PRENTISS PROPERTIES TRUST/MD
8-K, 1998-02-25
REAL ESTATE INVESTMENT TRUSTS
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================================================================================
                                        
                       SECURITIES AND EXCHANGE COMMISSION
                              Washington, DC 20549
                                        
                               -----------------



                                    FORM 8-K
                                        

                               -----------------
                                        
                                 CURRENT REPORT
                     PURSUANT TO SECTION 13 or 15(d) OF THE
                      SECURITIES AND EXCHANGE ACT of 1934
                                        

                     February 25, 1998 (February 18, 1997)
                Date of Report (Date of Earliest Event Reported)



                           PRENTISS PROPERTIES TRUST
             (Exact name of registrant as specified in its charter)


         Maryland                     1-14516               75-2661588
      ---------------                 -------               ----------
(State or other jurisdiction    (Commission File No.)     I.R.S. Employer
      of incorporation)                                (Identification No.)


                     3890 West Northwest Highway, Suite 400
                              Dallas, Texas 75220
                    (Address of principal executive offices)


                                 (214) 654-0886
              (Registrant's telephone number, including area code)


                                      N/A
         (former name or former address, if changed since last report)


================================================================================
<PAGE>
 
     Item 5. OTHER EVENTS

          On February 18, 1998, Prentiss Properties Trust (the "Company"), a
     national office and industrial real estate investment trust, agreed to sell
     1,198,157 of its common shares of beneficial interest (the "Common Shares")
     in a public offering underwritten by A.G. Edwards & Sons, Inc. (the
     "Underwriter"). Net proceeds to the Company from the sale were
     $30,826,505.89, after deducting costs payable by the Company of
     approximately $50,000.  The Underwriter informed the Company that it
     intends to sell the Common Shares to Nike Securities L.P., which in turn
     intends to deposit such shares, together with shares of common stock of
     other entities also acquired from the Underwriter, into a newly-formed unit
     investment trust registered under the Investment Act of 1940.  The
     transaction closed on February 23, 1998.


     Item 7.  FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND
       EXHIBITS.

              (c) EXHIBITS.

     The following exhibits are filed herewith:

         Exhibit           Description
         -------           -----------

     1                 Form of Underwriting Agreement, dated February 18, 1998,
                       between Prentiss Properties Trust, Prentiss Properties
                       Acquisition Partners, L.P., Prentiss Properties I, Inc.
                       and A.G. Edwards & Sons, Inc.

     8                 Form of Tax Opinion of Hunton & Williams, Richmond,
                       Virginia addressed to A.G. Edwards & Sons, Inc.

                                       2
<PAGE>
 
                                   SIGNATURE
                                        
     Pursuant to the requirements of the Securities Exchange Act of 1934, the
     Registrant has duly caused this report to be signed on its behalf by the
     undersigned hereunto duly authorized.



 
                                        PRENTISS PROPERTIES TRUST


 
     Date: February 25, 1998

                                        By: /s/ Gregory S. Imhoff
                                            -----------------------------

                                            Gregory S. Imhoff
                                            -----------------------------
 
                                            Vice President and Secretary
                                            -----------------------------


                                       3

<PAGE>
 
                                                                       Exhibit 1
                                                                       ---------

                                   1,198,157
                                        

                           Prentiss Properties Trust

                      Common Shares of Beneficial Interest
                                        
                             Underwriting Agreement
                                        
                                                            February 18, 1998


A.G. Edwards & Sons, Inc.
One North Jefferson Avenue
St. Louis, Missouri 63103

Dear Sirs:

     Prentiss Properties Trust, a Maryland real estate investment trust (the
"Company"), Prentiss Properties Acquisition Partners, L.P., a Delaware limited
partnership (the "Operating Partnership") and Prentiss Properties I, Inc., a
Delaware corporation (the "General Partner," and together with the Company and
the Operating Partnership, the "Transaction Entities") each wish to confirm as
follows its agreement with A.G. Edwards & Sons, Inc. (the "Underwriter"), with
respect to the sale by the Company and the purchase by the Underwriter of an
aggregate of 1,198,157 shares (the "Shares") of the Company's common shares of
beneficial interest, par value $.0l per share (the "Common Shares").  The
Underwriter intends to sell the Shares to Nike Securities L.P. which intends to
deposit the Shares with the trustee of a registered unit investment trust under
the Investment Company Act of 1940, as amended, (the "Trust") in exchange for
units in the Trust.

     Capitalized terms used but not otherwise defined herein shall have the
meanings given to those terms in the Prospectus (as herein defined).

       1.  Representations, Warranties and Agreements of the Transaction
Entities.  Each of the Transaction Entities, jointly and severally, represents,
warrants and agrees that, as of the date hereof:

           (a) A registration statement on Form S-3 (No. 333-38079), and any
<PAGE>
 
     amendments thereto, with respect to the Shares has (i) been prepared by the
     Company in conformity with the requirements of the United States Securities
     Act of 1933, as amended (the "Securities Act") and the rules and
     regulations (the "Rules and Regulations") of the United States Securities
     and Exchange Commission (the "Commission") thereunder, (ii) been filed with
     the Commission under the Securities Act and (iii) become effective under
     the Securities Act.  Copies of such registration statement and any
     amendments thereto have been delivered by the Company to the Underwriter.
     As used in this Agreement, "Effective Time" means the date and the time as
     of which such registration statement, or the most recent post-effective
     amendment thereto, if any, was declared effective by the Commission;
     "Effective Date" means the date of the Effective Time; "Preliminary
     Prospectus" means each prospectus included in such registration statement,
     or amendments thereto, before it became effective under the Securities Act
     and any prospectus filed with the Commission by the Company with the
     consent of the Underwriter pursuant to Rule 424(a) of the Rules and
     Regulations; "Registration Statement" means such registration statement, as
     amended at the Effective Time, including all information contained in the
     final prospectus filed with the Commission pursuant to Rule 424(b) of the
     Rules and Regulations and deemed to be a part of the registration statement
     as of the Effective Time pursuant to paragraph (b) of Rule 430A of the
     Rules and Regulations; and "Prospectus" means such final prospectus, as
     first filed with the Commission pursuant to paragraph (1) or (4) of Rule
     424(b) of the Rules and Regulations.  Any registration statement (including
     any amendment or supplement thereto or information which is deemed to be a
     part thereof) filed by the Company to register additional Common Shares
     under Rule 462(b) of the Rules and Regulations (a "Rule 462(b) Registration
     Statement") shall be deemed a part of the Registration Statement.  Any
     prospectus (including any amendment or supplement thereto or information
     which is deemed to be a part thereof) included in a Rule 462(b)
     Registration Statement shall be deemed to be part of the Prospectus.  Any
     reference herein to the Registration Statement, the Prospectus or a
     Preliminary Prospectus shall be deemed to include the documents
     incorporated or deemed to be incorporated by reference therein which were
     filed under the Securities and Exchange Act of 1934, as amended (the
     "Exchange Act"). For purposes of this Agreement, all references to the
     Registration Statement, any Preliminary Prospectus or the Prospectus or any
     amendment or supplement to any of the foregoing shall be deemed to include
     the copy filed with the Commission pursuant to its Electronic Data
     Gathering, Analysis and Retrieval system ("EDGAR").

            (b) Each Preliminary Prospectus included as part of the Registration
     Statement as originally filed or as part of any amendment or supplement
     thereto, or filed pursuant to Rule 424 under the Rules and Regulations,
     complied when so filed in all material respects with the provisions of the
     Securities Act, and each Preliminary Prospectus delivered to the
     Underwriter for use in connection with this offering was identical to the
     electronically transmitted copies thereof filed with the Commission
<PAGE>
 
     pursuant to EDGAR, except to the extent permitted by Regulation S-T.

            (c) The Registration Statement conforms in all material respects,
     and the Prospectus and any further amendments or supplements to the
     Registration Statement or the Prospectus will, when they become effective
     or are filed with the Commission, as the case may be, conform in all
     material respects to the requirements of the Securities Act and the Rules
     and Regulations, and do not and will not, as of the applicable Effective
     Date (as to the Registration Statement and any amendment thereto) and as of
     the applicable filing date and at the First Delivery Date (as defined
     below) (as to the Prospectus and any amendment or supplement thereto)
     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 (with respect to the Prospectus, in light of the
     circumstances under which they were made); provided that no representation
     or warranty is made as to information contained in or omitted from the
     Registration Statement or the Prospectus in reliance upon and in conformity
     with written information furnished to the Company by or on behalf of the
     Underwriter specifically for inclusion therein.  The Prospectus delivered
     to the Underwriter for use 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.

            (d) The documents incorporated or deemed to be incorporated by
     reference in the Registration Statement as of the applicable Effective
     Date, the Prospectus as of its date or any Preliminary Prospectus as of its
     date, complied in all material respects with the Exchange Act and the rules
     and regulations thereunder, and none of such documents, at such dates,
     contained an untrue statement of a material fact or omitted 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.

            (e) 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 any 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 any
     Preliminary Prospectus or the Prospectus has been issued and no proceeding
     for that purpose has been instituted or, to the knowledge of any of the
     Transaction Entities, after due inquiry of the Commission, threatened by
     the Commission or by the state securities authority of any jurisdiction.

            (f) The Company has been duly formed and is validly existing as a
     real estate investment trust in good standing under the laws of the State
     of Maryland, is duly qualified to do business and is in good standing in
     each jurisdiction in which its ownership or lease of property or the
     conduct of its business requires such qualification, 
<PAGE>
 
     and has all power and authority necessary to own or hold its properties, to
     conduct the business in which it is engaged and to enter into and perform
     its obligations under this Agreement. None of the subsidiaries of the
     Company (other than the Operating Partnership, the General Partner, and
     Prentiss Properties Real Estate Fund I, L.P., a Delaware limited
     partnership ("PPREF") (collectively, the "Significant Subsidiaries")) is a
     "significant subsidiary," as such term is defined in Rule 405 of the Rules
     and Regulations. Except as described in the Prospectus and other than the
     Transaction Entities (other than the Company), the Company owns no direct
     or indirect equity interest in any entity, except for such interests as, in
     the aggregate, are not material to the condition, financial or otherwise,
     or the earnings, assets or business affairs of the Company and its
     subsidiaries considered as a single enterprise.

            (g) The Company has an authorized capitalization as set forth in the
     Prospectus, and all of the issued shares of beneficial interest of the
     Company have been duly and validly authorized and issued, are fully paid
     and non-assessable and conform to the description thereof contained in the
     Prospectus.  Except as disclosed in the Prospectus, no shares of beneficial
     interest of the Company are reserved for any purpose and except as
     disclosed in the Prospectus and except for the equity interests in the
     Operating Partnership ("Units"), there are no outstanding securities
     convertible into or exchangeable for any shares of beneficial interest of
     the Company, and no outstanding options, rights (preemptive or otherwise)
     or warrants to purchase or subscribe for shares of beneficial interest or
     any other securities of the Company.

            (h) The Operating Partnership has been duly formed and is validly
     existing as a limited partnership under the laws of the State of Delaware,
     is duly qualified to do business 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 be so
     qualified would not have a material adverse effect on the earnings, assets
     or business affairs of the Company and its subsidiaries considered as a
     single enterprise), and has all partnership power and authority necessary
     to own or hold its properties, to conduct the business in which it is
     engaged and to enter into and perform its obligations under this Agreement.
     The General Partner is the sole general partner of the Operating
     Partnership.  The Agreement of Limited Partnership of the Operating
     Partnership (the "Operating Partnership Agreement") is in full force and
     effect, and the aggregate percentage interests of the Company, the General
     Partner and the limited partners in the Operating Partnership are as set
     forth in the Prospectus.

            (i) The General Partner has been duly formed and is validly existing
     as a corporation in good standing under the laws of the State of Delaware,
     is duly qualified to do business and is in good standing in each
     jurisdiction in which its ownership or lease of property or the conduct of
     its business requires such qualification (except where the 
<PAGE>
 
     failure to be so qualified would not have a material adverse effect on the
     earnings, assets or business affairs of the Company and its subsidiaries
     considered as a single enterprise), and has all corporate power and
     authority necessary to own or hold its properties, to conduct the business
     in which it is engaged and to enter into and perform its obligations under
     this Agreement. All of the issued and outstanding capital stock of the
     General Partner has been duly authorized and validly issued and is fully
     paid and non-assessable, is owned by the Company free and clear of any
     security interest, mortgage, pledge, lien, encumbrance, claim, restriction
     or equities and has been offered and sold in compliance with all applicable
     laws (including, without limitation, federal or state securities laws). No
     shares of capital stock of the General Partner are reserved for any
     purpose, and there are no outstanding securities convertible into or
     exchangeable for any capital stock of the General Partner, and no
     outstanding options, rights (preemptive or otherwise) or warrants to
     purchase or to subscribe for shares of such capital stock or any other
     securities of the General Partner.

            (j) PPREF has been duly organized and is validly existing as a
     limited partnership under the laws of the State of Delaware, is duly
     qualified to do business 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 be so
     qualified would not have a material adverse effect on the earnings, assets
     or business affairs of the Company and its subsidiaries considered as a
     single enterprise), and has all partnership power and authority necessary
     to own or hold its properties and to conduct the business in which it is
     engaged.  Except as set forth in the Prospectus, all of the partnership
     interests of PPREF are owned directly or indirectly by the Company and the
     Operating Partnership, free and clear of any security interest, mortgage,
     pledge, lien, encumbrance, claim, restriction or equities.

            (k) The Shares have been duly and validly authorized and, when
     issued and delivered against payment therefor as provided herein, will be
     duly and validly issued, fully paid and non-assessable.  Upon payment of
     the purchase price and delivery of the Shares in accordance herewith, the
     Underwriter will receive good, valid and marketable title to the Shares,
     free and clear of all security interests, mortgages, pledges, liens,
     encumbrances, claims, restrictions and equities.  The terms of the Shares
     conform in substance to all statements and descriptions related thereto
     contained in the Prospectus.  The form of the certificates to be used to
     evidence the Shares will at the First Delivery Date be in due and proper
     form and will comply with all applicable legal requirements.  The issuance
     of the Shares is not subject to any preemptive or other similar rights.

            (1) (A) This Agreement has been duly and validly authorized,
     executed and delivered by each of the Transaction Entities; and (B) the
     Operating Partnership Agreement and the partnership agreement of each
     Significant Subsidiary (where 
<PAGE>
 
     applicable), has been duly and validly authorized, executed and delivered
     by the parties thereto and is a valid and binding agreement of the parties
     thereto, enforceable against such parties in accordance with its terms.

            (m) The execution, delivery and performance of this Agreement by
     each of the Transaction Entities and the consummation of the transactions
     contemplated hereby will not conflict with or result in a breach or
     violation of any of the terms or provisions of, or constitute a default
     under, any indenture, mortgage, deed of trust, loan agreement or other
     agreement or instrument to which any of the Transaction Entities is a party
     or by which any of the Transaction Entities is bound or to which any of the
     Properties or other assets of any of the Transaction Entities is subject,
     nor will such actions result in any violation of the provisions of the
     charter, by-laws, certificate of limited partnership or agreement of
     limited partnership of any of the Transaction Entities, or any statute or
     any order, Rule or regulation of any court or governmental agency or body
     having jurisdiction over any of the Transaction Entities or any of their
     properties or assets; and except for the registration of the Shares under
     the Securities Act and such consents, approvals, authorizations,
     registrations or qualifications as may be required under the Exchange Act
     and applicable state securities laws in connection with the purchase and
     distribution of the Shares by the Underwriter, no consent, approval,
     authorization or order of, or filing or registration with, any such court
     or governmental agency or body is required for the execution, delivery and
     performance of this Agreement by the Transaction Entities and the
     consummation of the transactions contemplated hereby.

            (n) Other than as described in the Prospectus, there are no
     contracts, agreements or understandings between the Company and any person
     granting such person the right to require the Company to file a
     registration statement under the Securities Act with respect to any
     securities of the Company owned or to be owned by such person or to require
     the Company 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
     Company under the Securities Act.

            (o) Except as described in the Prospectus and except for the
     issuance of securities under employee benefit plans, the issuance of Units
     in connection with the acquisition of any properties and the issuance of
     Common Shares upon the exchange of Units pursuant to the Operating
     Partnership Agreement, no Transaction Entity has sold or issued any
     securities during the six-month period preceding the date of the
     Prospectus, including any sales pursuant to Rule 144A under, or Regulations
     D or S of, the Securities Act.

            (p) None of the Transaction Entities nor any of the Properties has
     sustained, since the date of the latest audited financial statements
     included in the Prospectus, any 
<PAGE>
 
     material loss or interference with its business from fire, explosion, flood
     or other calamity, whether or not covered by insurance, or from any labor
     dispute or court or governmental action, order or decree, other than as set
     forth or contemplated in the Prospectus; and, since such date, there has
     not been any change in the capital stock or long-term debt of any of the
     Transaction Entities or any material adverse change in or affecting any of
     the Properties or the general affairs, management, financial position,
     shareholders' equity or results of operations of any of the Transaction
     Entities, other than as set forth or contemplated in the Prospectus.

            (q) The financial statements (including the related notes and
     supporting schedules) filed as part of, or incorporated by reference in,
     the Registration Statement and the Prospectus present fairly the financial
     condition and results of operations of the entities purported to be shown
     thereby, at the dates and for the periods indicated, and have been prepared
     in conformity with generally accepted accounting principles applied on a
     consistent basis throughout the periods involved.  The Company's ratio of
     earnings to fixed charges (actual and, if any, pro forma) included in the
     Prospectus under the captions "Ratio of Earnings to Fixed Charges" and in
     Exhibit 12.1 to the Registration Statement have been calculated in
     compliance with Item 503(d) of Regulation S-K of the Commission. Pro forma
     financial information included in or incorporated by reference in the
     Registration Statement and the Prospectus has been prepared in accordance
     with the applicable requirements of the Securities Act, the Rules and
     Regulations and AICPA guidelines with respect to pro forma financial
     information and includes all adjustments necessary to present fairly the
     pro forma financial position of the Company at the respective dates
     indicated and the results of operations for the respective periods
     specified.

            (r) Coopers & Lybrand L.L.P., who have certified certain financial
     statements of the Company, whose reports appear in the Prospectus and who
     have delivered the initial letter referred to in Section 7(f) hereof, are
     independent public accountants as required by the Securities Act and the
     Rules and Regulations.

            (s) (A) The Operating Partnership, directly or indirectly, has good
     and marketable title to each of the Properties and the other assets not
     located in Texas, and has good and indefeasible title to each of the
     Properties and the other assets located in Texas, in each case free and
     clear of all liens, encumbrances, claims, security interests and defects,
     other than those referred to in the Prospectus or those which are not
     material in amount or those which would not have a material adverse effect
     on the business, operations, use or value of any of the Properties; (B) all
     liens, charges, encumbrances, claims or restrictions on or affecting any of
     the Properties and the assets of any Transaction Entity which are required
     to be disclosed in the Prospectus are disclosed therein; (C) except as
     otherwise described in the Prospectus, neither any Significant 
<PAGE>
 
     Subsidiary nor any 10% or greater (in terms of square footage or base rent)
     tenant of any of the Properties is in default under (i) any space leases
     (as lessor or lessee, as the case may be) relating to the Properties, or
     (ii) any of the mortgages or other security documents or other agreements
     encumbering or otherwise recorded against the Properties, in each case
     which default would have a material adverse effect on the earnings, assets
     or business affairs of the Company and its subsidiaries considered as a
     single enterprise, and no Transaction Entity knows of any event which, but
     for the passage of time or the giving of notice, or both, would constitute
     a default under any of such documents or agreements; (D) no tenant under
     any of the leases at the Properties has a right of first refusal to
     purchase the premises demised under such lease except those rights which if
     exercised would not have a material adverse effect on the earnings, assets
     or business affairs of the Company and its subsidiaries considered as a
     single enterprise; (E) each of the Properties complies with all applicable
     codes, laws and regulations (including, without limitation, building and
     zoning codes, laws and regulations and laws relating to access to the
     Properties), except for such failures to comply that would not have a
     material adverse effect on the earnings, assets or business affairs of the
     Company and its subsidiaries considered as a single enterprise; and (F) no
     Transaction Entity has knowledge of any pending or threatened condemnation
     proceedings, zoning change or other proceeding or action that will have a
     material adverse effect on the earnings, assets or business affairs of the
     Company and its subsidiaries, considered as a single enterprise, if such
     proceeding, change or action were not resolved in favor of the Company.

            (t) The mortgages and deeds of trust which encumber the Properties
     are not convertible into equity securities of the entity owning such
     Property and said mortgages and deeds of trust are not cross-defaulted or
     cross-collateralized with any property other than other Properties.

            (u) The Operating Partnership, directly or indirectly, has obtained
     title insurance on the fee or leasehold interests in each of the
     Properties, in an amount at least equal to the greater of (A) the mortgage
     indebtedness of each such Property or (B) the purchase price of each such
     Property.

            (v) Except as disclosed in the Prospectus: (A) to the knowledge of
     the Transaction Entities, the operations of the Company, the Operating
     Partnership, the General Partner, each Manager, and the Properties are
     materially in compliance with all Environmental Laws (as defined below) and
     all requirements of applicable permits, licenses, approvals and other
     authorizations issued pursuant to Environmental Laws; (B) to the knowledge
     of the Transaction Entities, none of the Transaction Entities or any
     Property has caused or suffered to occur any Release (as defined below) of
     any Hazardous Substance (as defined below) into the Environment (as defined
     below) on, in, under or from any Property, and no condition exists on, in,
     under or adjacent to any Property that 
<PAGE>
 
     could result in the incurrence of liabilities under, or any violations of,
     any Environmental Law or give rise to the imposition of any Lien (as
     defined below), under any Environmental Law, except such as in each case
     would not have a material adverse effect on any Property or Transaction
     Entity; (C) none of the Transaction Entities has received any written
     notice of a claim under or pursuant to any Environmental Law or under
     common law pertaining to Hazardous Substances on, in, under or originating
     from any Property; (D) none of the Transaction Entities has actual
     knowledge of, or received any written notice from any Governmental
     Authority (as defined below) claiming, any violation of any Environmental
     Law or a determination to undertake and/or request the investigation,
     remediation, clean-up or removal of any Hazardous Substance released into
     the Environment on, in, under or from any Property; and (E) no Property is
     included or, to the knowledge of the Transaction Entities, after due
     inquiry, proposed for inclusion on the National Priorities List issued
     pursuant to CERCLA (as defined below) by the United States Environmental
     Protection Agency (the "EPA") or on the Comprehensive Environmental
     Response, Compensation, and Liability Information System database
     maintained by the EPA, and none of the Transaction Entities has actual
     knowledge that any Property has otherwise been identified in a published
     writing by the EPA as a potential CERCLA removal, remedial or response site
     or, to the knowledge of the Transaction Entities, is included on any
     similar list of potentially contaminated sites pursuant to any other
     Environmental Law.

     As used herein, "Hazardous Substance" shall include any hazardous
substance, hazardous waste, toxic substance, pollutant or hazardous material,
including, without limitation, oil, petroleum or any petroleum-derived substance
or waste, asbestos or asbestos-containing materials, PCBs, pesticides,
explosives, radioactive materials, dioxins, urea formaldehyde insulation or any
constituent of any such substance, pollutant or waste which is subject to
regulation under any Environmental Law (including, without limitation, materials
listed in the United States Department of Transportation Optional Hazardous
Material Table, 49 C.F.R. (S) 172.101, or in the EPA's List of Hazardous
Substances and Reportable Quantities, 40 C.F.R. Part 302); "Environment" shall
mean any surface water, drinking water, ground water, land surface, subsurface
strata, river sediment, buildings, structures, and ambient, workplace and indoor
and outdoor air; "Environmental Law" shall mean the Comprehensive Environmental
Response, Compensation and Liability Act of 1980, as amended (42 U.S.C. (S) 9601
et seq.) ("CERCLA"), the Resource Conservation and Recovery Act of 1976, as
amended (42 U.S.C. (S) 6901, et seq.), the Clean Air Act, as amended (42 U.S.C.
(S) 7401, et seq.), the Clean Water Act, as amended (33 U.S.C. (S) 1251, et
seq.), the Toxic Substances Control Act, as amended (15 U.S.C. (S) 2601, et
seq.), the Occupational Safety and Health Act of 1970, as amended (29 U.S.C. (S)
651, et seq.), the Hazardous Materials Transportation Act, as amended (49 U.S.C.
(S) 1801, et seq.), and all other federal, state and local laws, ordinances,
regulations, rules and orders relating to the protection of the Environment or
of human health from environmental effects; "Governmental Authority" shall mean
any federal, state or local governmental office, agency or authority having the
duty or 
<PAGE>
 
authority to promulgate, implement or enforce any Environmental Law;
"Lien" shall mean, with respect to any Property, any mortgage, deed of trust,
pledge, security interest, lien, encumbrance, penalty, fine, charge, assessment,
judgment or other liability in, on or affecting such Property; and "Release"
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.

            (w) Each Transaction Entity and their subsidiaries, and each
     Property carries, or is covered by, insurance in such amounts and covering
     such risks as is adequate for the conduct of its business and the value of
     such Property and as is customary for companies engaged in similar
     businesses in similar industries.

            (x) Each Transaction Entity owns or possesses adequate rights to use
     all material patents, patent applications, trademarks, service marks, trade
     names, trademark registrations, service mark registrations, copyrights and
     licenses necessary for the conduct of its business and has no reason to
     believe that the conduct of its business will conflict with, and has not
     received any notice of any claim of conflict with, any such rights of
     others.

            (y) Except as described in the Prospectus, there are no legal or
     governmental proceedings pending to which any Transaction Entity is a party
     or of which any property or assets of any Transaction Entity is the subject
     which, if determined adversely to such Transaction Entity, could reasonably
     be expected to have a material adverse effect on the consolidated financial
     position, shareholders' equity, results of operations or business of the
     Company; and to the best knowledge of the Transaction Entities, no such
     proceedings are threatened or contemplated by governmental authorities or
     threatened by others.

            (z) There are no contracts or other documents which are required to
     be described in the Prospectus or filed as exhibits to the Registration
     Statement by the Securities Act or by the Rules and Regulations which have
     not been described in the Prospectus or filed as exhibits to the
     Registration Statement or incorporated therein by reference as permitted by
     the Rules and Regulations.

            (aa) No relationship, direct or indirect, exists between or among
     any of the Transaction Entities on the one hand, and the directors,
     trustees, officers, shareholders, customers or suppliers of the Transaction
     Entities on the other hand, which is required to be described in the
     Prospectus which is not so described.

            (ab) No labor disturbance by the employees of any Transaction Entity
<PAGE>
 
     exists or, to the knowledge of the Transaction Entities, is imminent which
     might be expected to have a material adverse effect on the consolidated
     financial position, shareholders' equity, results of operations or business
     of the Company and its subsidiaries considered as a single enterprise.

            (ac) 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) 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
     Internal Revenue Code of 1986, as amended (the "Code"); 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 is so qualified
     in all material respects and nothing has occurred, whether by action or by
     failure to act, which would cause the loss of such qualification.

            (ad) Each Transaction Entity has filed all federal, state and local
     income and franchise tax returns required to be filed through the date
     hereof and has paid all taxes due thereon, and no tax deficiency has been
     determined adversely to any Transaction Entity which has had (nor does any
     Transaction Entity have any knowledge of any tax deficiency which, if
     determined adversely to it might have) a material adverse effect on the
     financial position, shareholders' equity, results of operations or business
     of such Transaction Entity.

            (ae) At all times since October 22, 1996, the Company, the Operating
     Partnership, the General Partner, and the Managers have been and upon the
     sale of the Shares will continue to be, organized and operated in
     conformity with the requirements for qualification of the Company as a real
     estate investment trust under the Code and the proposed method of operation
     of the Company, the Operating Partnership, the General Partner and the
     Managers will enable the Company to continue to meet the requirements for
     qualification and taxation as a real estate investment trust under the
     Code.

            (af) Since the date as of which information is given in the
     Prospectus through the date hereof, and except as may otherwise be
     disclosed in the Prospectus, no Transaction Entity has (i) issued or
     granted any securities, except for the issuance of securities under
     employee benefit plans and the issuance of Common Shares upon the exchange
     of Units pursuant to the Operating Partnership Agreement, (ii) incurred any
     liability or obligation, direct or contingent, other than liabilities and
     obligations which were incurred in the ordinary course of business, (iii)
     entered into any transaction not in 
<PAGE>
 
     the ordinary course of business or (iv) declared or paid any dividend on
     its capital stock (other than regular quarterly dividends).

            (ag) Each Transaction Entity and their subsidiaries (i) makes and
     keeps accurate books and records and (ii) maintains internal accounting
     controls which provide reasonable assurance that (A) transactions are
     executed in accordance with management's authorization, (B) transactions
     are recorded as necessary to permit preparation of its financial statements
     and to maintain accountability for its assets, (C) access to its assets is
     permitted only in accordance with management's authorization and (D) the
     reported accountability for its assets is compared with existing assets at
     reasonable intervals.

            (ah) Neither the Company nor any Significant Subsidiary (i) is in
     violation of its charter, by-laws, certificate of limited partnership,
     agreement of limited partnership or other similar organizational document,
     (ii) is in default in any material respect, and no event has occurred
     which, 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 material indenture, mortgage, deed of trust,
     loan agreement or other agreement or instrument to which it is a party or
     by which it is bound or to which any of the Properties or any of its other
     properties or assets is subject or (iii) is in violation in any material
     respect 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 or has failed to obtain any material license, permit,
     certificate, franchise or other governmental authorization or permit
     necessary to the ownership of the Properties or any of its other properties
     or assets or to the conduct of its business.

            (ai) No Transaction Entity, nor any director, trustee, officer,
     agent, employee or other person associated with or acting on behalf of any
     Transaction Entity, has used any corporate funds for any unlawful
     contribution, gift, entertainment or other unlawful expense relating to
     political activity; made any direct or indirect unlawful payment to any
     foreign or domestic government official or employee from corporate funds;
     violated or is in violation of any provision of the Foreign Corrupt
     Practices Act of 1977; or made any bribe, rebate, payoff, influence
     payment, kickback or other unlawful payment.

            (aj) No Transaction Entity is an "investment company" within the
     meaning of such term under the Investment Company Act of 1940 and the rules
     and regulations of the Commission thereunder.

            (ak) The Shares have been approved for listing upon official notice
     of issuance on the New York Stock Exchange.

            (al) Other than this Agreement and as set forth in the Prospectus
     under the 
<PAGE>
 
     heading "Underwriting," there are no contracts, agreements or
     understandings between any Transaction Entity and any person that would
     give rise to a valid claim against any Transaction Entity or the
     Underwriter for a brokerage commission, finder's fee or other like payment
     with respect to the consummation of the transactions contemplated by this
     Agreement.

            (am) Each Transaction Entity has complied with all provisions of
     Florida Statutes (S) 517.075, relating to issuers doing business with Cuba.


          2.  Purchase of the Shares by the Underwriter.  On the basis of the
representations and warranties contained in, and subject to the terms and
conditions of, this Agreement, the Company agrees to sell the 1,198,157 Shares
to the Underwriter and the Underwriter agrees to purchase 1,198,157 Shares at a
purchase price of $25.770 per share.

     The Company shall not be obligated to deliver any of the Shares to be
delivered on the Delivery Date (as hereinafter defined), as the case may be,
except upon payment for all the Shares to be purchased on the Delivery Date as
provided herein.


       3.  Offering of Shares by the Underwriter.  The Company is advised by you
that the Underwriter intends to sell the Shares to Nike Securities L.P., which
intends to deposit such shares, together with shares of common stock of other
entities also acquired from the Underwriter, into the Trust, newly-formed unit
investment trust (the "Offering") as soon after the execution and delivery
hereof as in your judgment is advisable (and, if necessary, any post-effective
amendment to the Registration Statement).

       4.  Delivery of and Payment for the Shares.  Delivery to the Underwriter
of and payment for the Shares shall be made subject to Section 7, at the office
of Chapman and Cutler, 111 West Monroe Street, Chicago, Illinois 60603, at 10:00
A.M., Chicago time, on the third full business day following the date of this
Agreement or on the fourth full business day if this Agreement is executed after
the daily closing time of the New York Stock Exchange, or at such other date or
place as shall be determined by agreement between the Underwriter and the
Company.  This date and time are sometimes referred to as the "Delivery Date."
On the Delivery Date, the Company shall deliver or cause to be delivered
certificates representing the Shares to the Underwriter for the account of the
Underwriter against payment to or upon the order of the Company of the purchase
price by wire transfer or, at the Company's election, by certified or official
bank check or checks payable in same day funds.  Time shall be of the essence,
and delivery at the time and place specified pursuant to this Agreement is a
further condition of the obligation of the Underwriter hereunder.  Upon
delivery, the Shares shall be registered in such names and in such denominations
as the Underwriter shall request in writing not less than two full business days
prior to the Delivery Date.  For the purpose of expediting the checking and
packaging of the certificates for the Shares, the Company shall make the
<PAGE>
 
certificates representing the Shares available for inspection by the Underwriter
in New York, New York, not later than 2:00 P.M., New York City time, on the
business day prior to the Delivery Date.

       5.  Further Agreements of the Transaction Entities.  Each of the
Transaction Entities jointly and severally agrees:


            (a) To prepare the Prospectus in a form approved by the Underwriter
     and to file such Prospectus pursuant to Rule 424(b) under the Securities
     Act not later than the Commission's close of business on the second
     business day following the execution and delivery of this Agreement or, if
     applicable, such earlier time as may be required by Rule 430A(a)(3) under
     the Securities Act; to make no further amendment or any supplement to the
     Registration Statement or to the Prospectus except as permitted herein; to
     advise the Underwriter, promptly after it receives notice thereof, of the
     time when any amendment to the Registration Statement has been filed or
     becomes effective or any supplement to the Prospectus or any amended
     Prospectus has been filed and to furnish the Underwriter with copies
     thereof; to advise the Underwriter, promptly after it receives notice
     thereof, of the issuance by the Commission of any stop order or of any
     order preventing or suspending the use of any Preliminary Prospectus or the
     Prospectus, of the suspension of the qualification of the Shares for
     offering or sale in any jurisdiction, of the initiation or threatening of
     any proceeding for any such purpose, or of any request by the Commission
     for the amending or supplementing of the Registration Statement or the
     Prospectus or for additional information; and, in the event of the issuance
     of any stop order or of any order preventing or suspending the use of any
     Preliminary Prospectus or the Prospectus or suspending any such
     qualification, to use promptly its best efforts to obtain its withdrawal;

            (b) To furnish promptly to the Underwriter and to counsel for the
     Underwriter such number of conformed copies as the Underwriter shall
     reasonably request of the Registration Statement as originally filed with
     the Commission, and each amendment thereto filed with the Commission,
     including all consents and exhibits filed therewith or incorporated by
     reference therein and all documents incorporated by reference therein; such
     copies will be identical to the electronically transmitted copies thereof
     filed with the Commission pursuant to EDGAR, except to the extent permitted
     by Regulation S-T;

            (c) To deliver promptly to the Underwriter such number of the
     following documents as the Underwriter shall reasonably request:  each
     Preliminary Prospectus, the Prospectus and any amended or supplemented
     Prospectus; and, if the delivery of a prospectus is required at any time
     after the Effective Time in connection with the offering or sale of the
     Shares or any other securities relating thereto and if at such time any
     events shall have occurred as a result of which the Prospectus as then
     amended or supplemented 
<PAGE>
 
     would include an 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 when such Prospectus
     is delivered, not misleading, or, if for any other reason it shall be
     necessary to amend or supplement the Prospectus in order to comply with the
     Securities Act or the Exchange Act, to notify the Underwriter and, upon its
     request, to file such document and to prepare and furnish without charge to
     the Underwriter and to any dealer in securities as many copies as the
     Underwriter may from time to time reasonably request of an amended or
     supplemented Prospectus which will correct such statement or omission or
     effect such compliance. The aforementioned documents furnished to the
     Underwriter will be identical to the electronically transmitted copies
     thereof filed with the Commission pursuant to EDGAR, except to the extent
     permitted by Regulation S-T;

            (d) To file promptly with the Commission any amendment to the
     Registration Statement or the Prospectus or any supplement to the
     Prospectus that may, in the judgment of the Company or the Underwriter, be
     required by the Securities Act or requested by the Commission;

            (e) Prior to filing with the Commission any amendment to the
     Registration Statement or supplement to the Prospectus or any Prospectus
     pursuant to Rule 424 of the Rules and Regulations, to furnish a copy
     thereof to the Underwriter and counsel for the Underwriter and obtain the
     consent of the Underwriter to the filing;

            (f) The Company will make generally available to its security
     holders and will deliver to the Underwriter as soon as practicable (it
     being understood that the Company shall have until at least 45 days after
     the end of the Company's current fiscal quarter) an earnings statement (in
     form complying with the provisions of Section 11(a) of the Securities Act
     and Rule 158 of the Rules and Regulations), which need not be certified by
     independent certified public accountants unless required by the Securities
     Act or the Rules and Regulations, covering a twelve-month period commencing
     after the "effective date" (as defined in said Rule 158) of the
     Registration Statement;

            (g) For a period of five years following the Effective Date, to
     furnish to the Underwriter copies of all materials furnished by the Company
     to its shareholders and all public reports and all reports and financial
     statements furnished by the Company to the principal national securities
     exchange upon which the Common Shares may be listed pursuant to
     requirements of or agreements with such exchange or to the Commission
     pursuant to the Exchange Act or any rule or regulation of the Commission
     thereunder;

            (h) Promptly from time to time to take such action as the
     Underwriter may reasonably request to qualify the Shares for offering and
     sale under the securities, real 
<PAGE>
 
     estate syndication or Blue Sky laws of such jurisdictions as the
     Underwriter may request and to comply with such laws so as to permit the
     continuance of sales and dealings therein in such jurisdictions for as long
     as may be necessary to complete the distribution of the Shares;

            (i) To maintain the listing of the Common Shares on the New York
     Stock Exchange, Inc.;

            (j) To apply the net proceeds from the sale of the Shares being sold
     by the Company in accordance with the description set forth in the
     Prospectus under the caption "Use of Proceeds";

            (k) To take such steps as shall be necessary to ensure that none of
     the Transaction Entities shall become an "investment company" within the
     meaning of such term under the Investment Company Act of 1940 and the rules
     and regulations of the Commission thereunder;

            (1) Except as stated in this Agreement and in the Preliminary
     Prospectus and Prospectus, no Transaction Entity has taken, nor will take,
     directly or indirectly, any action designed to or that might reasonably be
     expected to cause or result in stabilization or manipulation of the price
     of the Common Shares to facilitate the sale or resale of the Shares;

            (m) The Company will use its best efforts to continue to meet the
     requirements to qualify as a "real estate investment trust" under the Code;
     and

            (n) If this Agreement shall be terminated by the Underwriter because
     of any failure or refusal on the part of the Transaction Entities to comply
     with the terms or fulfill any of the conditions of this Agreement, the
     Transaction Entities jointly and severally agree to reimburse the
     Underwriter for all reasonable out-of-pocket expenses (including fees and
     expenses of counsel for the Underwriter) incurred by the Underwriter in
     connection herewith.


       6.  Expenses.  The Transaction Entities jointly and severally agree to
pay (a) the costs incident to the authorization, issuance, sale and delivery of
the Shares and any taxes payable in that connection; (b) the costs incident to
the preparation, printing and filing under the Securities Act of the
Registration Statement and any amendments and exhibits thereto; (c) the costs of
distributing the Registration Statement as originally filed and each amendment
thereto and any post-effective amendments thereof (including, in each case,
exhibits), any Preliminary Prospectus, the Prospectus and any amendment or
supplement to the Prospectus, all as provided in this Agreement; (d) the costs
of producing and distributing this Agreement and any other 
<PAGE>
 
related documents in connection with the offering, purchase, sale and delivery
of the Shares; (e) the filing fees incident to securing any required review by
the National Association of Securities Dealers, Inc. of the terms of sale of the
Shares; (f) any applicable listing or other fees; (g) the fee and expenses of
qualifying the Shares under the securities laws of the several jurisdictions as
provided in Section 5(h) and of preparing, printing and distributing a Blue Sky
Memorandum (including related reasonable fees and expenses of counsel to the
Underwriter); and (h) all other costs and expenses incident to the performance
of the obligations of the Transaction Entities under this Agreement; provided
that, except as provided in this Section 6 and in Section 12 the Underwriter
shall pay its own costs and expenses, including the costs and expenses of its
counsel, any transfer taxes on the Shares which they may sell and the expenses
of advertising any offering of the Shares made by the Underwriter.

       7.  Conditions of Underwriter's Obligations.  The obligations of the
Underwriter hereunder are subject to the accuracy, when made and on the Delivery
Date, of the representations and warranties of the Transaction Entities
contained herein, to the performance by each Transaction Entity of its
obligations hereunder, and to each of the following additional terms and
conditions:

            (a) If, at the time this Agreement is executed and delivered, it is
     necessary for the Registration Statement or a post-effective amendment
     thereto to be declared effective before the offering of the Shares may
     commence, the Registration Statement or such post-effective amendment shall
     have become effective not later than 5:30 P.M., New York City time, on the
     date hereof, or at such later date and time as shall be consented to in
     writing by you, and all filings, if any, required by Rules 424 and 430A
     under the Rules and Regulations shall have been timely made; no stop order
     suspending the effectiveness of the Registration Statement shall have been
     issued and no proceeding for that purpose shall have been instituted or, to
     the knowledge of the Transaction Entities or the Underwriter, threatened by
     the Commission, and any request of the Commission for additional
     information (to be included in the Registration Statement or the Prospectus
     or otherwise) shall have been complied with to the satisfaction of the
     Underwriter.

            (b) Subsequent to the effective date of this Agreement, there shall
     not have occurred (i) any change, or any development involving a
     prospective change, in or affecting the condition, financial or otherwise,
     business, properties, net worth, or results of operations of any
     Transaction Entity, any of their subsidiaries or any Property not
     contemplated by the Prospectus, which in the opinion of the Underwriter,
     would materially adversely affect the market for the Shares, or (ii) any
     event or development relating to or involving any Transaction Entity, or
     any partner, officer, director or trustee of any Transaction Entity, which
     makes any statement of a material fact made in the Prospectus untrue or
     which, in the opinion of the Company and its counsel or the Underwriter and
     its counsel, requires the making of any addition to or change in the
<PAGE>
 
     Prospectus in order to state a material fact required by the Securities Act
     or any other law to be stated therein or necessary in order to make the
     statements therein not misleading, if amending or supplementing the
     Prospectus to reflect such event or development would, in your opinion,
     adversely affect the market for the Shares.

            (c) All corporate proceedings and other legal matters incident to
     the authorization, form and validity of this Agreement, the Shares, the
     Registration Statement and the Prospectus, and all other legal matters
     relating to this Agreement and the transactions contemplated hereby shall
     be reasonably satisfactory in all material respects to counsel for the
     Underwriter, and the Company shall have furnished to such counsel all
     documents and information that they may reasonably request to enable them
     to pass upon such matters.

            (d) Hunton & Williams, or such other firm or firms satisfactory to
     counsel for the Underwriter, shall have furnished to the Underwriter its
     written opinion, as counsel to the Company, addressed to the Underwriter
     and dated such Delivery Date, in form and substance reasonably satisfactory
     to the Underwriter, to the effect that:


                  (i)   The Company has been duly formed and is validly existing
          as a real estate investment trust in good standing under and by virtue
          of the laws of the State of Maryland, is in good standing with the
          State Department of Assessments and Taxation of Maryland and as a
          foreign trust or corporation in those jurisdictions listed in such
          opinion, and has all trust power and authority necessary to own or
          hold its properties and to conduct the business in which it is engaged
          as described in the Registration Statement and the Prospectus, and to
          enter into and perform its obligations under this Agreement.

                  (ii)  The Company has an authorized capitalization as set
          forth in the Prospectus under the caption "Capitalization," and all of
          the issued shares of beneficial interest of the Company (other than
          the Shares) have been duly and validly authorized and issued, are
          fully paid and non-assessable and conform in all material respects to
          the description thereof contained in the Prospectus.

                  (iii) The Operating Partnership has been duly formed and is
          validly existing as a limited partnership under the laws of the State
          of Delaware, is duly qualified to do business as a foreign limited
          partnership in Texas, Maryland, Illinois, Pennsylvania and California,
          and has all partnership power and authority necessary to own or hold
          its properties, to conduct the business in which it is engaged as
          described in the Registration Statement and the Prospectus, and to
          enter into and perform its obligations under this Agreement.  To such
          counsel's knowledge, the General Partner is the sole general partner
          of the Operating 
<PAGE>
 
          Partnership, the Operating Partnership Agreement is in full force and
          effect, and the aggregate percentage interests of the Company, the
          General Partner and the limited partners in the Operating Partnership
          are as set forth in the Prospectus.

                  (iv)  The General Partner has been duly formed and is validly
          existing as a corporation in good standing under the laws of the State
          of Delaware, is duly qualified to do business and is in good standing
          as a foreign corporation in Texas, Maryland, Illinois, Pennsylvania
          and California, and has all corporate power and authority necessary to
          own or hold its properties, to conduct the business in which it is
          engaged as described in the Registration Statement and the Prospectus,
          and to enter into and perform its obligations under this Agreement.
          All of the issued and outstanding capital stock of the General Partner
          has been duly authorized and validly issued and is fully paid and non-
          assessable, is owned by the Company free and clear of any perfected
          security interest, mortgage, pledge, lien, encumbrance, claim,
          restriction or equities or, to such counsel's knowledge, any
          unperfected security interest, mortgage, pledge, lien, encumbrance,
          claim, restriction or equities.

                  (v)   PPREF has been duly organized and is validly existing as
          a partnership under the laws of the State of Delaware, is duly
          qualified to do business in California, Illinois, Michigan, Missouri,
          Wisconsin, Texas and Virginia, and has all partnership power and
          authority necessary to own or hold its properties and to conduct the
          business in which it is engaged. Except as set forth in the
          Prospectus, all of the issued partnership interests of PPREF are owned
          directly or indirectly by the Company and the Operating Partnership,
          free and clear of any perfected security interest, mortgage, pledge,
          lien, encumbrance, claim, restriction or equities or, to such
          counsel's knowledge, any unperfected security interest, mortgage,
          pledge, lien, encumbrance, claim, restriction or equities.

                  (vi)  The Shares have been duly and validly authorized and,
          when issued and delivered against payment therefor as provided herein,
          will be duly and validly issued, fully paid and non-assessable.  Upon
          payment of the purchase price and delivery of the Shares in accordance
          herewith, the Underwriter will receive good, valid and marketable
          title to the Shares, free and clear of all security interests,
          mortgages, pledges, liens, encumbrances, claims, restrictions and
          equities.  The terms of the Shares conform in all material respects to
          all statements and descriptions related thereto contained in the
          Prospectus.  The form of the certificates to be used to evidence the
          Shares are in due and proper form and comply with all applicable legal
          requirements.  The issuance of the Shares is not subject to any
          preemptive or other similar rights arising under the Declaration of
<PAGE>
 
          Trust or by-laws of the Company, Title 8 of the Corporations and
          Associations Article of the Annotated Code of Maryland, as amended, or
          any agreement or other instrument to which the Company is a party
          known to such counsel.

                  (vii)  This Agreement has been duly and validly authorized,
          executed and delivered by each of the Transaction Entities.

                  (viii) The execution, delivery and performance of this
          Agreement by each of the Transaction Entities and the consummation of
          the transactions contemplated hereby will not conflict with or result
          in a breach or violation of any of the terms or provisions of, or
          constitute a default under, any indenture, mortgage, deed of trust,
          loan agreement or other agreement or instrument known to such counsel
          to which any of the Transaction Entities is a party or by which any of
          the Transaction Entities is bound or to which any of the Properties or
          other assets of any of the Transaction Entities is subject, nor will
          such actions result in any violation of the provisions of the charter,
          by-laws, certificate of limited partnership or agreement of limited
          partnership of any of the Transaction Entities, or any statute or any
          order, rule or regulation known to such counsel of any court or
          governmental agency or body having jurisdiction over any of the
          Transaction Entities or any of their properties or assets.

                  (ix)   To such counsel's knowledge, other than as set forth in
          the Prospectus and pursuant to the Operating Partnership Agreement as
          to the Exchange Shares (as defined therein), there are no contracts,
          agreements or understandings between the Company and any person
          granting such person the right to require the Company to file a
          registration statement under the Securities Act with respect to any
          securities of the Company owned or to be owned by such person or to
          require the Company 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 Company under the Securities Act.

                  (x)    To such counsel's knowledge, there are no legal or
          governmental proceedings pending to which any Transaction Entity is a
          party or of which any property or assets of any Transaction Entity is
          the subject which are not disclosed in the Prospectus and which, if
          determined adversely to such Transaction Entity, would have a material
          adverse effect on the consolidated financial position, shareholders'
          equity, results of operations or business of the Company; and to the
          knowledge of such counsel, no such proceedings are threatened or
          contemplated by governmental authorities or threatened by others.
<PAGE>
 
                  (xi)   There are no contracts or other documents known to such
          counsel which are required to be described in the Prospectus or filed
          as exhibits to the Registration Statement by the Securities Act or by
          the Rules and Regulations which have not been described in the
          Prospectus or filed as exhibits to the Registration Statement or
          incorporated therein by reference as permitted by the Rules and
          Regulations.

                  (xii)  To such counsel's knowledge, no relationship, direct or
          indirect, exists between or among any of the Transaction Entities on
          the one hand, and the directors, trustees, officers, shareholders,
          customers or suppliers of the Transaction Entities on the other hand,
          which is required to be described in the Prospectus which is not so
          described.

                  (xiii) To such counsel's knowledge, neither the Company nor
          any Significant Subsidiary (i) is in violation of its charter, by-
          laws, certificate of limited partnership, agreement of limited
          partnership or other similar organizational document or (ii) is in
          default in any material respect, and no event has occurred which, 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 material indenture, mortgage, deed of trust, loan
          agreement or other agreement or instrument to which it is a party or
          by which it is bound or to which any of the Properties or any of its
          other properties or assets is subject and which was filed as an
          exhibit to the Registration Statement.

                  (xiv)  No consent, approval, authorization or other order of,
          or registration or filing with, any court, regulatory body,
          administrative agency or other governmental body, agency, or official
          is required on the part of the Company other than those which have
          been obtained under the Securities Act and the Exchange Act (except
          such as may be required under state securities, real estate
          syndication or Blue Sky laws governing the purchase and distribution
          of the Shares, as to which such counsel need express no opinion) for
          the valid issuance and sale of the Shares to the Underwriter as
          contemplated by this Agreement.

                  (xv)   No Transaction Entity is an "investment company" within
          the meaning of such term under the Investment Company Act of 1940 and
          the rules and regulations of the Commission thereunder.  The Shares
          have been approved for listing on the New York Stock Exchange upon
          notice of issuance.

                  (xvi)  The documents incorporated or deemed to be incorporated
          by reference in the Prospectus pursuant to Item 12 of Form S-3 under
          the Securities Act (other than the financial statements and related
          schedules and 
<PAGE>
 
          financial information and data included therein, as to which no
          opinion need be rendered), at the time they were filed with the
          Commission, complied and will comply as to form in all material
          respects with the requirements of the Exchange Act and the rules and
          regulations thereunder.

                  (xvii)  The Registration Statement was declared effective
          under the Securities Act as of the date and time specified in such
          opinion, the Prospectus was filed with the Commission pursuant to the
          subparagraph of Rule 424(b) of the Rules and Regulations specified in
          such opinion on the date specified therein and, to the knowledge of
          such counsel, no stop order suspending the effectiveness of the
          Registration Statement has been issued and, to the knowledge of such
          counsel, no proceeding for that purpose is pending or threatened by
          the Commission.

                  (xviii) The Registration Statement and the Prospectus and any
          further amendments or supplements thereto made by the Company prior to
          such Delivery Date (other than the financial statements and related
          schedules and other financial data included therein, as to which such
          counsel need express no opinion) comply as to form in all material
          respects with the requirements of the Securities Act and the Rules and
          Regulations.

                  (xix)   The statements contained in the Prospectus under the
          captions "Risk Factors," "Description of Shares of Beneficial
          Interest," "Federal Income Tax Considerations," and "Certain Federal
          Income Tax Considerations," insofar as those statements are
          descriptions of contracts, agreements or other legal documents, or
          they describe federal statutes, rules and regulations, and except to
          the extent such statements are statistics or calculations, constitute
          a fair summary thereof, and the opinion of such counsel filed as
          Exhibit 8 to the Registration Statement is confirmed and the
          Underwriter may rely upon such opinion as if it were addressed to
          them.

     In rendering such opinion, such counsel may (i) state that its opinion is
limited to matters governed by the Federal laws of the United States of America
and the corporate law of the State of Delaware and (ii) rely (to the extent such
counsel deems proper and specifies in their opinion), as to matters involving
the application of the laws of the State of Maryland upon the opinion of other
counsel of good standing, provided that such other counsel is satisfactory to
counsel for the Underwriter and furnishes a copy of its opinion to the
Underwriter; provided that such counsel shall state that it believes that both
the Underwriter and it are justified in relying upon such opinions of local
counsel.  Such counsel shall also have furnished to the Underwriter a written
statement, addressed to the Underwriter and dated such Delivery Date, in form
and substance satisfactory to the Underwriter, to the effect that (x) such
counsel has acted as counsel to the Company in connection with the preparation
of the Registration Statement and the Prospectus, 
<PAGE>
 
and (y) based on the foregoing, no facts have come to the attention of such
counsel which lead it to believe that the Registration Statement, as of the
Effective Date, contained any untrue statement of a material fact or omitted to
state a material fact required to be stated therein or necessary in order to
make the statements therein not misleading, or that the Prospectus contains any
untrue statement of a material fact or omits to state a material fact required
to be stated therein or necessary in order to make the statements therein, in
light of the circumstances under which they were made, not misleading. The
foregoing opinion and statement may be qualified by a statement to the effect
that such counsel does not assume any responsibility for the accuracy,
completeness or fairness of the statements contained in the Registration
Statement or the Prospectus except for the statements made in the Prospectus
under the captions "Description of Shares of Beneficial Interest" and "Federal
Income Tax Considerations" insofar as such statements relate to the Shares and
concern legal matters, and may state that such counsel expresses no belief with
respect to the financial statements and notes thereto and other financial and
statistical data included or incorporated by reference in, or omitted from, the
Registration Statement or the Prospectus.

            (e) The Underwriter shall have received from Chapman and Cutler,
     counsel for the Underwriter, such opinion or opinions, dated such Delivery
     Date, with respect to the issuance and sale of the Shares, the Registration
     Statement, the Prospectus and other related matters as the Underwriter may
     reasonably require, and the Company shall have furnished to such counsel
     such documents as they reasonably request for the purpose of enabling them
     to pass upon such matters.

            (f) At the time of execution of this Agreement, the Underwriter
     shall have received from Coopers & Lybrand L.L.P. a letter, in form and
     substance satisfactory to the Underwriter, addressed to the Underwriter and
     dated the date hereof (i) confirming that they are independent public
     accountants within the meaning of the Securities Act and are in compliance
     with the applicable requirements relating to the qualification of
     accountants under Rule 2-01 of Regulation S-X of the Commission, and (ii)
     stating, as of the date hereof (or, with respect to matters involving
     changes or developments since the respective dates as of which specified
     financial information is given in, or incorporated by reference in, the
     Prospectus, as of a date not more than five days prior to the date hereof),
     the conclusions and findings of such firm with respect to the financial
     information and other matters ordinarily covered by accountants' "comfort
     letters" to underwriters in connection with registered public offerings.

            (g) With respect to the letter of Coopers & Lybrand L.L.P. referred
     to in the preceding paragraph and delivered to the Underwriter concurrently
     with the execution of this Agreement (the "initial letter"), the Company
     shall have furnished to the Underwriter a letter (the "bring-down letter")
     of such accountants, addressed to the Underwriter and dated such Delivery
     Date (i) confirming that they are independent public 
<PAGE>
 
     accountants within the meaning of the Securities Act and are in compliance
     with the applicable requirements relating to the qualification of
     accountants under Rule 2-01 of Regulation S-X of the Commission, (ii)
     stating, as of the date of the bring-down letter (or, with respect to
     matters involving changes or developments since the respective dates as of
     which specified financial information is given in the Prospectus, as of a
     date not more than five days prior to the date of the bring-down letter),
     the conclusions and findings of such firm with respect to the financial
     information and other matters covered by the initial letter and (iii)
     confirming in all material respects the conclusions and findings set forth
     in the initial letter.

            (h) Each Transaction Entity shall have furnished to the Underwriter
     a certificate, dated such Delivery Date, of its Chairman of the Board, its
     President or a Vice President and its chief financial officer stating that:


                  (i)   The representations, warranties and agreements of the
          Transaction Entities in Section 1 are true and correct as of such
          Delivery Date; the Transaction Entities complied with all of their
          agreements contained herein; and the conditions set forth in Sections
          7(a) and 7(i) have been fulfilled; and

                  (ii)  They have carefully examined the Registration Statement
          and the Prospectus and, in their opinion (A) as of the Effective Date,
          the Registration Statement and Prospectus did not include any untrue
          statement of a material fact and did not omit to state a material fact
          required to be stated therein or necessary to make the statements
          therein not misleading (with respect to the Prospectus, in light of
          the circumstances in which they were made), and (B) since the
          Effective Date no event has occurred which should have been set forth
          in a supplement or amendment to the Registration Statement or the
          Prospectus.

            (i) (i) None of the Transaction Entities or any Property shall have
     sustained since the date of the latest audited financial statements
     included in the Prospectus any loss or interference with its business from
     fire, explosion, flood or other calamity, whether or not covered by
     insurance, or from any labor dispute or court or governmental action, order
     or decree, otherwise than as set forth or contemplated in the Prospectus or
     (ii) since such date there shall not have been any change in the capital
     stock or long-term debt of any Transaction Entity or any change, or any
     development involving a prospective change, in or affecting any Property or
     the general affairs, management, financial position, shareholders' equity
     or results of operations of any Transaction Entity, otherwise than as set
     forth or contemplated in the Prospectus, the effect of which, in any such
     case described in clause (i) or (ii), is, in the judgment of the
     Underwriter, so material and adverse as to make it impracticable or
     inadvisable to (x) commence or continue the offering of the units of the
     Trust to the public, or (y) enforce contracts for the sale of the 
<PAGE>
 
     units of the Trust.

            (j) Subsequent to the execution and delivery of this Agreement there
     shall not have occurred any of the following: (i) trading in securities
     generally on the New York Stock Exchange or the American Stock Exchange or
     in the over-the-counter market, or trading in any securities of the Company
     on any exchange or in the over-the-counter market, shall have been
     suspended or minimum prices shall have been established on any such
     exchange or such market by the Commission, by such exchange or by any other
     regulatory body or governmental authority having jurisdiction, (ii) a
     banking moratorium shall have been declared by Federal or state
     authorities, (iii) the United States shall have become engaged in
     hostilities, there shall have been an escalation in hostilities involving
     the United States or there shall have been a declaration of a national
     emergency or war by the United States or (iv) there shall have occurred
     such a material adverse change in general economic, political or financial
     conditions (or the effect of international conditions on the financial
     markets in the United States shall be such) as to make it, in the judgment
     of the Underwriter, impracticable or inadvisable (x) commence of continue
     the offering of the units of the Trust to the public, or (y) enforce
     contracts for the sale of the units of the Trust.

            (k) The Shares shall be approved for listing on the New York Stock
     Exchange, Inc., subject only to official notice of issuance.

            (l) The Transaction Entities shall not have failed at or prior to
     such Delivery Date to have performed or complied with any of their
     agreements herein contained and required to be performed or complied with
     by them hereunder at or prior to such Delivery Date.

            (m) On the Delivery Date, counsel for the Underwriter shall have
     been furnished with such documents and opinions as it may require for the
     purpose of enabling it to pass upon the issuance and sale of the Shares as
     herein contemplated and related proceedings, or in order to evidence the
     accuracy of any of the representations or warranties, or the fulfillment of
     any of the conditions, herein contained; and all proceedings taken by the
     Transaction Entities in connection with the issuance and sale of the Shares
     as herein contemplated shall be satisfactory in form and substance to the
     Underwriter and counsel for the Underwriter.

            (n) The Company shall have furnished or caused to be furnished to
     the Underwriter such further certificates and documents as the Underwriter
     shall have reasonably requested.

     All opinions, letters, evidence and certificates mentioned above or
elsewhere in this 
<PAGE>
 
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
Underwriter.

     Any certificate or document signed by any officer of the Transaction
Entities and delivered to the Underwriter, or to counsel for the Underwriter,
shall be deemed a representation and warranty by the Transaction Entities to the
Underwriter as to the statements made therein.

     8.  Effective Date of Agreement.  This Agreement shall become effective:
(i) upon the execution hereof by the parties hereto; or (ii) if, at the time
this Agreement is executed and delivered, it is necessary for the Registration
Statement or a post-effective amendment thereto to be declared effective before
the offering of the Shares may commence, when notification of the effectiveness
of the Registration Statement or such post-effective amendment has been released
by the Commission.


       9.  [Intentionally Left Blank].

       10. Indemnification and Contribution.

       (a) The Transaction Entities, jointly and severally, shall indemnify and
hold harmless the Underwriter, its officers and employees and each person, if
any, who controls the Underwriter within the meaning of the Securities Act, from
and against any loss, claim, damage or liability, joint or several, or any
action in respect thereof (including, but not limited to, any loss, claim,
damage, liability or action relating to purchases and sales of Shares), to which
that Underwriter, officer, employee or controlling person may become subject,
under the Securities Act or otherwise, insofar as such loss, claim, damage,
liability or action arises out of, or is based upon, (i) any untrue statement or
alleged untrue statement of a material fact contained (A) in any Preliminary
Prospectus, the Registration Statement or the Prospectus or in any amendment or
supplement thereto or (B) in any blue sky application or other document prepared
or executed by the Company (or based upon any written information furnished by
the Company) specifically for the purpose of qualifying any or all of the Shares
under the securities laws of any state or other jurisdiction (any such
application, document or information being hereinafter called a "Blue Sky
Application"), (ii) the omission or alleged omission to state in any Preliminary
Prospectus, the Registration Statement or the Prospectus, or in any amendment or
supplement thereto, or in any Blue Sky Application any material fact required to
be stated therein or necessary to make the statements therein not misleading
(with respect to the Prospectus, in light of the circumstances under which they
were made), or (iii) any act or failure to act or any alleged act or failure to
act by the Underwriter in connection with, or relating in any manner to, the
Shares or the offering contemplated hereby, and which is included as part of or
referred to in any loss, claim, damage, 
<PAGE>
 
liability or action arising out of or based upon matters covered by clause (i)
or (ii) above (provided that the Transaction Entities shall not be liable under
this clause (iii) to the extent that it is determined in a final judgment by a
court of competent jurisdiction that such loss, claim, damage, liability or
action resulted directly from any such acts or failures to act undertaken or
omitted to be taken by such Underwriter through its gross negligence or willful
misconduct), and shall reimburse the Underwriter and each such officer, employee
or controlling person promptly upon demand for any legal or other expenses
reasonably incurred by that Underwriter, officer, employee or controlling person
in connection with investigating or defending or preparing to defend against any
such loss, claim, damage, liability or action as such expenses are incurred;
provided, however, that the Transaction Entities shall not be liable in any such
case to the extent that any such loss, claim, damage, liability or action arises
out of, or is based upon, any untrue statement or alleged untrue statement or
omission or alleged omission made in any Preliminary Prospectus, the
Registration Statement or the Prospectus, or in any such amendment or
supplement, or in any Blue Sky Application, in reliance upon and in conformity
with written information concerning the Underwriter furnished to the Company by
or on behalf of the Underwriter specifically for inclusion therein. The
foregoing indemnity agreement is in addition to any liability which the
Transaction Entities may otherwise have to the Underwriter or to any officer,
employee or controlling person of that Underwriter.

       (b) The Underwriter shall indemnify and hold harmless each Transaction
Entity, its officers and employees, each of its directors or trustees, and each
person, if any, who controls each Transaction Entity within the meaning of the
Securities Act, from and against any loss, claim, damage or liability, joint or
several, or any action in respect thereof, to which each Transaction Entity or
any such director, trustee, officer or controlling person may become subject,
under the Securities Act or otherwise, insofar as such loss, claim, damage,
liability or action arises out of, or is based upon, (i) any untrue statement or
alleged untrue statement of a material fact contained (A) in any Preliminary
Prospectus, the Registration Statement or the Prospectus or in any amendment or
supplement thereto, or (B) in any Blue Sky Application or (ii) the omission or
alleged omission to state in any Preliminary Prospectus, the Registration
Statement or the Prospectus, or in any amendment or supplement thereto, or in
any Blue Sky Application any material fact required to be stated therein or
necessary to make the statements therein not misleading, but in each case only
to the extent that the untrue statement or alleged untrue statement or omission
or alleged omission was made in reliance upon and in conformity with written
information concerning the Underwriter furnished to the Company by or on behalf
of that Underwriter specifically for inclusion therein, and shall reimburse each
Transaction Entity and any such director, trustee, officer or controlling person
for any legal or other expenses reasonably incurred by each Transaction Entity
or any such director, trustee, officer or controlling person in connection with
investigating or defending or preparing to defend against any such loss, claim,
damage, liability or action as such expenses are incurred.  The foregoing
indemnity agreement is in addition to any liability which the Underwriter may
otherwise have to each Transaction Entity or any such director, trustee,
officer, employee or controlling person.
<PAGE>
 
       (c) Promptly after receipt by an indemnified party under this Section 10
of notice of any claim or the commencement of any action, the indemnified party
shall, if a claim in respect thereof is to be made against the indemnifying
party under this Section 10, notify the indemnifying party in writing of the
claim or the commencement of that action; provided, however, that the failure to
notify the indemnifying party shall not relieve it from any liability which it
may have under this Section 10 except to the extent it has been materially
prejudiced by such failure and, provided further, that the failure to notify the
indemnifying party shall not relieve it from any liability which it may have to
an indemnified party otherwise than under this Section 10.  If any such claim or
action shall be brought against an indemnified party, and it shall notify the
indemnifying party thereof, the indemnifying party shall be entitled to
participate therein and, to the extent that it wishes, jointly with any other
similarly notified indemnifying party, to assume the defense thereof with
counsel reasonably satisfactory to the indemnified party.  After notice from the
indemnifying party to the indemnified party of its election to assume the
defense of such claim or action, the indemnifying party shall not be liable to
the indemnified party under this Section 10 for any legal or other expenses
subsequently incurred by the indemnified party in connection with the defense
thereof other than reasonable costs of investigation; provided, however, that
the Underwriter shall have the right to employ counsel to represent jointly the
Underwriter and their respective officers, employees and controlling persons who
may be subject to liability arising out of any claim in respect of which
indemnity may be sought by the Underwriter against the Transaction Entities
under this Section 10 if, in the reasonable judgment of the Underwriter, it is
advisable for the Underwriter, officers, employees and controlling persons to be
jointly represented by separate counsel, and in that event the fees and expenses
of such separate counsel shall be paid by the indemnifying party.  No
indemnifying party shall (i) without the prior written consent of the
indemnified parties (which consent shall not be unreasonably withheld), settle
or compromise or consent to the entry of any judgment with respect to any
pending or threatened claim, action, suit or proceeding in respect of which
indemnification or contribution may be sought hereunder (whether or not the
indemnified parties are actual or potential parties to such claim or action)
unless such settlement, compromise or consent includes an unconditional release
of each indemnified party from all liability arising out of such claim, action,
suit or proceeding, or (ii) be liable for any settlement of any such action
effected without its written consent (which consent shall not be unreasonably
withheld), but if settled with the consent of the indemnifying party or if there
be a final judgment of the plaintiff in any such action, the indemnifying party
agrees to indemnify and hold harmless any indemnified party from and against any
loss or liability by reason of such settlement or judgment.

       (d) If the indemnification provided for in this Section 10 shall for any
reason be unavailable to or insufficient to hold harmless an indemnified party
under Section 10(a) or 10(c) in respect of any loss, claim, damage or liability,
or any action in respect thereof, referred to therein, then each indemnifying
party shall, in lieu of indemnifying such indemnified party, contribute to the
amount paid or payable by such indemnified party as a result of such loss,
claim, 
<PAGE>
 
damage or liability, or action in respect thereof, (i) in such proportion as
shall be appropriate to reflect the relative benefits received by the
Transaction Entities on the one hand and the Underwriter on the other from the
offering of the Shares or (ii) if the allocation provided by clause (i) above is
not permitted by applicable law, in such proportion as is appropriate to reflect
not only the relative benefits referred to in clause (i) above but also the
relative fault of the Transaction Entities on the one hand and the Underwriter
on the other with respect to the statements or omissions which resulted in such
loss, claim, damage or liability, or action in respect thereof, as well as any
other relevant equitable considerations. The relative benefits received by the
Transaction Entities on the one hand and the Underwriter on the other with
respect to such offering shall be deemed to be in the same proportion as the
total net proceeds from the offering of the Shares purchased under this
Agreement (before deducting expenses) received by the Transaction Entities, on
the one hand, and the total underwriting discounts and commissions received by
the Underwriter with respect to the Shares purchased under this Agreement, on
the other hand, bear to the total gross proceeds from the offering of the Shares
under this Agreement, in each case as set forth in the table on the cover page
of the Prospectus. The relative fault shall be determined by reference to
whether the untrue or alleged untrue statement of a material fact or omission or
alleged omission to state a material fact relates to information supplied by the
Transaction Entities or the Underwriter, the intent of the parties and their
relative knowledge, access to information and opportunity to correct or prevent
such statement or omission. The Transaction Entities and the Underwriter agree
that it would not be just and equitable if contributions pursuant to this
Section were to be determined by pro rata allocation or by any other method of
allocation which does not take into account the equitable considerations
referred to herein. The amount paid or payable by an indemnified party as a
result of the loss, claim, damage or liability, or action in respect thereof,
referred to above in this Section shall be deemed to include, for purposes of
this Section 10(d), any legal or other expenses reasonably incurred by such
indemnified party in connection with investigating or defending any such action
or claim. Notwithstanding the provisions of this Section 10(d), no Underwriter
shall be required to contribute any amount in excess of the amount by which the
total price at which the Shares underwritten by it and distributed to the public
was offered to the public exceeds the amount of any damages which the
Underwriter has otherwise paid or become liable to pay by reason of any 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.

       (e) The Underwriter confirms and each Transaction Entity acknowledges
that (i) the statements with respect to the offering of the Shares by the
Underwriter set forth on the cover page of, (ii) the legend concerning over-
allotments on the inside front cover page of, and (iii) pursuant to Item 508 of
Regulation S-K of the Securities Act, the information contained in the second,
fourth, fifth, sixth and eighth paragraphs, and the seventh paragraph as to the
Underwriter, in the section captioned "Underwriting" in, the Prospectus are
correct and 
<PAGE>
 
constitute the only information concerning the Underwriter furnished in writing
to the Company by or on behalf of the Underwriter specifically for inclusion in
the Registration Statement and the Prospectus.

       11.  Termination.  The obligations of the Underwriter hereunder may be
terminated by the Underwriter by notice given to and received by the Company
prior to delivery of and payment for the Shares if, prior to that time, any of
the events described in Sections 7(i), 7(j) or 7(l) shall have occurred or if
the Underwriter shall decline to purchase the Shares for any reason permitted
under this Agreement.

       12.  Reimbursement of Underwriter's Expenses.  If the Company shall fail
to tender the Shares for delivery to the Underwriter by reason of any failure,
refusal or inability on the part of the Transaction Entities to perform any
agreement on their part to be performed, or because any other condition of the
Underwriter's obligations hereunder required to be fulfilled by the Transaction
Entities is not fulfilled (other than the condition set forth in Section 7(j)
herein), the Transaction Entities will reimburse the Underwriter for all
reasonable out-of-pocket expenses (including fees and disbursements of counsel)
incurred by the Underwriter in connection with this Agreement and the proposed
purchase of the Shares, and upon demand the Transaction Entities shall pay the
full amount thereof to the Underwriter.

       13.  Notices, etc.  All statements, requests, notices and agreements
hereunder shall be in writing, and:

            (a) if to the Underwriter, shall be delivered or sent by mail, telex
     or facsimile transmission to A.G. Edwards & Sons, Inc., One North Jefferson
     Avenue, St. Louis, Missouri 63103, Attention: Syndicate (Fax: (314) 289-
     7387); with a copy to Paul C. Kosin, Esq., Chapman and Cutler, 111 West
     Monroe Street, Chicago, Illinois 60603-4080 (Fax: 312-701-2361);

            (b) if to the Transaction Entities shall be delivered or sent by
     mail, telex or facsimile transmission to the Company, 3890 W. Northwest
     Highway, Suite 400, Dallas, Texas 75220, Attention: Michael V. Prentiss
     (Fax: 214-350-2408); with a copy to Randall S. Parks, Esq., Hunton &
     Williams, 951 East Byrd Street, Richmond, Virginia 23219 (Fax: 804-788-
     8218).

Any such statements, requests, notices or agreements shall take effect at the
time of receipt thereof.

       14.  Persons Entitled to Benefit of Agreement.  This Agreement shall
inure to the benefit of and be binding upon the Underwriter, the Transaction
Entities and their respective personal representatives and successors.  This
Agreement and the terms and provisions hereof are 
<PAGE>
 
for the sole benefit of only those persons, except that (A) the representations,
warranties, indemnities and agreements of the Transaction Entities contained in
this Agreement shall also be deemed to be for the benefit of the person or
persons, if any, who control the Underwriter within the meaning of Section 15 of
the Securities Act and (B) the indemnity agreement of the Underwriter contained
in Section 10(b) of this Agreement shall be deemed to be for the benefit of
directors and trustees of the Transaction Entities, officers of the Company who
have signed the Registration Statement and any person controlling the
Transaction Entities within the meaning of Section 15 of the Securities Act.
Nothing in this Agreement is intended or shall be construed to give any person,
other than the persons referred to in this Section 14, any legal or equitable
right, remedy or claim under or in respect of this Agreement or any provision
contained herein.

       15.  Survival.  The respective indemnities, representations, warranties
and agreements of the Transaction Entities and the Underwriter contained in this
Agreement or made by or on behalf on them, respectively, pursuant to this
Agreement, shall survive the delivery of and payment for the Shares and shall
remain in full force and effect, regardless of any investigation made by or on
behalf of any of them or any person controlling any of them.

       16.  Definition of the Terms "Business Day" and "Subsidiary."  For
purposes of this Agreement, (a) "business day" means any day on which the New
York Stock Exchange, Inc. is open for trading and (b) "subsidiary" has the
meaning set forth in Rule 405 of the Rules and Regulations.

       17.  Governing Law.  This Agreement shall be governed by and construed in
accordance with the laws of New York.

       18.  Counterparts.  This Agreement may be executed in one or more
counterparts and, if executed in more than one counterpart, the executed
counterparts shall each be deemed to be an original but all such counterparts
shall together constitute one and the same instrument.

       19.  Headings.  The headings herein are inserted for convenience of
reference only and are not intended to be part of, or to affect the meaning or
interpretation of, this Agreement.
<PAGE>
 
     If the foregoing correctly sets forth the agreement between the Company and
the Underwriter, please indicate your acceptance in the space provided for that
purpose below.


                                      Very truly yours,


                                      Prentiss Properties Trust


                                      By:  /s/ Michael A. Ernst
                                         --------------------------------------
                                         Name: Michael A. Ernst
                                         Title: Vice President and Treasurer



                                      Prentiss Properties Acquisition 
                                        Partners, L.P.

                                        By:  Prentiss Properties I, Inc., its 
                                        general partner


                                            By: /s/ Michael A. Ernst         
                                               --------------------------------
                                            Name: Michael A. Ernst
                                              Title: Vice President and
                                              Treasurer



                                      Prentiss Properties I, Inc.


                                      By:  /s/ Michael A. Ernst            
                                         --------------------------------------
                                      Name: Michael A. Ernst
                                      Title: Vice President and Treasurer


Accepted:
A.G. Edwards & Sons, Inc.


By  /s/ Douglas D. Rubenstein
  ----------------------------
   Authorized Representative
   Douglas D. Rubenstein
   Managing Director


<PAGE>
 
                                                                       Exhibit 8
                                                                       ---------


                              February 23, 1998


Prentiss Properties Trust
3890 W. Northwest Highway, Suite 400
Dallas, Texas  75220

A.G. Edwards & Sons, Inc.
One North Jefferson Avenue
St. Louis, Missouri  63103

                           Prentiss Properties Trust
                           -------------------------
                               Qualification as
                               ----------------
                         Real Estate Investment Trust
                         ----------------------------

Ladies and Gentlemen:

  We have acted as counsel to Prentiss Properties Trust, a Maryland real estate
investment trust (the "Trust"), in connection with (i) the preparation of a Form
S-3 registration statement filed with the Securities and Exchange Commission
("SEC") on October 16, 1997 (No. 333-38079), as amended through the date hereof
(the "Registration Statement"), (ii) the offering and sale (the "Offering") of
1,198,157 common shares of beneficial interest, par value $0.01 per share (the
"Common Shares"), of the Trust pursuant to a prospectus dated October 24, 1997
(the "Prospectus") and a related prospectus supplement dated February 18, 1998
(the "Prospectus Supplement") relating to the Registration Statement, and (iii)
the Trust's contribution of the net proceeds of the Offering to Prentiss
Properties Acquisition Partners, L.P., a Delaware limited partnership (the
"Operating Partnership"), in exchange for an additional limited partnership
interest in the Operating Partnership.  You have requested our opinion regarding
certain U.S. federal income tax matters in connection with the Offering.

  As of February 5, 1998, the Operating Partnership owns, directly or
indirectly, equity interests in 217 office and industrial properties (the
"Properties").  The Operating Partnership owns and will own interests in certain
Properties through subsidiary partnerships, joint ventures, and limited
liability companies (collectively, the "Noncorporate Subsidiaries").

  The Company owns 100% of the stock of Prentiss Properties I, Inc., a Delaware
corporation and the general partner of the Operating Partnership ("PP I").  The
Operating Partnership owns all of the nonvoting stock of Prentiss Properties
Limited, Inc., a Delaware corporation ("PPL"), representing 95% of the economic
interests therein.  All of the voting stock 
<PAGE>
 
of PPL, representing 5% of the economic interests therein, is owned by Michael
V. Prentiss. PPL owns 100% of the outstanding stock of Prentiss Properties II,
Inc., a Delaware corporation ("PP II"). The Operating Partnership also owns all
of the nonvoting stock of Prentiss Properties Limited II, Inc., a Delaware
corporation ("PPL II"), representing 95% of the economic interests therein. All
of the voting stock of PPL II, representing 5% of the economic interests
therein, is owned by Michael V. Prentiss.

          In giving this opinion, we have examined the following:

1.    the Trust's Amended and Restated Declaration of Trust, as duly filed with
the Department of Assessments and Taxation of the State of Maryland on October
16, 1996;
 
2.    the Trust's Bylaws;

3.    the Prospectus and the Prospectus Supplement;

4.    the Second Amended and Restated Agreement of Limited Partnership of the
Operating Partnership, dated October 22, 1996 (the "Operating Partnership
Agreement"), among PP I, as general partner, and several limited partners;

5.    the partnership agreements, joint venture agreements, and operating
agreements of the Noncorporate Subsidiaries (together with the Operating
Partnership Agreement, the "Partnership Agreements");

6.    the Articles of Incorporation and Bylaws of PPL;

7.    the Articles of Incorporation and Bylaws of PPL II;

8.    the Amended and Restated Certificate of Incorporation and the Bylaws of PP
II; and

9.    such other documents as we have deemed necessary or appropriate for
purposes of this opinion.

          In connection with the opinions rendered below, we have assumed, with
your consent, that:

1.    each of the documents referred to above has been duly authorized,
executed, and delivered; is authentic, if an original, or is accurate, if a
copy; and has not been amended;

2.    during its taxable year ending December 31, 1998 and future taxable years,
the Trust has operated and will continue to operate in a manner that makes and
will continue to make the 


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