DEED OF TRUST, SECURITY AGREEMENT, FIXTURE FILING, FINANCING STATEMENT AND ASSIGNMENT OF LEASES AND RENTS

Exhibit 10.66

Recording requested by:

And when recorded mail to:

Otten, Johnson, Robinson,

Neff & Ragonetti, P.C.

950 Seventeenth Street

Suite 1600

Denver, Colorado 80202

Attention: Cara D. Hinshaw, Esq.

Tax Account Nos. R272228 and R128925

DEED OF TRUST, SECURITY AGREEMENT, FIXTURE FILING, FINANCING

STATEMENT AND ASSIGNMENT OF LEASES AND RENTS

THIS DEED OF TRUST, SECURITY AGREEMENT, FIXTURE FILING, FINANCING STATEMENT AND ASSIGNMENT OF LEASES AND RENTS (this “Deed of Trust”) is given as of November 7, 2007, by KBS ADP PLAZA, LLC, a Delaware limited liability company (“Grantor”), to CHICAGO TITLE INSURANCE COMPANY OF OREGON (“Trustee”), for the use and benefit of AMERICAN GENERAL LIFE INSURANCE COMPANY, a Texas corporation (“Beneficiary”).

Article 1

PARTIES, PROPERTY, AND DEFINITIONS

The following terms and references shall have the meanings indicated:

1.1 Beneficiary: The Beneficiary named in the introductory paragraph of this Deed of Trust, whose legal address is c/o AIG Global Investment Corp., 1 SunAmerica Center, 38th Floor, Century City, Los Angeles, California 90067-6022, together with any future holder of the Note.

1.2 Chattels: All goods, fixtures, inventory, equipment, building and other materials, supplies, and other tangible personal property of every nature, whether now owned or hereafter acquired by Grantor, used, intended for use, or reasonably required in the construction, development, or operation of the Property, together with all accessions thereto, replacements and substitutions therefor, and proceeds thereof.

1.3 Default: Any matter which, with the giving of notice, passage of time, or both, would constitute an Event of Default.

1.4 Environmental Assessment: The Phase I Environmental Site Assessment dated July 24, 2007 prepared by URS Corporation for the benefit of Beneficiary.

1.5 Environmental Claims: Any and all administrative, regulatory or judicial actions, suits, demands, demand letters, claims, liens, notices of non-compliance or violation, investigations or proceedings relating in any way to any Environmental Law (hereafter “Claims”) or any permit issued under any such Environmental Law, including without limitation (a) any and all Claims by governmental or regulatory authorities for enforcement, cleanup, removal, response, remedial or other actions or damages pursuant to any applicable Environmental Law, and (b) any and all Claims by any third party seeking damages, contribution, indemnification, cost recovery, compensation or injunctive relief resulting from Hazardous Substances or arising from alleged injury or threat of injury to health, safety or the environment.

1.6 Environmental Law: Any federal, state or local law, whether common law, court or administrative decision, statute, rule, regulation, ordinance, court order or decree, or administrative order or any administrative policy or guidelines concerning action levels of a governmental authority (federal, state or local) now or hereafter in effect relating to the environment, public health, occupational safety, industrial hygiene, any Hazardous Substance (including, without limitation, the disposal, generation, manufacture, presence, processing, production, Release, storage, transportation, treatment or use thereof), or the environmental conditions on, under or about the Property, as amended and as in effect from time to time (including, without limitation, the following statutes and all regulations thereunder as amended and in effect from time to time: the Comprehensive Environmental Response, Compensation, and Liability Act of 1980, as amended, 42 U.S.C. §§ 9601, et seq. ; the Superfund Amendments and Reauthorization Act of 1986, Title III, 42 U.S.C. §§ 11001, et seq. ; the Clean Air Act, 42 U.S.C. §§ 7401, et seq. ; the Safe Drinking Water Act, 42 U.S.C. §§ 300(f), et seq. ; the Solid Waste Disposal Act, 42 U.S.C. §§ 6901, et seq. ; the Hazardous Materials Transportation Act, as amended, 49 U.S.C. §§ 5101, et seq. ; the Resource Conservation and Recovery Act, as amended, 42 U.S.C. §§ 6901, et seq. ; the Federal Water Pollution Control Act, as amended, 33 U.S.C. §§ 1251, et seq. ; the Toxic Substances Control Act of 1976, 15 U.S.C. §§ 2601, et seq. ; the Occupational Safety and Health Act, 29 U.S.C. §§ 651, et seq. ; and any successor statutes and regulations to the foregoing).

1.7 ERISA: The Employee Retirement Income Security Act of 1974, as amended, together with all rules and regulations issued thereunder.

1.8 Event of Default: As defined in Article 6.

1.9 Grantor: The Grantor named in the introductory paragraph of this Deed of Trust (Taxpayer I.D. No. 26-0607144; Organizational I.D. No. 4395424), whose legal address is c/o KBS Capital Advisors LLC, 620 Newport Center Drive, Suite 1300, Newport Beach, California 92660, together with any future owner of the Property or any part thereof or interest therein.

1.10 Hazardous Substances: Collectively, (a) any chemicals, materials or substances defined as or included in the definition of “hazardous substances,” “hazardous

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wastes,” “hazardous materials,” “extremely hazardous wastes,” “restricted hazardous wastes,” “toxic substances,” “toxic pollutants,” “contaminants” or “pollutants,” or words of similar import, under any applicable Environmental Law; and (b) any other chemical, material or substance, exposure to which is prohibited, limited or regulated by any governmental authority, including, without limitation, asbestos and asbestos-containing materials in any form, lead-based paint, any radioactive materials and polychlorinated biphenyls (“PCBs”), or substances or compounds containing PCBs.

1.11 Indemnitees: Collectively, Beneficiary and Beneficiary’s officers, directors, employees, agents, affiliates, successors and assigns.

1.12 Insurance Agreement: The Agreement Concerning Insurance Requirements of even date herewith executed by Grantor for the benefit of Beneficiary.

1.13 Intangible Personalty: The right to use all trademarks and trade names and symbols or logos used in connection therewith, or any modifications or variations thereof, in connection with the operation of the improvements existing or to be constructed on the Property, together with all accounts, deposit accounts, letter of credit rights, investment property, monies in the possession of Beneficiary (including, without limitation, proceeds from insurance, retainages and deposits for taxes and insurance), Permits, contract rights (including, without limitation, rights to receive insurance proceeds) and general intangibles (whether now owned or hereafter acquired, and including proceeds thereof) relating to or arising from Grantor’s ownership, use, operation, leasing, or sale of all or any part of the Property, specifically including but in no way limited to any right which Grantor may have or acquire to transfer any development rights from the Property to other real property, and any development rights which may be so transferred.

1.14 Lease Certificate: The Certificate Concerning Leases and Financial Condition of even date herewith made by Grantor to Beneficiary concerning Leases of the Property.

1.15 Leases: Any and all leases, subleases and other agreements under the terms of which any person other than Grantor has or acquires any right to occupy or use the Property, or any part thereof.

1.16 Loan: The loan from Beneficiary to Grantor evidenced by the Note.

1.17 Loan Application: The Summary of Loan Terms executed as of July 31, 2007 on behalf of Grantor and Beneficiary with respect to the Loan.

1.18 Loan Documents: The Note, all of the deeds of trust, mortgages and other instruments and documents securing or executed and delivered in connection with the Note, including this Deed of Trust, the Reserve Agreement, the TI/LC Guaranty, the TI/LC Reserve Agreement, the Insurance Agreement, the Lease Certificate and each other document executed or delivered in connection with the transaction pursuant to which the Note has been executed and delivered. The term “Loan Documents” also includes all modifications, extensions, renewals, and replacements of each document referred to above.

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1.19 Material Adverse Effect: The occurrence or existence of a condition or event which would have a material adverse effect on (a) the business, profits, operations or financial condition of Grantor, (b) the ability of Grantor to pay any amounts under the Loan Documents as they become due, or (c) the value of the Property.

1.20 Note: Grantor’s Amended and Restated Promissory Note of even date herewith, payable to the order of Beneficiary in the principal face amount of $20,900,000.00, the last payment under which is due on October 1, 2013, or, if extended by Beneficiary pursuant to its terms, October 1, 2018, unless such due date is accelerated, together with all renewals, extensions and modifications of such promissory note. All terms and provisions of the Note are incorporated by this reference in this Deed of Trust.

1.21 Permits: All permits, licenses, certificates and authorizations necessary for the beneficial development, ownership, use, occupancy, operation and maintenance of the Property.

1.22 Permitted Exceptions: The matters (excluding matters of survey) set forth in Schedule B-I of the title insurance policy insuring the lien created by this Deed of Trust, in form and substance satisfactory to, and accepted by, Beneficiary, that Grantor has caused to be delivered to Beneficiary in connection with the Loan.

1.23 Property: The tract or tracts of land described in Exhibit A attached, together with the following:

(a) All buildings, structures, and improvements now or hereafter located on such tract or tracts, as well as all rights-of-way, easements, and other appurtenances thereto;

(b) Any land lying between the boundaries of such tract or tracts and the center line of any adjacent street, road, avenue, or alley, whether opened or proposed;

(c) All of the rents, income, receipts, revenues, issues and profits of and from such tract or tracts and improvements;

(d) All (i) water and water rights (whether decreed or undecreed, tributary, nontributary or not nontributary, surface or underground, or appropriated or unappropriated); (ii) ditches and ditch rights; (iii) spring and spring rights; (iv) reservoir and reservoir rights; and (v) shares of stock in water, ditch and canal companies and all other evidence of such rights, which are now owned or hereafter acquired by Grantor and which are appurtenant to or which have been used in connection with such tract or tracts or improvements;

(e) All minerals, crops, timber, trees, shrubs, flowers, and landscaping features now or hereafter located on, under or above such tract or tracts;

(f) All machinery, apparatus, equipment, fittings, fixtures (whether actually or constructively attached, and including all trade, domestic, and ornamental fixtures) now or hereafter located in, upon, or under such tract or tracts or improvements and used or usable in connection with any present or future operation thereof, including but not limited to all

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heating, air-conditioning, freezing, lighting, laundry, incinerating and power equipment; engines; pipes; pumps; tanks; motors; conduits; switchboards; plumbing, lifting, cleaning, fire prevention, fire extinguishing, refrigerating, ventilating, cooking, and communications apparatus; boilers, water heaters, ranges, furnaces, and burners; appliances; vacuum cleaning systems; elevators; escalators; shades; awnings; screens; storm doors and windows; stoves; refrigerators; attached cabinets; partitions; ducts and compressors; rugs and carpets; draperies; and all additions thereto and replacements therefor;

(g) All development rights associated with such tract or tracts, whether previously or subsequently transferred to such tract or tracts from other real property or now or hereafter susceptible of transfer from such tract or tracts to other real property;

(h) All awards and payments, including interest thereon, resulting from the exercise of any right of eminent domain or any other public or private taking of, injury to, or decrease in the value of, any of such property; and

(i) All other and greater rights and interests of every nature in such tract or tracts and in the possession or use thereof and income therefrom, whether now owned or subsequently acquired by Grantor.

1.24 Release: Disposing, discharging, injecting, spilling, leaking, leaching, dumping, emitting, escaping, emptying, seeping, placing and the like, into or upon any land or water or air, or otherwise entering into the environment.

1.25 Reserve Agreement: The Reserve Agreement of even date herewith by and among Grantor, Beneficiary and the “Servicer” referenced therein.

1.26 Secured Obligations: All present and future obligations of Grantor to Beneficiary evidenced by or contained in the Note, this Deed of Trust and all other Loan Documents, whether stated in the form of promises, covenants, representations, warranties, conditions, or prohibitions or in any other form, excluding, however, the provisions of Section 4.26 of this Deed of Trust. If the maturity of the Note secured by this Deed of Trust is accelerated, the Secured Obligations shall include an amount equal to any prepayment fee or premium which would be payable under the terms of the Note as if the Note were prepaid in full on the date of the acceleration. If under the terms of the Note no voluntary prepayment would be permissible on the date of such acceleration, then the prepayment fee or premium to be included in the Secured Obligations shall be equal to one hundred fifty percent (150%) of the highest prepayment fee or premium set forth in the Note, calculated as of the date of such acceleration, as if prepayment were permitted on such date.

1.27 TI/LC Guaranty: The Tenant Improvements and Leasing Commissions Guaranty Agreement of even date herewith made by KBS REIT Properties, LLC, a Delaware limited liability company, for the benefit of Beneficiary.

1.28 TI/LC Reserve Agreement: The Tenant Improvements and Leasing Commissions Reserve Agreement of even date herewith by and among Grantor, Beneficiary and the “Servicer” referenced therein.

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1.29 Trustee: The Trustee named in the introductory paragraph of this Deed of Trust, whose address is 10135 SE Sunnyside Road, Suite 200, Clackamas, Oregon 97015.

Article 2

GRANTING CLAUSE

2.1 Grant to Trustee. As security for the Secured Obligations, Grantor hereby grants, bargains, sells, warrants and conveys the Property to Trustee, in trust, with power of sale, for the use and benefit of Beneficiary, and subject to all provisions hereof.

2.2 Security Interest to Beneficiary. As additional security for the Secured Obligations, Grantor hereby grants to Beneficiary a security interest in the Property, Chattels and Intangible Personalty. To the extent any of the Property, Chattels or Intangible Personalty may be or have been acquired with funds advanced by Beneficiary under the Loan Documents, this security interest is a purchase money security interest. This Deed of Trust constitutes a security agreement under the Uniform Commercial Code of the state in which the Property is located (the “Code”) with respect to any part of the Property, Chattels and Intangible Personalty that may or might now or hereafter be or be deemed to be personal property, fixtures or property other than real estate (all collectively hereinafter called “Collateral”); all of the terms, provisions, conditions and agreements contained in this Deed of Trust pertain and apply to the Collateral as fully and to the same extent as to any other property comprising the Property, and the following provisions of this Section shall not limit the generality or applicability of any other provisions of this Deed of Trust but shall be in addition thereto:

(a) The Collateral shall be used by Grantor solely for business purposes, and all Collateral (other than the Intangible Personalty) shall be installed upon the real estate comprising part of the Property for Grantor’s own use or as the equipment and furnishings furnished by Grantor, as landlord, to tenants of the Property;

(b) The Collateral (other than the Intangible Personalty) shall be kept at the real estate comprising a part of the Property, and shall not be removed therefrom without the consent of Beneficiary (being the Secured Party as that term is used in the Code); and the Collateral (other than the Intangible Personalty) may be affixed to such real estate but shall not be affixed to any other real estate;

(c) No financing statement covering any of the Collateral or any proceeds thereof is on file in any public office (except for financing statements that will be terminated concurrently with the recording of this Deed of Trust); and Grantor will, at its cost and expense, upon demand, furnish to Beneficiary such further information and will execute and deliver to Beneficiary such financing statements and other documents in form satisfactory to Beneficiary and will do all such acts and things as Beneficiary may at any time or from time to time reasonably request or as may be necessary or appropriate to establish and maintain a perfected first-priority security interest in the Collateral as security for the Secured Obligations, subject to no adverse liens or encumbrances; and Grantor will pay the cost of filing the same or filing or recording such financing statements or other documents and this instrument in all public offices wherever filing or recording is deemed by Beneficiary to be necessary or desirable;

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(d) The terms and provisions contained in this Section and in Section 7.6 of this Deed of Trust shall, unless the context otherwise requires, have the meanings and be construed as provided in the Code; and

(e) This Deed of Trust constitutes a financing statement under the Code with respect to the Collateral. As such, this Deed of Trust covers all items of the Collateral that are or are to become fixtures. The filing of this Deed of Trust in the real estate records of the county where the Property is located shall also operate as a fixture filing in accordance with Section 79.0502 of the Code. Information concerning the security interests created hereby may be obtained from Beneficiary. Grantor is the “Debtor” and Beneficiary is the “Secured Party” (as those terms are defined and used in the Code) insofar as this Deed of Trust constitutes a financing statement.

2.3 Environmental Provisions Not Secured . Notwithstanding any provision of this Deed of Trust or any other Loan Document, the obligations of Grantor arising under Section 4.26 of this Deed of Trust are not, and shall not be, Secured Obligations under this Deed of Trust.

Article 3

GRANTOR’S REPRESENTATIONS AND WARRANTIES

3.1 Warranty of Title. Grantor represents and warrants to Beneficiary that:

(a) Grantor has good and marketable fee simple title to the Property, and such fee simple title is free and clear of all liens, encumbrances, security interests and other claims whatsoever, subject only to the Permitted Exceptions;

(b) Grantor is the sole and absolute owner of the Chattels and the Intangible Personalty, free and clear of all liens, encumbrances, security interests and other claims whatsoever, subject only to the Permitted Exceptions;

(c) This Deed of Trust is a valid and enforceable first lien and security interest on the Property, Chattels and Intangible Personalty, subject only to the Permitted Exceptions; and

(d) Grantor, for itself and its successors and assigns, hereby agrees to warrant and forever defend, all and singular, all of the Property and property interests granted and conveyed pursuant to this Deed of Trust, against every person whomsoever lawfully claiming, or to claim, the same or any part thereof;

The representations, warranties and covenants contained in this Section shall survive foreclosure of this Deed of Trust, and shall inure to the benefit of Beneficiary.

3.2 Due Authorization. If Grantor is other than a natural person, then each individual who executes this document on behalf of Grantor represents and warrants to Beneficiary that such execution has been duly authorized by all necessary corporate, partnership, limited liability company or other action on the part of Grantor. Grantor represents that Grantor has obtained all consents and approvals required in connection with the execution, delivery and performance of this Deed of Trust.

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3.3 Other Representations and Warranties. Grantor represents and warrants to Beneficiary as follows:

(a) Grantor is a limited liability company, duly organized, validly existing and in good standing under the laws of the State of Delaware. Grantor is duly authorized to transact business in and is in good standing under the laws of the State of Oregon;

(b) The execution, delivery and performance by Grantor of the Loan Documents are within Grantor’s power and authority and have been duly authorized by all necessary action;

(c) This Deed of Trust is, and each other Loan Document to which Grantor is a party will, when delivered hereunder, be valid and binding obligations of Grantor enforceable against Grantor in accordance with their respective terms, except as limited by equitable principles and bankruptcy, insolvency and similar laws affecting creditors’ rights;

(d) The execution, delivery and performance by Grantor of the Loan Documents will not contravene any contractual or other restriction binding on or affecting Grantor and will not result in or require the creation of any lien, security interest, other charge or encumbrance (other than pursuant hereto) upon or with respect to any of its properties;

(e) The execution, delivery and performance by Grantor of the Loan Documents does not contravene any applicable law;

(f) No authorization, approval, consent or other action by, and no notice to or filing with, any court, governmental authority or regulatory body is required for the due execution, delivery and performance by Grantor of any of the Loan Documents or the effectiveness of any assignment of any of Grantor’s rights and interests of any kind to Beneficiary;

(g) No part of the Property, Chattels, or Intangible Personalty is in the hands of a receiver, no application for a receiver is pending with respect to any portion of the Property, Chattels, or Intangible Personalty, and no part of the Property, Chattels, or Intangible Personalty is subject to any foreclosure or similar proceeding;

(h) Grantor has not made any assignment for the benefit of creditors, nor has Grantor filed, or had filed against it, any petition in bankruptcy;

(i) There is no pending or, to the best of Grantor’s knowledge, threatened, litigation, action, proceeding or investigation, including, without limitation, any condemnation proceeding, against Grantor or the Property before any court, governmental or quasi-governmental, arbitrator or other authority;

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(j) Grantor is a “non-foreign person” within the meaning of Sections 1445 and 7701 of the United States Internal Revenue Code of 1986, as amended, and the regulations issued thereunder;

(k) Except as otherwise disclosed by the survey made available by Grantor to Beneficiary, access to and egress from the Property are available and provided by public streets, and Grantor has no knowledge of any federal, state, county, municipal or other governmental plans to change the highway or road system in the vicinity of the Property or to restrict or change access from any such highway or road to the Property;

(l) All public utility services necessary for the operation of all improvements constituting part of the Property for their intended purposes are available at the boundaries of the land constituting part of the Property, including water supply, storm and sanitary sewer facilities, and natural gas, electric, telephone and cable television facilities;

(m) Except as otherwise disclosed to Beneficiary in writing prior to the date hereof, and to the best of Grantor’s knowledge, the Property is located in a zoning district that permits the development, use and operation of the Property as it is currently operated as a permitted, and not as a non-conforming use. Except as otherwise disclosed to Beneficiary in writing prior to the date hereof, and to the best of Grantor’s knowledge, the Property complies in all respects with all zoning ordinances, regulations, requirements, conditions and restrictions, including but not limited to deed restrictions and restrictive covenants, applicable to the Property;

(n) Except as otherwise disclosed to Beneficiary in writing prior to the date hereof, and to the best of Grantor’s knowledge, there are no special or other assessments for public improvements or otherwise now affecting the Property, nor does Grantor know of any pending or threatened special assessments affecting the Property or any contemplated improvements affecting the Property that may result in special assessments. Except for the tax exceptions set forth in the lease to Oregon Health & Science University, a qualifying tax-exempt organization under Oregon state law, there are no tax abatements or exceptions affecting the Property;

(o) Grantor has filed all tax returns it is required to have filed, and has paid all taxes as shown on such returns or on any assessment received pertaining to the Property;

(p) Grantor has not received any notice from any governmental body having jurisdiction over the Property as to any violation of any applicable law, or any notice from any insurance company or inspection or rating bureau setting forth any requirements as a condition to the continuation of any insurance coverage on or with respect to the Property or the continuation thereof at premium rates existing at present which have not been remedied or satisfied;

(q) Grantor is not in default, in any manner which would adversely affect its properties, assets, operations or condition (financial or otherwise), in the performance, observance or fulfillment of any of the obligations, covenants or conditions set forth in any agreement or instrument to which it is a party or by which it or any of its properties, assets or revenues are bound;

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(r) Except as set forth in the Lease Certificate, there are no occupancy rights (written or oral), Leases or tenancies presently affecting any part of the Property. The Lease Certificate contains a true and correct description of all Leases presently affecting the Property. No written or oral agreements or understandings exist between Grantor and the tenants under the Leases described in the Lease Certificate that grant such tenants any rights greater than those described in the Lease Certificate or that are in any way inconsistent with the rights described in the Lease Certificate;

(s) There are no options, purchase contracts or other similar agreements of any type (written or oral) presently affecting any part of the Property;

(t) Except as otherwise disclosed to Beneficiary in writing prior to the date hereof, there exists no brokerage agreement with respect to any part of the Property;

(u) Except as otherwise disclosed to Beneficiary in writing prior to the date hereof, (i) there are no contracts presently affecting the Property (“Contracts”) having a term in excess of one hundred eighty (180) days or not terminable by Grantor (without penalty) on thirty (30) days’ notice; (ii) Grantor has heretofore delivered to Beneficiary true and correct copies of each of the Contracts together with all amendments thereto; (iii) Grantor is not in default of any obligations under any of the Contracts; and (iv) the Contracts represent the complete agreement between Grantor and such other parties as to the services to be performed or materials to be provided thereunder and the compensation to be paid for such services or materials, as applicable, and except as otherwise disclosed herein, such other parties possess no unsatisfied claims against Grantor. Grantor is not in default under any of the Contracts and no event has occurred which, with the passing of time or the giving of notice, or both, would constitute a default under any of the Contracts;

(v) To the best of Grantor’s knowledge, Grantor has obtained all Permits necessary for the operation, use, ownership, development, occupancy and maintenance of the Property as an office complex, as it is currently being operated. To the best of Grantor’s knowledge, none of the Permits has been suspended or revoked, and all of the Permits are in full force and effect, are fully paid for, and Grantor has made or will make application for renewals of any of the Permits prior to the expiration thereof;

(w) All insurance policies held by Grantor relating to or affecting the Property are in full force and effect and shall remain in full force and effect until all Secured Obligations are satisfied. Grantor has not received any notice of default or notice terminating or threatening to terminate any such insurance policies. Grantor has made or will make application for renewals of any of such insurance policies prior to the expiration thereof;

(x) Grantor either currently complies with or is not subject to ERISA. Neither the making of the Loan nor the exercise by Beneficiary of any of its rights under the Loan Documents constitutes or will constitute a non-exempt, prohibited transaction under ERISA;

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(y) Grantor’s exact legal name is correctly set out in the introductory paragraph of this Deed of Trust. Grantor’s organizational identification number is correctly set forth in the definition of “Grantor” set forth in Article 1 hereof. Grantor’s location (as such term is used in Section 5.8 hereof) is the State of Delaware;

(z) to the best of Grantor’s knowledge, except as disclosed in the Environmental Assessment, Hazardous Substances have not at any time been generated, used, treated or stored on, or transported to or from the Property in any quantity or manner which violates any Environmental Law;

(aa) to the best of Grantor’s knowledge, except as disclosed in the Environmental Assessment, Hazardous Substances have not at any time been Released (hereinafter defined) or disposed of on the Property in any quantity or manner which violates any Environmental Law;

(bb) to the best of Grantor’s knowledge, except as disclosed in the Environmental Assessment, Grantor is in compliance with all applicable Environmental Laws with respect to the Property and the requirements of any permits issued under such Environmental Laws with respect to the Property;

(cc) to the best of Grantor’s knowledge, there are no past, pending or threatened Environmental Claims against Grantor or the Property;

(dd) to the best of Grantor’s knowledge, except as disclosed in the Environmental Assessment, there is no condition or occurrence at the Property that could reasonably be anticipated (i) to form the basis of any Environmental Claim against Grantor or the Property, or (ii) to cause the Property to be subject to any restrictions on the ownership, occupancy, use or transferability thereof under any Environmental Law; and

(ee) to the best of Grantor’s knowledge, except as disclosed in the Environmental Assessment, there are not now and never have been any underground storage tanks located on the Property.

3.4 Continuing Effect. Grantor shall be liable to Beneficiary for any damage suffered by Beneficiary if any of the foregoing representations are inaccurate as of the date hereof, regardless when such inaccuracy may be discovered by, or result in harm to, Beneficiary. Grantor further represents and warrants that the foregoing representations and warranties, as well as all other representations and warranties of Grantor to Beneficiary relative to the Loan Documents, shall survive termination of this Deed of Trust.

Article 4

GRANTOR’S AFFIRMATIVE COVENANTS

4.1 Payment of Note. Grantor will pay all principal, interest, and other sums payable under the Note, on the date when such payments are due, without notice or demand.

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4.2 Performance of Other Obligations. Grantor will promptly and strictly perform and comply with all other covenants, conditions, and prohibitions required of Grantor by the terms of the Loan Documents.

4.3 Other Encumbrances. Grantor will promptly and strictly perform and comply with all covenants, conditions, and prohibitions required of Grantor in connection with any other encumbrance affecting the Property, the Chattels, or the Intangible Personalty, or any part thereof, or any interest therein, regardless of whether such other encumbrance is superior or subordinate to the lien hereof.

4.4 Payment of Taxes.

(a) Property Taxes . Unless Grantor is depositing money into reserves pursuant to Section 4.4(b), Grantor will (i) pay, before delinquency, all taxes and assessments, general or special, which may be levied or imposed at any time against Grantor’s interest and estate in the Property, the Chattels, or the Intangible Personalty, and (ii) within ten days after each payment of any such tax or assessment, Grantor will deliver to Beneficiary, without notice or demand, an official receipt for such payment. At Beneficiary’s option, Beneficiary may retain the services of a firm to monitor the payment of all taxes and assessments relating to the Property, the cost of which shall be borne by Grantor.

(b) Deposit for Taxes . On or before the date hereof, Grantor shall deposit with Beneficiary an amount equal to 1/12th of the amount which Beneficiary estimates will be required to make the next annual payment of taxes, assessments, and similar governmental charges referred to in this Section (collectively, the “Tax Reserves”), multiplied by the number of whole or partial months that have elapsed since the date one month prior to the most recent due date for such taxes, assessments and similar governmental charges. Thereafter, with each monthly payment under the Note, Grantor shall deposit with Beneficiary an amount equal to 1/12th of the amount which Beneficiary estimates will be required to pay the next annual payment of taxes, assessments, and similar governmental charges referred to in this Section. The purpose of these provisions is to provide Beneficiary with sufficient funds on hand to pay all such taxes, assessments, and other governmental charges thirty (30) days before the date on which they become past due. If the Beneficiary, in its sole discretion, determines that the funds reserved hereunder are, or will be, insufficient, Grantor shall upon demand pay such additional sums as Beneficiary shall determine necessary and shall pay any increased monthly charges requested by Beneficiary. Provided no Event of Default exists hereunder, Beneficiary will apply the amounts so deposited to the payment of such taxes, assessments, and other charges when due, but in no event will Beneficiary be liable for any interest on any amount so deposited, and any amount so deposited may be held and commingled with Beneficiary’s own funds. Notwithstanding anything to the contrary in this Section 4.4(b), the initial Grantor named herein shall only be required to deposit Tax Reserves with Beneficiary following the occurrence and during the continuance of any Event of Default.

(c) Intangible Taxes . If by reason of any statutory or constitutional amendment or judicial decision adopted or rendered after the date hereof, any tax, assessment, or similar charge is imposed against the Note, against Beneficiary, or against any interest of Beneficiary in any real or personal property encumbered hereby, Grantor will pay such tax,

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assessment, or other charge before delinquency and will indemnify Beneficiary against all loss, expense, or diminution of income in connection therewith. In the event Grantor is unable to do so, either for economic reasons or because the legal provisions or decisions creating such tax, assessment or charge forbid Grantor from doing so, then the Note will, at Beneficiary’s option, become due and payable in full upon thirty (30) days’ notice to Grantor.

(d) Right to Contest . Notwithstanding any other provision of this Section, Grantor will not be deemed to be in default solely by reason of Grantor’s failure to pay any tax, assessment or similar governmental charge so long as, in Beneficiary’s judgment, each of the following conditions is satisfied:

(i) Grantor is engaged in and diligently pursuing in good faith administrative or judicial proceedings appropriate to contest the validity or amount of such tax, assessment, or charge; and

(ii) Grantor’s payment of such tax, assessment, or charge would necessarily and materially prejudice Grantor’s prospects for success in such proceedings; and

(iii) Nonpayment of such tax, assessment, or charge will not result in the loss or forfeiture of any property encumbered hereby or any interest of Beneficiary therein; and

(iv) Grantor deposits with Beneficiary, as security for such payment which may ultimately be required, a sum equal to the amount of the disputed tax, assessment or charge plus the interest, penalties, advertising charges, and other costs which Beneficiary estimates are likely to become payable if Grantor’s contest is unsuccessful.

If Beneficiary determines that any one or more of such conditions is not satisfied or is no longer satisfied, Grantor will pay the tax, assessment, or charge in question, together with any interest and penalties thereon, within fifteen (15) days after Beneficiary gives notice of such determination.

4.5 Maintenance of Insurance.

(a) Coverages Required . Grantor shall maintain or cause to be maintained, with financially sound and reputable insurance companies or associations satisfactory to Beneficiary, all insurance required under the terms of the Insurance Agreement, and shall comply with each and every covenant and agreement contained in the Insurance Agreement. In addition, unless otherwise approved by Beneficiary, Grantor shall maintain or cause to be maintained, with financially sound and reputable insurance companies or associations satisfactory to Beneficiary, the same environmental insurance coverages, with Beneficiary named as an additional insured, as are in effect as of the date of this Deed of Trust.

WARNING

Unless you provide us with evidence of insurance coverage as required by our contract or loan agreement, we may purchase

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insurance at your expense to protect our interest, following written notice to you. This insurance may, but need not, also protect your interest. If the collateral becomes damaged, the coverage we purchase may not pay any claim you make or any claim made against you. You may later cancel this coverage by providing evidence that you have obtained property coverage elsewhere.

You are responsible for the cost of any insurance purchased by us. The cost of this insurance may be added to your contract or loan balance. If the cost is added to your contract or loan balance, the interest rate on the underlying contract or loan will apply to this added amount. The effective date of coverage may be the date your coverage lapsed or the date you failed to provide proof of coverage.

The coverage we purchase may be considerably more expensive than insurance you can obtain on your own and may not satisfy the need for property damage coverage or any mandatory liability insurance imposed by applicable law.

(b) Renewal Policies . Not less than thirty (30) days prior to the expiration date of each insurance policy required pursuant to the Insurance Agreement, Grantor will deliver to Beneficiary an appropriate renewal policy (or a certified copy thereof), together with evidence satisfactory to Beneficiary that the applicable premium has been prepaid.

(c) Deposit for Premiums . On or before the date hereof, Grantor shall deposit with Beneficiary an amount equal to 1/12th of the amount which Beneficiary estimates will be required to make the next annual payments of the premiums for the policies of insurance referred to in this Section (the “Insurance Reserves”), multiplied by the number of whole and partial months which have elapsed since the date one month prior to the most recent policy anniversary date for each such policy. Thereafter, with each monthly payment under the Note, Grantor will deposit an amount equal to 1/12th of the amount which Beneficiary estimates will be required to pay the next required annual premium for each insurance policy referred to in this Section. The purpose of these provisions is to provide Beneficiary with sufficient funds on hand to pay all such premiums thirty (30) days before the date on which they become past due. If Beneficiary, in its sole discretion, determines that the funds reserved hereunder are, or will be, insufficient, Grantor shall upon demand pay such additional sums as Beneficiary shall determine necessary and shall pay any increased monthly charges requested by Beneficiary. Provided no Event of Default exists hereunder, Beneficiary will apply the amounts so deposited to the payment of such insurance premiums when due, but in no event will Beneficiary be liable for any interest on any amounts so deposited, and the money so received may be held and commingled with Beneficiary’s own funds. Notwithstanding anything to the contrary in this Section 4.5(c), the initial Grantor named herein shall only be required to deposit Insurance Reserves with Beneficiary following the occurrence and during the continuance of any Event of Default.

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(d) Application of Hazard Insurance Proceeds . Grantor shall promptly notify Beneficiary of any damage or casualty to all or any portion of the Property or Chattels. Beneficiary may participate in all negotiations and appear and participate in all judicial arbitration proceedings concerning any insurance proceeds which may be payable as a result of such casualty or damage, and may, in Beneficiary’s sole discretion, compromise or settle, in the name of Beneficiary, Grantor, or both any claim for any such insurance proceeds. Any such insurance proceeds shall be paid to Beneficiary and shall be applied first to reimburse Beneficiary for all costs and expenses, including attorneys’ fees, incurred by Beneficiary in connection with the collection of such insurance proceeds. The balance of any insurance proceeds received by Beneficiary with respect to an insured casualty may, in Beneficiary’s sole discretion, either (i) be retained and applied by Beneficiary toward payment of the Secured Obligations, or (ii) be paid over, in whole or in part and subject to such conditions as Beneficiary may impose, to Grantor to pay for repairs or replacements necessitated by the casualty; provided, however, that if all of the Secured Obligations have been performed or are discharged by the application of less than all of such insurance proceeds, then any remaining proceeds will be paid over to Grantor. Notwithstanding the preceding sentence, if (A) no Default or Event of Default shall exist hereunder, and (B) the proceeds received by Beneficiary (together with any other funds delivered by Grantor to Beneficiary for such purpose) shall be sufficient, in Beneficiary’s reasonable judgment, to pay for any restoration necessitated by the casualty, and (C) the cost of such restoration shall not exceed $100,000.00, and (D) such restoration can be completed, in Beneficiary’s judgment, at least ninety (90) days prior to the maturity date of the Note, then Beneficiary shall apply such proceeds as provided in clause (ii) of the preceding sentence. Beneficiary will have no obligation to see to the proper application of any insurance proceeds paid over to Grantor, nor will any such proceeds received by Beneficiary bear interest or be subject to any other charge for the benefit of Grantor. Beneficiary may, prior to the application of insurance proceeds, commingle them with Beneficiary’s own funds and otherwise act with regard to such proceeds as Beneficiary may determine in Beneficiary’s sole discretion.

(e) Successor’s Rights . Any person who acquires title to the Property or the Chattels upon foreclosure hereunder will succeed to all of Grantor’s rights under all policies of insurance maintained pursuant to this Section.

4.6 Maintenance and Repair of Property and Chattels. Grantor will at all times maintain the Property and the Chattels in good condition and repair, will diligently prosecute the completion of any building or other improvement which is at any time in the process of construction on the Property, and will promptly repair, restore, replace, or rebuild any part of the Property or the Chattels which may be affected by any casualty or any public or private taking or injury to the Property or the Chattels. All costs and expenses arising out of the foregoing shall be paid by Grantor whether or not the proceeds of any insurance or eminent domain shall be sufficient therefor. Grantor will comply with all statutes, ordinances, and other governmental or quasi-governmental requirements and private covenants relating to the ownership, construction, use, or operation of the Property, including but not limited to any environmental or ecological requirements; provided, that so long as Grantor is not otherwise in default hereunder, Grantor may, upon providing Beneficiary with security reasonably satisfactory to Beneficiary, proceed diligently and in good faith to contest the validity or applicability of any such statute, ordinance, or requirement. Beneficiary and any person authorized by Beneficiary may enter and inspect the Property at all reasonable times, and may inspect the Chattels, wherever located, at all reasonable times.

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4.7 Leases. Grantor shall timely pay and perform each of its obligations under or in connection with the Leases, and shall otherwise pay such sums and take such action as shall be necessary or required in order to maintain each of the Leases in full force and effect in accordance with its terms. Grantor shall make reasonable efforts to promptly furnish to Beneficiary copies of any notices given to Grantor by the lessee under any Lease, alleging the default by Grantor in the timely payment or performance of its obligations under such Lease and any subsequent communication related thereto. Grantor shall also promptly furnish to Beneficiary copies of any notices given to Grantor by the lessee under any Lease, extending the term of any Lease, requiring or demanding the expenditure of any sum by Grantor (or demanding the taking of any action by Grantor), or relating to any other material obligation of Grantor under such Lease and any subsequent communication related thereto. Grantor agrees that Beneficiary, in its sole discretion, may advance any sum or take any action which Beneficiary believes is necessary or required to maintain the Leases in full force and effect, and all such sums advanced by Beneficiary, together with all costs and expenses incurred by Beneficiary in connection with action taken by Beneficiary pursuant to this Section, shall be due and payable by Grantor to Beneficiary upon demand, shall bear interest until paid at the Default Rate (as defined in the Note), and shall be secured by this Deed of Trust.

4.8 Eminent Domain; Private Damage. If all or any part of the Property is taken or damaged by eminent domain or any other public or private action, Grantor will notify Beneficiary promptly of the time and place of all meetings, hearings, trials, and other proceedings relating to such action. Beneficiary may participate in all negotiations and appear and participate in all judicial or arbitration proceedings concerning any award or payment which may be due as a result of such taking or damage, and may, in Beneficiary’s reasonable discretion, compromise or settle, in the names of both Grantor and Beneficiary, any claim for any such award or payment. Any such award or payment is to be paid to Beneficiary and will be applied first to reimburse Beneficiary for all costs and expenses, including attorneys’ fees, incurred by Beneficiary in connection with the ascertainment and collection of such award or payment. The balance, if any, of such award or payment may, in Beneficiary’s sole discretion, either (a) be retained by Beneficiary and applied toward the Secured Obligations, or (b) be paid over, in whole or in part and subject to such conditions as Beneficiary may impose, to Grantor for the purpose of restoring, repairing, or rebuilding any part of the Property affected by the taking or damage. Notwithstanding the preceding sentence, if (i) no Default or Event of Default shall have occurred and be continuing hereunder, and (ii) the proceeds received by Beneficiary (together with any other funds delivered by Grantor to Beneficiary for such purpose) shall be sufficient, in Beneficiary’s reasonable judgment, to pay for any restoration necessitated by the taking or damage, and (iii) the cost of such restoration shall not exceed $100,000.00, and (iv) such restoration can be completed, in Beneficiary’s judgment, at least ninety (90) days prior to the maturity date of the Note, and (v) the remaining Property shall constitute, in Beneficiary’s sole judgment, adequate security for the Secured Obligations, then Beneficiary shall apply such proceeds as provided in clause (b) of the preceding sentence. Grantor’s duty to pay the Note in accordance with its terms and to perform the other Secured Obligations will not be suspended by the pendency or discharged by the conclusion of any proceedings for the collection of any such award or payment, and any reduction in the Secured Obligations resulting from Beneficiary’s

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application of any such award or payment will take effect only when Beneficiary receives such award or payment. If this Deed of Trust has been foreclosed prior to Beneficiary’s receipt of such award or payment, Beneficiary may nonetheless retain such award or payment to the extent required to reimburse Beneficiary for all costs and expenses, including attorneys’ fees, incurred in connection therewith, and to discharge any deficiency remaining with respect to the Secured Obligations.

4.9 Mechanics’ Liens. Grantor will keep the Property free and clear of all liens and claims of liens by contractors, subcontractors, mechanics, laborers, materialmen, and other such persons, and will cause any recorded statement of any such lien to be released of record within thirty (30) days after the recording thereof or such earlier date as may be necessary to stop a foreclosure thereof. Notwithstanding the preceding sentence, however, Grantor will not be deemed to be in default under this Section if (i) the aggregate amount of any asserted liens does not exceed $100,000.00, or (ii) to the extent such liens exceed $100,000.00, Grantor provides Beneficiary with such security as Beneficiary may require to protect Beneficiary against all loss, damage and expense which Beneficiary may incur as a result of such liens in excess of $100,000.00, which security may consist of Grantor causing such liens in excess of $100,000.00 to be bonded over or insured over. Any initiation of proceedings to foreclose on any such lien, however, shall constitute a Default.

4.10 Defense of Actions. Grantor will defend, at Grantor’s expense, any action, proceeding or claim which affects any property encumbered hereby or any interest of Beneficiary in such property or in the Secured Obligations, and will indemnify and hold Beneficiary harmless from all loss, damage, cost, or expense, including attorneys’ fees, which Beneficiary may incur in connection therewith.

4.11 Expenses of Enforcement. Grantor will pay all costs and expenses, including attorneys’ fees, which Beneficiary may incur in connection with any effort or action (whether or not litigation or foreclosure is involved) to enforce or defend Beneficiary’s rights and remedies under any of the Loan Documents, including but not limited to all attorneys’ fees, appraisal fees, consultants’ fees, and other expenses incurred by Beneficiary in securing title to or possession of, and realizing upon, any security for the Secured Obligations. All such costs and expenses (together with interest thereon at the Default Rate from the date incurred) shall constitute part of the Secured Obligations, and may be included in the computation of the amount owed to Beneficiary for purposes of foreclosing or otherwise enforcing this Deed of Trust.

4.12 Financial Reports. During the term of the Loan, Grantor shall supply to Beneficiary (a) within forty-five (45) days following the end of each quarter, Grantor’s quarterly and annual operating statements for the Property as of the end of and for the preceding quarter and fiscal year, as applicable, in each case prepared consistent with the form of operating statements delivered to Beneficiary by Grantor prior to the date of this Deed of Trust; (b) contemporaneously with Grantor’s delivery of each of such operating statements, a certified rent roll signed and dated by Grantor in the form delivered to Beneficiary prior to the date of this Deed of Trust; and (c) within ninety (90) days following the end of each year, an annual balance sheet and profit and loss statement of Grantor. The financial statements and reports described in (a) and (c) above shall be in the detail set forth in the financial statements delivered to Beneficiary by Grantor prior to the date of this Deed of Trust, shall be prepared in accordance

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with generally accepted accounting principles consistently applied, and shall be certified as true and correct by Grantor (or, if required by Beneficiary during the continuation of an Event of Default or if required to comply with regulatory requirements to which Beneficiary may be subject, by an independent certified public accountant acceptable to Beneficiary). Grantor shall also furnish to Beneficiary within forty-five (45) days of Beneficiary’s request, any other financial reports or statements of Grantor as Beneficiary may reasonably request to comply with regulatory requirements to which Beneficiary may be subject, or as requested by Beneficiary in its sole discretion during the continuation of an Event of Default. Upon Beneficiary’s demand after any Event of Default, or if Beneficiary securitizes the Loan, Grantor shall supply to Beneficiary the items required in (a) and (b) above on a monthly basis. Notwithstanding the foregoing, for so long as KBS ADP Plaza, LLC is Grantor, any request or requirement that Grantor deliver audited financials certified by an independent certified public accountant may be satisfied by delivery of the audited financials for KBS Real Estate Investment Trust, Inc.

4.13 Priority of Leases. To the extent Grantor has the right, under the terms of any Lease, to make such Lease subordinate to the lien hereof, Grantor will, at Beneficiary’s request and Grantor’s expense, take such action as may be required to effect such subordination. Conversely, Grantor will, at Beneficiary’s request and Grantor’s expense, take such action as may be necessary to subordinate the lien hereof to any future Lease designated by Beneficiary.

4.14 Inventories; Assembly of Chattels. Upon the occurrence of any Event of Default hereunder, Grantor will at Beneficiary’s request assemble the Chattels and make them available to Beneficiary at any place designated by Beneficiary which is reasonably convenient to both parties.

4.15 Compliance with Laws, Etc. Grantor shall comply in all material respects with all applicable laws, rules, regulations and orders, such compliance to include, without limitation, maintaining all Permits and paying before the same become delinquent all taxes, assessments and governmental charges imposed upon Grantor or the Property.

4.16 Records and Books of Account. Grantor shall keep accurate and complete records and books of account, in which complete entries will be made in accordance with generally accepted accounting principles consistently applied, reflecting all financial transactions relating to the Property.

4.17 Inspection Rights. At any reasonable time, and from time to time, Grantor shall permit Beneficiary, or any agents or representatives thereof, to examine and make copies of and abstracts from the records and books of account of Grantor, and to visit the Property and to discuss with Grantor the affairs, finances and accounts of Grantor.

4.18 Change of Grantor’s Address or State of Organization. Grantor shall promptly notify Beneficiary if changes are made in Grantor’s address from that set forth in Section 9.10 hereof, or if Grantor shall either change its “location” (as such term is used in Section 5.8 hereof), its state of organization or if Grantor shall organize in any state other than the State of Delaware.

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4.19 Further Assurances; Estoppel Certificates. Grantor will execute and deliver to Beneficiary upon demand, and pay the costs of preparation and recording thereof, any further documents which Beneficiary may request to confirm or perfect the liens and security interests created or intended to be created hereby, or to confirm or perfect any evidence of the Secured Obligations. Grantor will also, within ten days after any request by Beneficiary, deliver to Beneficiary a signed and acknowledged statement certifying to Beneficiary, or to any proposed transferee of the Secured Obligations, (a) the balance of principal, interest, and other sums then outstanding under the Note, and (b) whether Grantor claims to have any offsets or defenses with respect to the Secured Obligations and, if so, the nature of such offsets or defenses.

4.20 Costs of Closing. Grantor shall on demand pay directly or reimburse Beneficiary for any actual costs or expenses pertaining to the closing of the Loan, including, but not limited to, fees of counsel for Beneficiary, costs and expenses for which invoices were not available at the closing of the Loan, or costs and expenses which are incurred by Beneficiary after such closing, including, without limitation, costs or expenses incurred to obtain originals or copies of recorded or filed Loan Documents and UCC financing statements. All such costs and expenses (together with interest thereon at the Default Rate from the date incurred by Beneficiary) shall constitute a part of the Secured Obligations, and may be included in the computation of the amount owed to Beneficiary for purposes of foreclosing or otherwise enforcing this Deed of Trust.

4.21 Fund for Electronic Transfer. All monthly payments of principal and interest on the Note, and escrow deposits, if any, under this Deed of Trust, shall be made by Grantor by electronic funds transfer from a bank account established and maintained by Grantor for such purpose. Grantor shall establish and maintain such an account until the Note is fully paid and shall direct the depository of such account in writing to so transmit such payments on or before the respective due dates to the account of Beneficiary as shall be designated by Beneficiary in writing.

4.22 Use. Grantor shall use the Property solely for the operation of an office complex, and for no other use or purpose.

4.23 Management. The Property shall be managed by CB Richard Ellis (“Property Manager”)