Underwriting Agreement

EXHIBIT 1.1

Shares of 7.375% Series A Cumulative Redeemable Preferred Stock
(Liquidation Preference $25.00 Per Share)

BioMed Realty Trust, Inc.
(a Maryland Corporation)

Underwriting Agreement

January 10, 2007

WACHOVIA CAPITAL MARKETS, LLC
MORGAN STANLEY & CO. INCORPORATED
RAYMOND JAMES & ASSOCIATES, INC.

As Representatives of the Several Underwriters listed on Schedule I hereto

c/o Wachovia Capital Markets, LLC
301 South College St.
Charlotte, NC 28288

Ladies and Gentlemen:

     BioMed Realty Trust, Inc., a Maryland corporation (the “ Company ”), and BioMed Realty, L.P., a Maryland limited partnership (the “ Operating Partnership ” and together with the Company, the “ Transaction Entities ”), each confirms its agreement with each of the underwriters named in Schedule I hereto (the “ Underwriters ”) for whom Wachovia Capital Markets, LLC, Morgan Stanley & Co. Incorporated and Raymond James & Associates, Inc. are acting as representatives (the “ Representatives ”) with respect to the issuance and sale by the Company and the purchase by the Underwriters, acting severally and not jointly, of 8,000,000 shares (the “ Firm Securities ”) of the Company’s 7.375% Series A Cumulative Redeemable Preferred Stock (liquidation preference $25.00 per share), par value $.01 per share (the “ Series A Preferred Stock ”), and with respect to the grant by the Company to the Underwriters, acting severally and not jointly, of an option to purchase an aggregate of not more than 1,200,000 additional shares of Series A Preferred Stock (the “ Optional Securities ”), subject to the terms and conditions set forth below. The Firm Securities and the Optional Securities are herein collectively called the “ Offered Securities .” This agreement by and among the Company, the Operating Partnership and the Underwriters shall be referred to as this “ Agreement. ”

     The Company will contribute the net proceeds from each sale of the Offered Securities to the Operating Partnership and, in exchange therefor, at the Closing Date (as defined herein) of each such sale, the Operating Partnership will issue to the Company series A preferred units of limited partnership interest in the Operating Partnership having an aggregate liquidation preference equal to the aggregate liquidation preference of such Offered Securities and having

economic terms substantially equivalent to the economic terms of the Offered Securities (“ Series A Units ”).

     The Company has filed with the Securities and Exchange Commission (the “ Commission ”) an automatic shelf registration statement on Form S-3 (No. 333-137376) covering the registration of the Offered Securities under the Securities Act of 1933, as amended (the “ Act ”). Such registration statement became effective upon filing under Rule 462(e) of the rules and regulations of the Commission under the Act (the “ Securities Act Regulations ”) on September 15, 2006. Promptly after execution and delivery of this Agreement, the Company will prepare and file a prospectus in accordance with the provisions of Rule 430B of the Securities Act Regulations (“ Rule 430B ”) and paragraph (b) of Rule 424 (“ Rule 424(b) ”) of the Securities Act Regulations. Any information included in such prospectus that was omitted from such registration statement at the time it became effective but that is deemed to be part of and included in such registration statement pursuant to Rule 430B is referred to as “ Rule 430B Information .”

     Each prospectus used in connection with the offering of Offered Securities that omitted Rule 430B Information is herein called a “preliminary prospectus.” Such registration statement, at any given time, including the amendments thereto to such time, the exhibits and any schedules thereto at such time, the documents incorporated by reference thereto pursuant to Item 12 of Form S-3 under the Act at such time and the documents otherwise deemed to be a part thereof or included therein by the Securities Act Regulations, and the Rule 430B Information is herein called the “ Registration Statement .” The Registration Statement at the time it originally became effective is herein called the “ Original Registration Statement .” The final prospectus in the form first furnished (electronically or otherwise) to the Underwriters for use in connection with the offering of the Offered Securities (whether to meet the requests of purchasers pursuant to Rule 173 under the Act or otherwise), including the documents incorporated by reference therein pursuant to Item 12 of Form S-3 under the Act at the time of execution of this Agreement, and any preliminary prospectuses that form a part thereof, is herein called the “ Prospectus .” The Commission has not issued any order preventing or suspending the use of any preliminary prospectus.

     For purposes of this Agreement (other than in connection with any opinion given by counsel in Section 5 hereof, which hereby expressly excludes any copy filed via Electronic Data Gathering, Analysis and Retrieval System (“ EDGAR ”)), all references to the “ Original Registration Statement, ” “ Registration Statement, ” the “ Prospectus, ” any “ preliminary prospectus, ” or any amendment or supplement to any of the foregoing shall be deemed to include the copy filed with the Commission pursuant to EDGAR.

     All references in this Agreement to financial statements and schedules and other information which is “contained,” “included” or “stated” in the Registration Statement, any preliminary prospectus or the Prospectus (or other references of like import) shall be deemed to mean and include all such financial statements and schedules and other information which is incorporated by reference in or otherwise deemed by Securities Act Regulations to be a part of or included in the Registration Statement, any preliminary prospectus or the Prospectus, as the case may be; and all references in this Agreement to amendments or supplements to the Registration

Statement, any preliminary prospectus or the Prospectus shall be deemed to mean and include the filing of any document under the Securities Exchange Act of 1934, as amended (the “ Exchange Act ”) which is incorporated by reference in or otherwise deemed by Securities Act Regulations to be a part of or included in the Registration Statement, such preliminary prospectus or the Prospectus, as the case may be.

1. Representations and Warranties of the Transaction Entities . Each of the Transaction Entities, jointly and severally, represents and warrants to, and agrees with, the several Underwriters as of the date hereof, the Applicable Time referred to in Section 1.A hereof, and as of each respective Closing Date referred to in Section 2 hereof, that:

     A.  Status as a Well-Known Seasoned Issuer; Registration Statement Effective; Conform to Act; No Misleading Statements; Conformity with EDGAR filings.

     (1) (A) At the time of filing the Original Registration Statement, (B) at the time the Company or any person acting on its behalf (within the meaning, for this clause only, of Rule 163(c) of the Securities Act Regulations) made any offer relating to the Offered Securities in reliance on the exemption of Rule 163 of the Securities Act Regulations and (C) at the date hereof, the Company (x) was and is a “well-known seasoned issuer” as defined in Rule 405 of the Securities Act Regulations (“ Rule 405 ”) and (y) was not and is not an “ineligible issuer,” as defined in Rule 405. The Registration Statement is an “automatic shelf registration statement,” as defined in Rule 405, and the Offered Securities, since their registration on the Registration Statement, have been and remain eligible for registration by the Company on a Rule 405 “automatic shelf registration statement”. The Company has not received from the Commission any notice pursuant to Rule 401(g)(2) of the Securities Act Regulations objecting to the use of the automatic shelf registration statement form.

     At the time of filing the Original Registration Statement, at the earliest time thereafter that the Company or another offering participant made a bona fide offer (within the meaning of Rule 164(h)(2) of the Securities Act Regulations) of the Offered Securities and at the date hereof, the Company was not and is not an “ineligible issuer,” as defined in Rule 405.

     (2) The Original Registration Statement became effective upon filing under Rule 462(e) of the Securities Act Regulations (“ Rule 462(e) ”) on September 15, 2006, and any post-effective amendment thereto also became effective upon filing under Rule 462(e).

     Any offer that is a written communication relating to the Offered Securities made prior to the filing of the Original Registration Statement by the Company or any person acting on its behalf (within the meaning, for this paragraph only, of Rule 163(c) of the Securities Act Regulations) has been filed with the Commission in accordance with the exemption provided by Rule 163 of the Securities Act Regulations (“ Rule 163 ”) and otherwise complied with the requirements of Rule 163, including without limitation the legending requirement, to qualify such offer for the exemption from Section 5(c) of the Act provided by Rule 163.

     At the respective times the Original Registration Statement and any amendment thereto became effective, at the deemed effective date with respect to the Underwriters pursuant to Rule 430B(f)(2) of the Securities Act Regulations, at the date of this Agreement and at each relevant Closing Date, the Registration Statement and any amendments or supplements thereto complied and will comply, in all material respects with the requirements of the Act and the Securities Act Regulations and did not and will not contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading; the Prospectus and any further amendments or supplements thereto, at the time the Prospectus or such amendment or supplement was issued, at the date hereof, at the time of filing pursuant to Rule 424(b) and at each relevant Closing Date, complied and will comply, in all material respects with the requirements of the Act and the Securities Act Regulations and did not, and any amendment thereto will not, contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading; and each preliminary prospectus and the prospectus filed as part of the Original Registration Statement as originally filed or as part of any amendment or supplement thereto or filed pursuant to Rule 424 of the Securities Act Regulations, complied when so filed in all material respects with the Act and the Securities Act Regulations;

     (3) As of the Applicable Time (as defined below), neither (x) the Issuer General Use Free Writing Prospectus(es) (as defined below) identified on Schedule III hereto and the Statutory Prospectus (as defined below), all considered together (collectively, the “ General Disclosure Package ”), nor (y) any individual Issuer Limited Use Free Writing Prospectus, when considered together with the General Disclosure Package, included any untrue statement of a material fact or omitted 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.

As used in this subsection and elsewhere in this Agreement:

     “ Applicable Time ” means 4:30 p.m. (Eastern time) on January 10, 2007 or such other time as agreed by the Company and the Representatives.

     “ Issuer Free Writing Prospectus ” means any “issuer free writing prospectus,” as defined in Rule 433 of the Securities Act Regulations (“ Rule 433 ”), relating to the Offered Securities that (i) is required to be filed with the Commission by the Company, (ii) is a “road show for an offering that is a written communication” within the meaning of Rule 433(d)(8)(i), whether or not required to be filed with the Commission or (iii) is exempt from filing pursuant to Rule 433(d)(5)(i) because it contains a description of the Offered Securities or of the offering that does not reflect the final terms, in each case in the form filed or required to be filed with the Commission or, if not required to be filed, in the form retained in the Company’s records pursuant to Rule 433(g).

     “ Issuer General Use Free Writing Prospectus ” means any Issuer Free Writing Prospectus that is intended for general distribution to prospective investors.

     “ Issuer Limited Use Free Writing Prospectus ” means any Issuer Free Writing Prospectus that is not an Issuer General Use Free Writing Prospectus.

     “ Statutory Prospectus ” as of any time means the prospectus relating to the Offered Securities that is included in the Registration Statement immediately prior to that time, including any document incorporated by reference therein and any preliminary or other prospectus deemed to be a part thereof.

     As of the time of the filing of the Final Term Sheet (as defined in Section 4.C), the General Disclosure Package, when considered together with the Final Term Sheet, will not 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 are made, not misleading.

     Each Issuer Free Writing Prospectus, as of its issue date and at all subsequent times through the completion of the public offer and sale of the Offered Securities or until any earlier date that the issuer notified or notifies the Representatives as described in Section 4.C, did not, does not and will not include any information that conflicted, conflicts or will conflict with the information contained in the Registration Statement or the Prospectus, including any document incorporated by reference therein and any preliminary or other prospectus deemed to be a part thereof that has not been superseded or modified.

     The representations and warranties in Section 1.A(2) and (3) of this Agreement shall not apply to statements in or omissions from the Registration Statement, the Prospectus or any Issuer Free Writing Prospectus made in reliance upon and in conformity with written information furnished to the Company by any Underwriter through the Representatives expressly for use therein.

     (4) Each Prospectus and preliminary prospectus delivered to the Underwriters and used in connection with this offering was identical to the electronically transmitted copies thereof filed with the Commission pursuant to EDGAR, except to the extent permitted by Regulation S-T under the Act.

     B.  No Stop Order . No stop order suspending the effectiveness of the Registration Statement or any part thereof has been issued and no proceeding for that purpose has been instituted or, to the knowledge of either of the Transaction Entities, threatened by the Commission or by the state securities authority of any jurisdiction. No order preventing or suspending the use of the Prospectus has been issued, and no proceeding for that purpose has been instituted or, to the knowledge of either of the Transaction Entities, threatened by the Commission or by the state securities authority of any jurisdiction.

     C.  Incorporated Documents . Each document incorporated or deemed to be incorporated by reference in the Prospectus or the Registration Statement (the “ Incorporated

Documents ”), when such Incorporated Document was filed with the Commission, complied in all material respects with the requirements of the Act and the Securities Act Regulations or the Exchange Act and the rules and regulations of the Commission thereunder (the “ Exchange Act Regulations ”), as applicable, in effect at the time of the filing, and, when read together with the other information in the Prospectus, (i) at the time the Original Registration Statement became effective, (ii) at the earlier of the time the Prospectus was first used and the date and time of the first contract of sale of Offered Securities in this offering, and (iii) at each Closing Date, each such Incorporated Document did not or will not, as the case may be, contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein, in light of the circumstances under which they were made, not misleading.

     D.  Company Formation; Good Standing; Qualification . The Company has been duly formed and is validly existing as a corporation in good standing under the laws of the state of Maryland, with power and authority (corporate and other) to own its properties and conduct its business as described in the Prospectus and to enter into and perform its obligations under this Agreement and as general partner of the Operating Partnership to cause the Operating Partnership to enter into and perform the Operating Partnership’s obligations under this Agreement, and the Company is duly qualified to do business as a foreign corporation in good standing in all other jurisdictions in which its ownership or lease of property or the conduct of its business requires such qualification, except where the failure to so qualify would not reasonably be expected to have, individually or in the aggregate, a material adverse effect on the condition (financial or other), business, earnings, properties, assets, results of operations or prospects of the Transaction Entities and the Subsidiaries (as defined below) taken as a whole, whether or not in the ordinary course (“ Material Adverse Effect ”).

     E.  Operating Partnership Formation; Good Standing; Qualification; Interests in Operating Partnership . The Operating Partnership has been duly formed and is validly existing as a limited partnership in good standing under the laws of the state of Maryland, is duly qualified to do business and is in good standing as a foreign limited partnership in each jurisdiction in which its ownership or lease of property or the conduct of its business requires such qualification, except where the failure to so qualify would not reasonably be expected to have a Material Adverse Effect, and has all power and authority necessary to own its properties and conduct its business as described in the Prospectus and to enter into and perform its obligations under this Agreement. The Company is the sole general partner of the Operating Partnership and holds the number and/or percentage of units of limited partnership interest in the Operating Partnership (“ OP Units ”) as disclosed in the Prospectus, as of the dates set forth therein, free and clear of any security interests, liens, mortgages, encumbrances, pledges, claims, defects or other restrictions of any kind (collectively, “ Liens ”). The Third Amended and Restated Agreement of Limited Partnership of the Operating Partnership, as amended (the “ Operating Partnership Agreement ”) is in full force and effect. The aggregate percentage interests of the Company and the limited partners in the Operating Partnership are as set forth in the Prospectus; provided , that to the extent any portion of the over-allotment option described in Section 2 hereof is exercised at the First Closing Date, the percentage interest of the Company and of such limited partners in the Operating Partnership will be adjusted accordingly.

     F.  Subsidiary Formation; Good Standing; Qualification; Liens; Pre-Emptive Rights . Each direct or indirect subsidiary of the Company and of the Operating Partnership, all of which are listed on Schedule II hereto (each, a “ Subsidiary ” and together the “ Subsidiaries ”), has been duly formed and is validly existing as a corporation, limited partnership or limited liability company, as the case may be, in good standing under the laws of the jurisdiction of its organization, with power and authority (corporate and other) to own its assets and conduct its business as described in the Prospectus and to enter into and to perform its obligations under this Agreement; and is duly qualified to do business as a foreign corporation in good standing in all other jurisdictions in which its ownership or lease of property or the conduct of its business requires such qualification, except where the failure to so qualify would not reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect; all of its issued and outstanding capital stock or other ownership interests have been duly authorized and validly issued and are fully paid and non-assessable; and all outstanding shares of its capital stock or other ownership interests are owned by the Company or the Operating Partnership, directly or through the Subsidiaries, free and clear of any Liens, except as described in the Prospectus or where such Liens would not reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect. None of the equity interests of any Subsidiary were issued in violation of the preemptive or other similar rights of any securityholder of such Subsidiary. There are no outstanding options, rights (preemptive or otherwise) or warrants to purchase or subscribe for equity interests or other securities of any Subsidiary, except as set forth in the organizational documents of such Subsidiary.

     G.  Capital of the Company; Options; No Preemptive Rights . The authorized, issued and outstanding capital stock of the Company is in all material respects as set forth in the Prospectus in the column entitled “Historical Consolidated” under the caption “Capitalization.” None of the outstanding shares of capital stock of the Company was issued in violation of the preemptive or other similar rights of any securityholder of the Company. Except as disclosed in the Prospectus: (i) except for shares of Common Stock reserved for issuance (A) upon exchange or redemption of the OP Units, (B) in connection with the BioMed Realty Trust, Inc. and BioMed Realty, L.P. 2004 Incentive Award Plan (the “ Equity Incentive Plan ”), or (C) upon exchange of the Operating Partnership’s $175 million principal amount of 4.50% Exchangeable Senior Notes due 2026 (the “ Exchangeable Notes ”), no shares of Common Stock are reserved for any purpose; (ii) except for the OP Units and the Exchangeable Notes, there are no outstanding securities convertible into or exchangeable for any shares of Common Stock; and (iii) except for the Exchangeable Notes and certain existing joint venture agreements, there are no outstanding options, rights (preemptive or otherwise) or warrants to purchase or subscribe for shares of Common Stock or any other securities of the Company or of the Operating Partnership.

     H.  Authorization of Issuance of Offered Securities; Conformity with Applicable Laws . The Offered Securities and all other outstanding shares of capital stock of the Company have been duly authorized; all outstanding shares of capital stock of the Company are, and, when the Offered Securities have been delivered and paid for in accordance with this Agreement on each Closing Date, such Offered Securities will have been, validly issued, fully paid and non-assessable, have been, or will be, offered and sold in compliance with all applicable federal and state securities laws and will conform in all material respects to the description thereof contained in the Prospectus. At or prior to the Closing Date, the Company will have executed and filed, articles supplementary to the Company’s Articles of Amendment and Restatement, dated as of

August 5, 2004, as amended and supplemented, with the Maryland State Department of Assessments and Taxation establishing the terms of the Offered Securities (the “ Articles Supplementary ”). The Offered Securities conform in all material respects to all statements relating thereto contained in the Prospectus, and such statements conform in all material respects to the rights set forth in the Articles Supplementary. Upon payment of the purchase price and delivery of the Offered Securities in accordance herewith, the Underwriters will receive good valid and marketable title to the Offered Securities, free and clear of all Liens. The form of the certificates to be used to evidence the Offered Securities will be in substantially the form filed or incorporated by reference as an exhibit to the Registration Statement, is in due and proper form and complies with all applicable legal requirements, the requirements of the charter and bylaws of the Company and the requirements of the New York Stock Exchange, Inc. (the “ NYSE ”).

     I.  Authorization of Issuance of OP Units and Series A Units; Conformity with Applicable Laws; No Preemptive Rights . The issued and outstanding OP Units have been duly authorized for issuance by the Operating Partnership to the holders thereof and are validly issued, fully paid and non-assessable, have been offered and sold or exchanged by the Operating Partnership in compliance with applicable laws and conform in all material respects to the description thereof contained in the Prospectus. The Series A Units to be issued to the Company in connection with the offering contemplated by this Agreement have been duly authorized for issuance by the Operating Partnership and, when issued and delivered by the Operating Partnership to the Company in connection with the contribution of the net proceeds of the offering, will be validly issued, fully paid and non-assessable. The Series A Units will be exempt from registration or qualification under the Act and applicable state securities laws. None of such Series A Units will be subject to or issued in violation of the preemptive or other similar rights of any securityholder of the Operating Partnership.

     J.  No Other Brokerage Fees . Except as disclosed in the Prospectus, there are no contracts, agreements or understandings between the Transaction Entities, any Subsidiary and any person that would give rise to a valid claim against the Transaction Entities, any Subsidiary, or any Underwriter for a brokerage commission, finder’s fee or other like payment in connection with this offering.

     K.  No Registration Rights . Except for the Registration Rights Agreements entered into in connection with the Company’s initial public offering by and among the Company, the Operating Partnership and the holders of OP Units party thereto dated as of August 13, 2004, as amended (the “ Unitholder Registration Rights Agreements ”), the Registration Rights Agreement entered into in connection with the issuance of the Exchangeable Notes by and among the Company and the initial purchasers of the Exchangeable Notes dated as of September 25, 2006 (the “ Notes Registration Rights Agreement ”) and the warrant dated as of August 11, 2004 granted to Raymond James (the “ Raymond James Warrant ”), there are no contracts, agreements or understandings between the Transaction Entities and any person granting such person the right to require the Transaction Entities to file a registration statement under the Act with respect to any securities of the Transaction Entities owned or to be owned by such person or to require the Transaction Entities to include such securities in the securities registered pursuant to the Registration Statement or in any securities being registered pursuant to any other registration statement filed by the Transaction Entities under the Act.

     L.  No Violations or Defaults . None of the Transaction Entities nor the Subsidiaries, (i) is in violation of its charter or by-laws or other similar organizational documents, (ii) is in default (whether with or without the giving of notice or passage of time or both) in the performance or observance of any obligation, agreement, term, covenant or condition contained in a contract, indenture, mortgage, deed of trust, loan or credit agreement, note, lease (under which such Transaction Entity or a Subsidiary is landlord or otherwise), ground lease or air space lease (under which such Transaction Entity or a Subsidiary is tenant), development agreement, reciprocal easement agreement, deed restriction, hotel management agreement, parking management agreements, or other agreement or instrument to which it is a party or by which it or any of them is a party or may be bound, or to which any of the Properties (as hereinafter defined) or any of its property or assets of such Transaction Entity or Subsidiary is subject (collectively, “ Agreements or Instruments ”), or (iii) is in violation of any law, ordinance, governmental rule, regulation or court decree to which it or the Properties or any of its other properties or assets may be subject, except for such defaults or violations that would not have, individually or in the aggregate, a Material Adverse Effect.

     M.  No Consents Required . No consent, approval, authorization, or order of, or filing or registration with, any governmental agency or body or any court or any third party is required for the consummation of the transactions contemplated by this Agreement, except as have been obtained or made under the Act and as may be required under state securities laws or the rules of the National Association of Securities Dealers, Inc. (the “ NASD ”) or that the absence of which would not reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect.

     N.  Non-Contravention . Except as disclosed in the Prospectus, the execution, delivery and performance of this Agreement by the Transaction Entities and the consummation of the transactions contemplated hereby (including the issuance and sale of the Offered Securities and the use of the proceeds from the sale of the Offered Securities as described in the Prospectus under “Use of Proceeds”) do not and will not (whether with or without the giving of notice or passage of time or both) conflict with or result in a breach or violation of any of the terms and provisions of, or constitute a default (or give rise to any right of termination, acceleration, cancellation, repurchase or redemption) or Repayment Event (as hereinafter defined) under, or result in the creation or imposition of a Lien upon any property or assets of the Transaction Entities or any Subsidiary pursuant to, (i) any statute, any rule, regulation or order of any governmental agency or body or any court, domestic or foreign, having jurisdiction over the Transaction Entities or any of the Subsidiaries or any of their properties, assets or business currently owned by them; (ii) any term, condition or provision of any Agreements or Instruments; or (iii) the charters, by-laws or other organizational documents, as applicable, of the Transaction Entities or any of the Subsidiaries, except for such conflicts, breaches, violations or defaults that (with respect to subclauses (i) and (ii) above) would not reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect. As used herein, “ Repayment Event ” means any event or condition which, without regard to compliance with any notice or other procedural requirements, gives the holder of any note, debenture or other evidence of indebtedness (or any person acting on such holder’s behalf) the right to require the repurchase, redemption or repayment of all or a portion of such indebtedness by the Company, the Operating Partnership or any Subsidiary.

     O.  Validity and Sufficiency of Agreements . This Agreement has been duly and validly authorized, executed and delivered by each of the Transaction Entities party thereto, and the Operating Partnership Agreement is a valid and binding agreement of each of the Transaction Entities that are parties thereto, enforceable against such Transaction Entity in accordance with its terms, except (i) to the extent that such enforceability may be limited by applicable bankruptcy, insolvency, fraudulent transfer, moratorium, reorganization or other similar laws now or hereafter in effect relating to or affecting creditors’ rights; (ii) as limited by the effect of general principles of equity, whether enforcement is considered in a proceeding in equity or at law (including the possible unavailability of specific performance or injunctive relief), concepts of materiality, reasonableness, good faith and fair dealing, and the discretion of the court before which any proceeding therefore may be brought; (iii) the unenforceability under certain circumstances under law or court decisions of provisions providing for the indemnification of or contribution to a party with respect to a liability where such indemnification or contribution is contrary to public policy; and (iv) the unenforceability of any provision requiring the payment of attorney’s fees, except to the extent that a court determines such fees to be reasonable.

     P.  Licenses . The Transaction Entities and the Subsidiaries possess adequate certificates, authorities, licenses, consents, approvals, permits and other authorizations (“ Licenses ”) issued by appropriate governmental agencies or bodies or third parties necessary to conduct the business now operated by them, have maintained such Licenses in full force and effect, and have not received any notice of proceedings relating to the revocation or modification of any such Licenses that, if determined adversely to the Transaction Entities or any of the Subsidiaries, would reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect. The Transaction Entities and the Subsidiaries are in compliance with the terms and conditions of all such Licenses except as would not reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect.

     Q.  Financial Statements . The financial statements included in or incorporated by reference into the Registration Statement, the Prospectus and the General Disclosure Package, together with the related schedules and notes, present fairly (1) the financial position of the Company and its consolidated Subsidiaries (and the combined financial position of any predecessor entities) at the dates indicated; (2) the results of operations, stockholders’ equity and cash flows of the Company and its consolidated Subsidiaries (and the combined results of operations, stockholders’ equity, and cash flows of any predecessor entities) for the periods specified; and (3) the revenues and certain expenses of certain of the acquisition properties for the periods specified; said financial statements have been prepared in conformity with U.S. generally accepted accounting principles (“ GAAP ”) applied on a consistent basis throughout the periods involved; said financial statements have been prepared on a consistent basis with the books and records of the Company and its consolidated Subsidiaries (and any predecessor entities) in the case of the statements of financial position of the Company and its consolidated Subsidiaries (and the combined financial position of any predecessor entities) and the results of operations, stockholders’ equity and cash flows of the Company and its consolidated Subsidiaries (and the combined results of operations, stockholders’ equity, and cash flows of any predecessor entities). The supporting schedules incorporated by reference into the Registration Statement, the Prospectus and General Disclosure Package present fairly in accordance with GAAP the information required to be stated therein. The unaudited pro forma consolidated financial statements and the related notes thereto included in or incorporated by reference into

the Registration Statement, the Prospectus and the General Disclosure Package (the “ Pro Forma Financial Statements ”) have been prepared in accordance with the applicable requirements of Rules 11-01 and 11-02 of Regulation S-X under the Act, and, in the opinion of the Company, the assumptions used in the preparation thereof are reasonable and provide a reasonable basis for presenting the significant effects directly attributable to the transactions or events described therein, and the related adjustments used therein give appropriate effect to the transactions and circumstances referred to therein and the pro forma columns therein reflect the proper application of these adjustments to the corresponding historical financial statement amounts. All non-GAAP financial measures included in or incorporated by reference into the Registration Statement, the Prospectus and the General Disclosure Package comply with the requirements of Regulation G and Item 10 of Regulation S-K under the Act to the extent such rules are applicable to such financial statements. Other than the historical financial statements, financial statements prepared in accordance with Rule 3-14 of Regulation S-X under the Act, Pro Forma Financial Statements, and schedules relating thereto included in or incorporated by reference into the Registration Statement, the Prospectus and the General Disclosure Package, no other historical or pro forma financial statements (or schedules) are required by the Act or the Securities Act Regulations to be included therein or in any document required to be filed with the Commission under the Exchange Act or the Exchange Act Regulations.

     R.  Independent Registered Public Accounting Firm . The accountants who certified the financial statements and supporting schedules included in or incorporated by reference into the Registration Statement and delivered the initial letter referred to in Section 5.A hereof, are an independent registered public accounting firm as required by the Act, the Securities Act Regulations, the Exchange Act, the Exchange Act Regulations, and the Public Company Accounting Oversight Board (United States).

     S.  REIT Status . Commencing with the taxable year ending December 31, 2004, the Company has been and is organized and operated in conformity with the requirements for qualification and taxation as a real estate investment trust (a “ REIT ”) under the Internal Revenue Code 1986, as amended (the “ Code ”).

     T.  Tax Returns and Matters . The Transaction Entities and each of the Subsidiaries (including any predecessor entities) have filed all foreign, federal, state and local tax returns that are required to be filed or have requested extensions thereof (except in any case in which the failure so to file would not reasonably be expected to have a Material Adverse Effect) and have paid all taxes required to be paid by them and any other assessment, fine or penalty levied against them, to the extent that any of the foregoing is due and payable, except for any such assessment, fine or penalty that (i) is currently being contested in good faith, (ii) would not reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect or (iii) as described in or contemplated by the Prospectus. Except as disclosed in the Prospectus, there is no pending or, to the knowledge of the Transaction Entities, threatened special assessment, tax reduction proceeding or other action which could increase or decrease the real property taxes or assessments of any Property, which would reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect.

     U.  No Other Offering Documents or Prospectuses . The Transaction Entities and each of the Subsidiaries have not distributed, and prior to the later of the First Closing Date and

the completion of the distribution of the Offered Securities, will not distribute, any offering material in connection with the offering or sale of the Offered Securities other than the Registration Statement, the Prospectus, the General Disclosure Package or any other materials, if any, permitted by the Act (which were disclosed to the Representatives and their counsel).

     V.  ERISA Matters .

     (1) Each Transaction Entity is in compliance, in all material respects, with all presently applicable provisions of the Employee Retirement Income Security Act of 1974, as amended, including the regulations and published interpretations thereunder (“ ERISA ”); no “reportable event” (as defined in ERISA other than an event for which the notice requirements have been waived by regulations) has occurred with respect to any “pension plan” (as defined in ERISA) for which any Transaction Entity would have any liability; no Transaction Entity has incurred or expects to incur liability under (i) Title IV of ERISA with respect to termination of, or withdrawal from, any “pension plan” or (ii) Sections 412 or 4971 of the Code including the regulations and published interpretations thereunder; and each “pension plan” for which any Transaction Entity would have any liability that is intended to be qualified under Section 401(a) of the Code has received a favorable determination letter from the Internal Revenue Service that such plan is so qualified in all material respects and, except to the knowledge of the Transaction Entities, nothing has occurred, whether by action or by failure to act, which would cause the loss of such qualification, except where such non-compliance, reportable events, liabilities or failure to be so qualified would not reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect.

     (2) The assets of the Transactions Entities and the Subsidiaries do not constitute “plan assets” of an ERISA regulated employee benefit plan.

     (3) The Company is a “real estate operating company” as such term is defined in paragraph (e) of the plan assets regulation in 29 C.F.R. Section 2510.3-101, or will be an “operating company” as defined in the first sentence of paragraph (c) thereof.

     W.  Property Matters .

     (1) The Transaction Entities or the Subsidiaries have good and marketable title (either in fee simple or pursuant to a leasehold interest) to all of the properties owned or leased by them (the “ Properties ”), in each case, free and clear of all Liens except such as (i) are disclosed in the Prospectus; or (ii) would not reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect. Any real property, improvements, equipment and personal property held under lease by the Company or any Subsidiary are held under valid, existing and enforceable leases which are in full force and effect, and none of the Company, Operating Partnership nor any Subsidiary or, to any Transaction Entity’s knowledge, any other party, is in default under any such lease, with such exceptions as are disclosed in the Prospectus or would not reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect;

     (2) All of the leases and subleases under which the Company, Operating Partnership or any Subsidiary lease any portion of the Properties are in full force and effect; there are no uncured events of default, or events that with the giving of notice or passage of time, or both, would constitute an event of default, by any Transaction Entity nor any tenant under any of the terms and provisions of the leases described above; and none of the Company, Operating Partnership nor any Subsidiary has received any notice of any claim asserted by anyone adverse to the rights of the Company, Operating Partnership or Subsidiary under any of the leases or questioning or affecting the rights of the tenant of the continued possession of the leased or subleased premises under any such lease or sublease, in each case other than those that would not reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect. Other than Centocor, Inc., no tenant which has been specifically identified in the Prospectus under any of the leases at the Properties has a right of first refusal to purchase the premises demised under such lease;

     (3) Except as disclosed in the Prospectus, none of the Transaction Entities, nor any Subsidiary, knows of any violation of any municipal, state or federal law, rule or regulation (including those pertaining to environmental matters) concerning the Properties or any part thereof which would reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect;

     (4) Each of the Properties complies with all applicable zoning laws, ordinances, regulations, and deed restrictions or other covenants in all material respects and, if and to the extent there is a failure to comply, such failure would not reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect;

     (5) None of the Transaction Entities, nor any Subsidiary, has received from any governmental authority any written notice of any condemnation of or zoning change affecting the Properties or any part thereof, and none of the Transaction Entities nor any Subsidiary or predecessor entity knows of any such condemnation or zoning change that is threatened against any of the Properties and that, if consummated, would reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect;

     (6) Each of the Properties is free of material structural defects and all building systems contained therein are in good working order in all material respects, subject to ordinary wear and tear, except as would not reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect, or, in each instance, the Company maintains adequate reserves to effect reasonably required repairs, maintenance and capital expenditures; and

     (7) Water, stormwater, sanitary sewer, electricity and telephone service are all available at the property lines of each Property over duly dedicated streets or perpetual easements of record benefiting the applicable Property, except as would not reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect.

     X.  No Participating Interests . The mortgages and deeds of trust encumbering the Properties and assets described in the Prospectus are not convertible, and neither the Transaction

Entities, any of the Subsidiaries, nor any person affiliated therewith holds a participating interest therein, and such mortgages and deeds of trust are not cross-defaulted or cross-collateralized to any property not owned directly or indirectly by the Transaction Entities or any of the Subsidiaries.

     Y.  Insurance . The Operating Partnership and any Subsidiary that owns, or leases under ground leases, real property has obtained title insurance on the fee interests (or leasehold interests) in each of the Properties and other insurance covering such risks and in amounts that are commercially reasonable for the assets owned by them, and in each case such title insurance and other insurance is in full force and effect. Neither the Transaction Entities nor any of the Subsidiaries has any reason to believe that any of them will not be able to obtain or renew its existing insurance coverage as and when required by the preceding or as and when such coverage expires or to obtain similar coverage from similar insurers as may be necessary to continue its business.

     Z.  Environmental Matters . Except as otherwise disclosed in the Prospectus or in Phase I Environmental Audits previously delivered or made available to the Underwriters or their counsel (the “ Environmental Audits ”),

     (1) none of the Transaction Entities, any of the Subsidiaries nor, to the best knowledge of the Transaction Entities, any other owners of each Property at any time or any other party has at any time handled, stored, treated, transported, manufactured, transferred or otherwise dealt with, Hazardous Materials (as hereinafter defined) on, to or from the Properties, other than by any such action taken in compliance with all applicable Environmental Laws;

     (2) none of the Transaction Entities, any of the Subsidiaries nor, to the best knowledge of the Transaction Entities, any other owners of each Property at any time or any other party has at any time spilled, leaked, discharged, dumped, released, or otherwise disposed of Hazardous Materials on, to or from the Properties, except where such events would not reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect;

     (3) the Transaction Entities do not intend to use the Properties or any subsequently acquired properties, or to lease the Properties or any subsequently acquired properties to any party that will use such Properties or any subsequently acquired properties, for the purpose of handling, storing, treating, transporting, manufacturing, transferring or otherwise dealing with Hazardous Materials other than by any such action taken in compliance with all applicable Environmental Laws;

     (4) the Transaction Entities do not intend to use the Properties or any subsequently acquired properties, or to lease the Properties or any subsequently acquired properties to any party that will use such Properties or any subsequently acquired properties, for the purpose of spilling, leaking, releasing, discharging, dumping, or otherwise disposing of Hazardous Materials on or from such Properties;

     (5) none of the Transaction Entities nor any of the Subsidiaries knows of any seepage, leak, discharge, release, emission, spill, or dumping of Hazardous Materials into soil or waters (including, but not limited to, groundwater and surface water) on or adjacent to the Properties or any other real property owned or occupied by any such party, or onto lands from which Hazardous Materials might seep, flow or drain into such waters, except where such events would not reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect;

     (6) none of the Transaction Entities nor any of the Subsidiaries has received any notice of or is aware of any receipt by any other party of a notice of, or has any knowledge of any occurrence or circumstance that would give rise to a claim under or pursuant to any Environmental Law, pertaining to Hazardous Materials on or originating from any of the Properties or any assets described in the Prospectus (or, the most recent preliminary prospectus) or any other real property owned or occupied by any such party or arising out of the conduct of any such party, including without limitation a claim under or pursuant to any Environmental Law (as hereinafter defined);

     (7) none of the Transaction Entities nor any of the Subsidiaries has (A) been notified that it is potentially liable under or (B) received any requests for information or other correspondence concerning any site or facility under, nor has, to the best knowledge of the Transaction Entities, any seller of the Acquisition Properties, received any notice that it is considered potentially liable under CERCLA or any similar law;

     (8) none of the Properties are included or, to the best of the Transaction Entities’ knowledge, proposed for inclusion on the National Priorities List issued pursuant to CERCLA (as hereinafter defined) by the United States Environmental Protection Agency (the “ EPA ”) or, to the best of the Transaction Entities’ knowledge, proposed for inclusion on any similar list or inventory issued pursuant to any other Environmental Law or issued by any other Governmental Authority (as hereinafter defined);

     (9) the Transaction Entities do not intend to use the Properties or other assets owned by the Transaction Entities or the Subsidiaries other than in compliance with applicable Environmental Laws;

     (10) to the knowledge of the Transaction Entities, the Properties contain no above-ground and underground storage tanks, oil/water separators, sumps, or septic systems; and

     (11) (a) to the knowledge of the Transaction Entities, no building or other improvement located on the Properties contains any asbestos or asbestos-containing materials; (b) to the knowledge of the Transaction Entities, all asbestos or asbestos-containing materials are managed, handled, treated, and removed in compliance with Environmental Law; and (c) the Transaction Entities do not intend to manage, handle, treat, or remove asbestos other than in compliance with Environmental Law.

     As used herein, “ Hazardous Material ” means any chemical, substance, waste, material, pollutant, contaminant, equipment or fixture defined as or deemed hazardous or toxic or otherwise regulated under any Environmental Law, including, without limitation, RCRA hazardous wastes, CERCLA hazardous substances, pesticides and other agricultural chemicals, oil and petroleum products or byproducts and any constituents thereof, urea formaldehyde insulation, lead in paint or drinking water, asbestos, and polychlorinated biphenyls (PCBs).

     As used herein, “ Environmental Laws ” means all codes, laws (including, without limitation, common law), ordinances, regulations, reporting or licensing requirements, rules, or statutes in effect as of the Effective Date relating to pollution or protection of human health or the environment (including ambient air, surface water, ground water, land surface, or subsurface strata), including, without limitation (i) the Comprehensive Environmental Response Compensation and Liability Act, 42 U.S.C. §§9601 et seq . (“ CERCLA ”); (ii) the Solid Waste Disposal Act, as amended by the Resource Conservation and Recovery Act, 42 U.S.C. §§6901 et seq., (“ RCRA ”); (iii) the Emergency Planning and Community Right to Know Act (42 U.S.C. §§11001 et seq.); (iv) the Clean Air Act (42 U.S.C. §§ 7401 et seq.); (v) the Clean Water Act (33 U.S.C. §§1251 et seq.); (vi) the Toxic Substances Control Act (15 U.S.C. §§2601 et seq.); (vii) the Hazardous Materials Transportation Act (49 U.S.C. §§ 5101 et seq.); (viii) the Safe Drinking Water Act (41 U.S.C. §§300f et seq.); (ix) any state, county, municipal or local statues, laws or ordinances similar or analogous to the federal statutes listed in parts (i) through (viii), inclusive, of this subparagraph, (x) any amendments to the statutes, laws or ordinances listed in parts (i) through (ix), inclusive of this subparagraph, (xi) any rules, regulations, enforceable guidelines or directives, orders or the like adopted pursuant to or implementing the statutes, laws, ordinances and amendments listed in parts (i) through (x), inclusive of this subparagraph; and (xii) any other law, statute, ordinance, amendment, rule, regulation, guideline, directive, order or the like relating to environmental, health or safety matters.

     As used herein, a “ Governmental Authority ” means any federal, state, or local governmental authority having or claiming jurisdiction over the properties and assets described in the Prospectus.

     AA.  Independence of Environmental Consultants . None of the environmental consulta