the Time of Sale Information to comply with law, the Company will immediately notify the Underwriters thereof and forthwith prepare and, subject to paragraph (c) above, file with the Commission (to the extent required) and furnish to the Underwriters such amendments or supplements to any of the Time of Sale Information (or any document to be filed with the Commission and incorporated by reference therein) as may be necessary so that the statements in any of the Time of Sale Information as so amended or supplemented will not, in light of the circumstances under which they were made, be misleading or so that any of the Time of Sale Information will comply with law.

(g) Ongoing Compliance of the Prospectus. If at any time prior to the completion of the initial offering of the Securities (i) any event shall occur or condition shall exist as a result of which the Prospectus as then amended or supplemented would include any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary in order to make the statements therein, in the light of the circumstances existing when the Prospectus is delivered to a purchaser, not misleading or (ii) it is necessary to amend or supplement the Prospectus to comply with law, the Company will immediately notify the Underwriters thereof and forthwith prepare

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and, subject to paragraph (c) above, file with the Commission and furnish to the Underwriters such amendments or supplements to the Prospectus (or any document to be filed with the Commission and incorporated by reference therein) as may be necessary so that the statements in the Prospectus as so amended or supplemented (including such document to be incorporated by reference therein) will not, in the light of the circumstances existing when the Prospectus is delivered to a purchaser, be misleading or so that the Prospectus will comply with law.

(h) Blue Sky Compliance. The Company will qualify the Securities for offer and sale under the securities or Blue Sky laws of such jurisdictions as the Representatives shall reasonably request and will continue such qualifications in effect so long as required for the offering and resale of the Securities; provided that neither the Company nor the Parent shall be required to (i) qualify as a foreign corporation or other entity or as a dealer in securities in any such jurisdiction where it would not otherwise be required to so qualify, (ii) file any general consent to service of process in any such jurisdiction or (iii) subject itself to taxation in any such jurisdiction if it is not otherwise so subject.

(i) Clear Market . During the period from the date hereof through and including the Closing Date, the Company and the Parent will not, without the prior written consent of the Representatives, offer, sell, contract to sell or otherwise dispose of any debt securities issued or guaranteed by the Company or the Parent and having a tenor of more than one year.

(j) Use of Proceeds. The Company will apply the net proceeds from the sale of the Securities as described in each of the Registration Statement, the Time of Sale Information and the Prospectus under the heading “Use of proceeds”.

(k) DTC. The Company will assist the Underwriters in arranging for the Securities to be eligible for clearance and settlement through The Depository Trust Company (“DTC”).

(l) No Stabilization. Neither the Company nor the Parent will take, directly or indirectly, any action designed to or that could reasonably be expected to cause or result in any stabilization or manipulation of the price of the Securities.

(m) Record Retention . The Company will, pursuant to reasonable procedures developed in good faith, retain copies of each Issuer Free Writing Prospectus that is not filed with the Commission in accordance with Rule 433 under the Securities Act.

5. Certain Agreements of the Underwriters . Each Underwriter hereby represents and agrees that it has not and will not use, authorize use of, refer to, or participate in the planning for use of, any “free writing prospectus”, as defined in Rule

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405 under the Securities Act (which term includes use of any written information furnished to the Commission by the Company and not incorporated by reference into the Registration Statement and any press release issued by the Company) other than (i) a free writing prospectus that, solely as a result of use by such Underwriter, would not trigger an obligation to file such free writing prospectus with the Commission pursuant to Rule 433, (ii) any Issuer Free Writing Prospectus listed on Annex A or prepared pursuant to Section 3(c) or Section 4(c) above (including any electronic road show), or (iii) any free writing prospectus prepared by such Underwriter and approved by the Company in advance in writing. Notwithstanding the foregoing, the Underwriters may use the Pricing Term Sheet referred to in Annex B hereto without the consent of the Company.

6. Conditions of Underwriters’ Obligations. The obligation of each Underwriter to purchase Securities on the Closing Date as provided herein is subject to the performance by the Company and the Parent of their respective covenants and other obligations hereunder and to the following additional conditions:

(a) Registration Compliance; No Stop Order . No order suspending the effectiveness of the Registration Statement shall be in effect, and no proceeding for such purpose, pursuant to Rule 401(g)(2) or pursuant to Section 8A under the Securities Act shall be pending before or threatened by the Commission; the Prospectus and each Issuer Free Writing Prospectus shall have been timely filed with the Commission under the Securities Act (in the case of an Issuer Free Writing Prospectus, to the extent required by Rule 433 under the Securities Act) and in accordance with Section 4(a) hereof; and all requests by the Commission for additional information shall have been complied with to the reasonable satisfaction of the Representatives.

(b) Representations and Warranties. The representations and warranties of the Company and the Parent contained herein shall be true and correct on the date hereof and on and as of the Closing Date; and the statements of the Company, the Parent and their respective officers made in any certificates delivered pursuant to this Agreement shall be true and correct on and as of the Closing Date.

(c) No Downgrade. Subsequent to the earlier of (A) the Time of Sale and (B) the execution and delivery of this Agreement, (i) no downgrading shall have occurred in the rating accorded the Securities or any other debt securities or preferred stock issued or guaranteed by the Company, the Parent or any of its subsidiaries by any “nationally recognized statistical rating organization”, as such term as defined in Section 3(a)(62) of the Exchange Act; and (ii) no such organization shall have publicly announced that it has under surveillance or review, or has changed its outlook with respect to, its rating of the Securities or of any other debt securities or preferred stock issued or guaranteed by the Company, the Parent or any of its subsidiaries (other than an announcement with positive implications of a possible upgrading or no implication of a possible downgrading).

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(d) No Material Adverse Change. No event or condition of a type described in Section 3(g) hereof shall have occurred or shall exist, which event or condition is not described in each of the Time of Sale Information (excluding any amendment or supplement thereto) and the Prospectus (excluding any amendment or supplement thereto) the effect of which in the judgment of the Representatives makes it impracticable or inadvisable to proceed with the offering, sale or delivery of the Securities on the terms and in the manner contemplated by this Agreement, the Registration Statement, the Time of Sale Information and the Prospectus.

(e) Officer’s Certificate. The Representatives shall have received on and as of the Closing Date a certificate of an executive officer of the Company and of the Parent (i) confirming that such officer has carefully reviewed the Registration Statement, the Time of Sale Information and the Prospectus and, to the knowledge of such officer, the representations set forth in Sections 3(b), (c) and (d) hereof are true and correct, (ii) confirming that the other representations and warranties of the Company and the Parent in this Agreement are true and correct and that the Company and the Parent have complied with all agreements and satisfied all conditions on its part to be performed or satisfied hereunder at or prior to the Closing Date and (iii) to the effect set forth in paragraphs (a), (c) and (d) above.

(f) Comfort Letters. On the date of this Agreement and on the Closing Date, Deloitte & Touche LLP shall have furnished to the Representatives, at the request of the Company, letters, dated the respective dates of delivery thereof and addressed to the Underwriters, in form and substance reasonably satisfactory to the Representatives, containing statements and information of the type customarily included in accountants’ “comfort letters” to underwriters with respect to the financial statements and certain financial information contained or incorporated by reference in each of the Registration Statement, the Time of Sale Information and the Prospectus; provided that the letter delivered on the Closing Date shall use a “cut-off” date no more than three business days prior to the Closing Date.

(g) Opinions and 10b-5 Statement of Counsel for the Company. King & Spalding, LLP (US), counsel for the Company, shall have furnished to the Representatives, at the request of the Company, their written opinions (which shall include a tax opinion as to REIT status of the Parent) and 10b-5 statement, dated the Closing Date and addressed to the Underwriters, in form and substance reasonably satisfactory to the Representatives, to the effect set forth in Annex C-1 hereto. Venable LLP, counsel for the Parent, shall have furnished to the Representatives, at the request of the Parent, their written opinion, dated the Closing Date and addressed to the Underwriters, in form and substance reasonably satisfactory to the Representatives, to the effect set forth in Annex C-2 hereto.

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(h) Opinion and 10b-5 Statement of Counsel for the Underwriters. The Representatives shall have received on and as of the Closing Date an opinion and 10b-5 statement of Davis Polk & Wardwell LLP, counsel for the Underwriters, with respect to such matters as the Representatives may reasonably request, and such counsel shall have received such documents and information as they may reasonably request to enable them to pass upon such matters.

(i) No Legal Impediment to Issuance. No action shall have been taken and no statute, rule, regulation or order shall have been enacted, adopted or issued by any federal, state or foreign governmental or regulatory authority that would, as of the Closing Date, prevent the issuance or sale of the Securities or the issuance of the Guarantee; and no injunction or order of any federal, state or foreign court shall have been issued that would, as of the Closing Date, prevent the issuance or sale of the Securities or the issuance of the Guarantee.

(j) Good Standing . The Representatives shall have received (A) on or before the Closing Date satisfactory evidence of the good standing as of a recent date of the Company and the Parent in their respective jurisdictions of organization and in such other jurisdictions as the Representatives may reasonably request and (B) on and as of the Closing Date satisfactory evidence of the good standing of the Company and the Parent in their respective jurisdictions of organization and in such other jurisdictions as the Representatives may reasonably request, in each case in writing or any standard form of telecommunication, from the appropriate governmental authorities of such jurisdictions.

(k) DTC. The Securities shall be eligible for clearance and settlement through DTC.

(l) Additional Documents. On or prior to the Closing Date, the Company and the Parent shall have furnished to the Representatives such further certificates and documents as the Representatives may reasonably request.

All opinions, letters, certificates and evidence mentioned above or elsewhere in this Agreement shall be deemed to be in compliance with the provisions hereof only if they are in form and substance reasonably satisfactory to counsel for the Underwriters.

7. Indemnification and Contribution .

(a) Indemnification of the Underwriters. The Company and the Parent jointly and severally agree to indemnify and hold harmless each Underwriter, its affiliates,

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directors and officers and each person, if any, who controls such Underwriter within the meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act, from and against any and all losses, claims, damages and liabilities (including, without limitation, legal fees and other expenses incurred in connection with any suit, action or proceeding or any claim asserted, as such fees and expenses are incurred), joint or several, that arise out of, or are based upon, (i) any untrue statement or alleged untrue statement of a material fact contained in the Registration Statement or caused by any omission or alleged omission to state therein a material fact required to be stated therein or necessary in order to make the statements therein, not misleading, (ii) or any untrue statement or alleged untrue statement of a material fact contained in the Prospectus (or any amendment or supplement thereto), any Issuer Free Writing Prospectus or any Time of Sale Information, or caused by any omission or alleged omission to state therein a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading, in each case except insofar as such losses, claims, damages or liabilities arise out of, or are based upon, any untrue statement or omission or alleged untrue statement or omission made in reliance upon and in conformity with any information relating to any Underwriter furnished to the Company in writing by such Underwriter through the Representatives expressly for use therein.

(b) Indemnification of the Company. Each Underwriter agrees, severally and not jointly, to indemnify and hold harmless each of the Company and the Parent, and each of their respective directors and officers and each person, if any, who controls the Company or the Parent within the meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act to the same extent as the indemnity set forth in paragraph (a) above, but only with respect to any losses, claims, damages or liabilities that arise out of, or are based upon, any untrue statement or omission or alleged untrue statement or omission made in reliance upon and in conformity with any information relating to such Underwriter furnished to the Company in writing by such Underwriter through the Representatives expressly for use in the Registration Statement, the Preliminary Prospectus, any of the other Time of Sale Information, any Issuer Free Writing Prospectus or the Prospectus (or any amendment or supplement thereto), it being understood and agreed that the only such information consists of the following: paragraph 3 (for the avoidance of doubt, such paragraph begins “The underwriters initially propose…”), the third and fourth sentences of paragraph 7 (for the avoidance of doubt, such sentences begin “The underwriters have advised us…” and “The underwriters may discontinue…”, respectively), and paragraph 8 (concerning overallotment, stabilizing transactions and syndicate covering transactions) under the caption “Underwriting (Conflicts of Interest).”

(c) Notice and Procedures. If any suit, action, proceeding (including any governmental or regulatory investigation), claim or demand shall be brought or asserted against any person in respect of which indemnification may be sought pursuant to either

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paragraph (a) or (b) above, such person (the “Indemnified Person”) shall promptly notify the person against whom such indemnification may be sought (the “Indemnifying Person”) in writing; provided that the failure to notify the Indemnifying Person shall not relieve it from any liability that it may have under this Section 7 except to the extent that it has been materially prejudiced (through the forfeiture of substantive rights or defenses) by such failure; and provided , further , that the failure to notify the Indemnifying Person shall not relieve it from any liability that it may have to an Indemnified Person otherwise than under this Section 7. If any such proceeding shall be brought or asserted against an Indemnified Person and it shall have notified the Indemnifying Person thereof, the Indemnifying Person shall retain counsel reasonably satisfactory to the Indemnified Person (who shall not, without the consent of the Indemnified Person, be counsel to the Indemnifying Person) to represent the Indemnified Person and any others entitled to indemnification pursuant to this Section 7 that the Indemnifying Person may designate in such proceeding and shall pay the reasonable fees and expenses of such proceeding and shall pay the fees and expenses of such counsel related to such proceeding, as incurred. The Indemnifying Person shall be entitled to participate in the defense of any claim, and to the extent that it may wish, assume the defense thereof;  provided , that after notice from the Indemnifying Person to such Indemnified Party of its election so to assume the defense thereof, the Indemnifying Person shall not be liable to such Indemnified Person under such subsection for any legal expenses of other counsel subsequently incurred by such Indemnified Person, in connection with the defense thereof other; provided , further, in any such proceeding, any Indemnified Person shall have the right to retain its own counsel, but the fees and expenses of such counsel shall be at the expense of such Indemnified Person unless (i) the Indemnifying Person and the Indemnified Person shall have mutually agreed to the contrary; (ii) the Indemnifying Person has failed within a reasonable time to retain counsel reasonably satisfactory to the Indemnified Person; (iii) counsel to the Indemnified Person shall have reasonably concluded that there may be legal defenses available to the Indemnified Person that are different from or in addition to those available to the Indemnifying Person; or (iv) the named parties in any such proceeding (including any impleaded parties) include both the Indemnifying Person and the Indemnified Person and representation of both parties by the same counsel would be inappropriate due to actual or potential differing interests between them. It is understood and agreed that the Indemnifying Person shall not, in connection with any proceeding or related proceeding in the same jurisdiction, be liable for the fees and expenses of more than one separate firm (in addition to any local counsel) for all Indemnified Persons, and that all such fees and expenses shall be reimbursed as they are incurred. Any such separate firm for any Underwriter, its affiliates, directors and officers and any control persons of such Underwriter shall be designated in writing by the Representatives and any such separate firm for the Company, the Parent, their respective directors and officers and any control persons of the Company and the Parent shall be designated in writing by the Company. The Indemnifying Person shall not be liable for any settlement of any proceeding effected without its written consent, but if settled with such consent or if there be a final judgment

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for the plaintiff, the Indemnifying Person agrees to indemnify each Indemnified Person from and against any loss or liability by reason of such settlement or judgment. Notwithstanding the foregoing sentence, if at any time an Indemnified Person shall have requested that an Indemnifying Person reimburse the Indemnified Person for fees and expenses of counsel as contemplated by this paragraph, the Indemnifying Person shall be liable for any settlement of any proceeding effected without its written consent if (i) such settlement is entered into more than 30 days after receipt by the Indemnifying Person of such request and (ii) the Indemnifying Person shall not have reimbursed the Indemnified Person in accordance with such request prior to the date of such settlement, except for any amounts that are being contested in good faith. No Indemnifying Person shall, without the written consent of the Indemnified Person, effect any settlement of any pending or threatened proceeding in respect of which any Indemnified Person is or could have been a party and indemnification could have been sought hereunder by such Indemnified Person, unless such settlement (x) includes an unconditional release of such Indemnified Person, in form and substance reasonably satisfactory to such Indemnified Person, from all liability on claims that are the subject matter of such proceeding and (y) does not include any statement as to or any admission of fault, culpability or a failure to act by or on behalf of any Indemnified Person.

(d) Contribution. If the indemnification provided for in paragraphs (a) and (b) above is unavailable to an Indemnified Person or insufficient in respect of any losses, claims, damages or liabilities referred to therein, then each Indemnifying Person under such paragraph, in lieu of indemnifying such Indemnified Person thereunder, shall contribute to the amount paid or payable by such Indemnified Person as a result of such losses, claims, damages or liabilities (i) in such proportion as is appropriate to reflect the relative benefits received by the Company and the Parent on the one hand and the Underwriters on the other from the offering of the Securities or (ii) if the allocation provided by clause (i) is not permitted by applicable law, in such proportion as is appropriate to reflect not only the relative benefits referred to in clause (i) but also the relative fault of the Company and the Parent on the one hand and the Underwriters on the other in connection with the statements or omissions that resulted in such losses, claims, damages or liabilities, as well as any other relevant equitable considerations. The relative benefits received by the Company and the Parent on the one hand and the Underwriters on the other shall be deemed to be in the same respective proportions as the net proceeds (before deducting expenses) received by the Company from the sale of the Securities and the total discounts and commissions received by the Underwriters in connection therewith, as provided in this Agreement, bear to the aggregate offering price of the Securities. The relative fault of the Company and the Parent on the one hand and the Underwriters on the other shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to state a material fact relates to information supplied by the Company or any Parent or by the Underwriters and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission.

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(e) Limitation on Liability. The Company, the Parent and the Underwriters agree that it would not be just and equitable if contribution pursuant to this Section 7 were determined by pro rata allocation (even if the Underwriters were treated as one entity for such purpose) or by any other method of allocation that does not take account of the equitable considerations referred to in paragraph (d) above. The amount paid or payable by an Indemnified Person as a result of the losses, claims, damages and liabilities referred to in paragraph (d) above shall be deemed to include, subject to the limitations set forth above, any legal or other expenses incurred by such Indemnified Person in connection with any such action or claim. Notwithstanding the provisions of this Section 7, in no event shall an Underwriter be required to contribute any amount in excess of the amount by which the total discounts and commissions received by such Underwriter with respect to the offering of the Securities exceeds the amount of any damages that such Underwriter has otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation. The Underwriters’ obligations to contribute pursuant to this Section 7 are several in proportion to their respective purchase obligations hereunder and not joint.

(f) Non-Exclusive Remedies. The remedies provided for in this Section 7 are not exclusive and shall not limit any rights or remedies that may otherwise be available to any Indemnified Person at law or in equity.

8. Termination . This Agreement may be terminated in the absolute discretion of the Representatives, by notice to the Company, if after the execution and delivery of this Agreement and on or prior to the Closing Date (i) trading generally shall have been suspended or materially limited on the New York Stock Exchange; (ii) trading of any securities issued or guaranteed by the Company or the Parent shall have been suspended on any exchange or in any over-the-counter market; (iii) a general moratorium on commercial banking activities shall have been declared by federal or New York State authorities; or (iv) there shall have occurred any outbreak or escalation of hostilities or any change in financial markets or any calamity or crisis, either within or outside the United States, that, in the judgment of the Representatives, is material and adverse and makes it impracticable or inadvisable to proceed with the offering, sale or delivery, of the Securities on the terms and in the manner contemplated by this Agreement, the Registration Statement, the Time of Sale Information and the Prospectus.

9. Defaulting Underwriter .

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(a) If, on the Closing Date, any Underwriter defaults on its obligation to purchase the Securities that it has agreed to purchase hereunder, the non-defaulting Underwriters may in their discretion arrange for the purchase of such Securities by other persons satisfactory to the Company on the terms contained in this Agreement. If, within 36 hours after any such default by any Underwriter, the non-defaulting Underwriters do not arrange for the purchase of such Securities, then the Company shall be entitled to a further period of 36 hours within which to procure other persons satisfactory to the non-defaulting Underwriters to purchase such Securities on such terms. If other persons become obligated or agree to purchase the Securities of a defaulting Underwriter, either the non-defaulting Underwriters or the Company may postpone the Closing Date for up to five full business days in order to effect any changes that in the opinion of counsel for the Company or counsel for the Underwriters may be necessary in the Registration Statement, the Time of Sale Information, the Prospectus or in any other document or arrangement, and the Company agrees to promptly prepare any amendment or supplement to the Registration Statement, the Time of Sale Information or the Prospectus that effects any such changes. As used in this Agreement, the term “Underwriter” includes, for all purposes of this Agreement unless the context otherwise requires, any person not listed in Schedule 1 hereto that, pursuant to this Section 9, purchases Securities that a defaulting Underwriter agreed but failed to purchase.

(b) If, after giving effect to any arrangements for the purchase of the Securities of a defaulting Underwriter or Underwriters by the non-defaulting Underwriters and the Company as provided in paragraph (a) above, the aggregate principal amount of such Securities that remains unpurchased does not exceed one-eleventh of the aggregate principal amount of all the Securities, then the Company shall have the right to require each non-defaulting Underwriter to purchase the principal amount of Securities that such Underwriter agreed to purchase hereunder plus such Underwriter’s pro rata share (based on the principal amount of Securities that such Underwriter agreed to purchase hereunder) of the Securities of such defaulting Underwriter or Underwriters for which such arrangements have not been made.

(c) If, after giving effect to any arrangements for the purchase of the Securities of a defaulting Underwriter or Underwriters by the non-defaulting Underwriters and the Company as provided in paragraph (a) above, the aggregate principal amount of such Securities that remains unpurchased exceeds one-eleventh of the aggregate principal amount of all the Securities, or if the Company shall not exercise the right described in paragraph (b) above, then this Agreement shall terminate without liability on the part of the non-defaulting Underwriters. Any termination of this Agreement pursuant to this Section 9 shall be without liability on the part of the Company or the Parent, except that the Company and the Parent will continue to be liable for the payment of expenses as set forth in Section 10 hereof and except that the provisions of Section 7 hereof shall not terminate and shall remain in effect.

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(d) Nothing contained herein shall relieve a defaulting Underwriter of any liability it may have to the Company, the Parent or any non-defaulting Underwriter for damages caused by its default.

10. Payment of Expenses .

(a) Whether or not the transactions contemplated by this Agreement are consummated or this Agreement is terminated, the Company and the Parent jointly and severally agree to pay or cause to be paid all costs and expenses incident to the performance of their respective obligations hereunder, including without limitation, (i) the costs incident to the authorization, issuance, sale, preparation and delivery of the Securities and any taxes payable in that connection; (ii) the costs incident to the preparation, printing and filing under the Securities Act of the Registration Statement, the Preliminary Prospectus, any other Time of Sale Information, any Issuer Free Writing Prospectus and the Prospectus (including any amendment or supplement thereto) and the distribution thereof; (iii) the costs of reproducing and distributing each of the Transaction Documents; (iv) the fees and expenses of the Company’s and the Parent’s counsel and independent accountants; (v) the fees and expenses incurred in connection with the registration or qualification and determination of eligibility for investment of the Securities under the laws of such jurisdictions as the Representatives may designate and the preparation, printing and distribution of a Blue Sky Memorandum (including up to $5,000 of fees and expenses of counsel for the Underwriters); (vi) any fees charged by rating agencies for rating the Securities; (vii) the fees and expenses of the Trustee and any paying agent (including related fees and expenses of any counsel to such parties to the extent agreed to by the parties); (viii) all expenses and application fees incurred in connection with the approval of the Securities for book-entry transfer by DTC; and (ix) all expenses incurred by the Company in connection with any “road show” presentation to potential investors (it being understood that the Company and the Representatives will each bear their own costs of airfare in connection with any “road show” presentation).

(b) If (i) this Agreement is terminated pursuant to Section 8(ii), (ii) the Company for any reason fails to tender the Securities for delivery to the Underwriters or (iii) the Underwriters decline to purchase the Securities for any other reason permitted under this Agreement, the Company and the Parent jointly and severally agree to reimburse the Underwriters for all out-of-pocket costs and expenses (including the reasonable fees and expenses of their counsel) reasonably incurred by the Underwriters in connection with this Agreement and the offering contemplated hereby; provided, that a defaulting Underwriter pursuant to Section 9 hereof shall not be entitled to such reimbursement.

11. Persons Entitled to Benefit of Agreement . This Agreement shall inure to the benefit of and be binding upon the parties hereto and their respective successors and any controlling persons referred to herein, and the affiliates, officers and directors of

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each Underwriter referred to in Section 7 hereof. Nothing in this Agreement is intended or shall be construed to give any other person any legal or equitable right, remedy or claim under or in respect of this Agreement or any provision contained herein. No purchaser of Securities from any Underwriter shall be deemed to be a successor merely by reason of such purchase.

12. Survival . The respective indemnities, rights of contribution, representations, warranties and agreements of the Company, the Parent and the Underwriters contained in this Agreement or made by or on behalf of the Company, the Parent or the Underwriters pursuant to this Agreement or any certificate delivered pursuant hereto shall survive the delivery of and payment for the Securities and shall remain in full force and effect, regardless of any termination of this Agreement or any investigation made by or on behalf of the Company, the Parent or the Underwriters.

13. Certain Defined Terms . For purposes of this Agreement, (a) except where otherwise expressly provided, the term “affiliate” has the meaning set forth in Rule 405 under the Securities Act; (b) the term “business day” means any day other than a day on which banks are permitted or required to be closed in New York City; and (c) the term “subsidiary” has the meaning set forth in Rule 405 under the Securities Act.

14. Miscellaneous .

(a) Authority of the Representatives. Any action by the Underwriters hereunder may be taken by the Representatives on behalf of the Underwriters, and any such action taken by the Representatives shall be binding upon the Underwriters.

(b) Notices. All notices and other communications hereunder shall be in writing and shall be deemed to have been duly given if mailed or transmitted and confirmed by any standard form of telecommunication. Notices to the Underwriters shall be given to the Representatives c/o J.P. Morgan Securities LLC, 383 Madison Avenue, New York, New York 10179 (fax: (212)834-6081), Attention: Investment Grade Syndicate Desk – 3rd Floor, Morgan Stanley & Co. Incorporated, 1585 Broadway, 29th Floor, New York, New York 10036, Attention: Investment Banking Division (phone: (212) 761-6691, fax: (212) 507-8999), and Wells Fargo Securities, LLC, 550 South Tryon Street, 5 ^th Floor, Charlotte, North Carolina 28202 (fax: (704) 410-0326), Attention: Transaction Management. Notices to the Company shall be given to them at Columbia Property Trust Operating Partnership, L.P. c/o Columbia Property Trust, Inc., One Glenlake Parkway, Suite 1200, Atlanta, Georgia 30328 (phone: (404) 465-2200, fax: (404) 465-2201), Attention: Chief Financial Officer.

(c) Governing Law. This Agreement shall be governed by and construed in accordance with the laws of the State of New York.

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(d) Counterparts. This Agreement may be signed in counterparts (which may include counterparts delivered by any standard form of telecommunication), each of which shall be an original and all of which together shall constitute one and the same instrument.

(e) Amendments or Waivers. No amendment or waiver of any provision of this Agreement, nor any consent or approval to any departure therefrom, shall in any event be effective unless the same shall be in writing and signed by the parties hereto.

(f) Headings. The headings herein are included for convenience of reference only and are not intended to be part of, or to affect the meaning or interpretation of, this Agreement.

If the foregoing is in accordance with your understanding, please indicate your acceptance of this Agreement by signing in the space provided below.

[Signature Pages Follow]

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Very truly yours,

COLUMBIA PROPERTY TRUST OPERATING PARTNERSHIP, L.P.

By: Columbia Property Trust, Inc.

Its: General Partner

COLUMBIA PROPERTY TRUST, INC.

[Signature page to Underwriting Agreement]

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[Signature page to Underwriting Agreement]

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ANNEX A