Corporate Office Properties Trust Names George B. Swintz, Vice President, Asset Management and Leasing.

COLUMBIA, Md. -- Corporate Office Properties Trust (NYSE:OFC) has named George B. Swintz, Vice President, Asset Management and Leasing for the Company's Colorado Springs portfolio. Colorado Springs is a new market for the Company based on its expansion strategy built around meeting the multi-location requirements of its existing strategic tenants. Mr. Swintz joins Corporate Office Properties from Grubb & Ellis|Quantum Commercial Group in Colorado Springs, CO, where he was Senior Broker Associate.

In his new position, Mr. Swintz will supervise all marketing, leasing and asset management functions for the Company's holdings in Colorado Springs, which is presently comprised of a 64 acre parcel of land known as Patriot Park and the development rights to build a two story, 50,000 square foot Class A office building on approximately 5 of the 64 acres within the park. The remaining 59 acres can be developed with over 600,000 square feet of office space. His responsibilities also include identifying new acquisition opportunities and coordination of development projects.

Mr. Swintz brings with him 28 years of real estate experience in development, leasing and sales, build to suit construction, and consulting. His most recent efforts involve clients in the defense, high-tech and medical industries. As an active leasing and sales broker in the Colorado Springs market for over 25 years, his contacts reach deep into all segments of the economy. Mr. Swintz earned a Bachelor of Arts degree in Real Estate with a minor in Business Administration from the University of Minnesota. Mr. Swintz also possesses a CCIM designation. He has been a past Chairman of the Commercial Realtors Association in Colorado Springs and has received the coveted Commercial Realtor of the Year Award.

"George's extensive and varied background in many areas of real estate will make him extremely valuable in this key management position," stated Randall M. Griffin, President and Chief Executive Officer of Corporate Office Properties Trust. "His involvement with defense clients will be particularly useful given our tenant concentration in this sector. The Colorado Springs area represents an important growth market for the Company, and we are excited to add George's knowledge and professionalism to our management team to lead our future growth in this market," he added.

Company Information

Corporate Office Properties Trust (COPT) is a fully integrated, self-managed real estate investment trust (REIT) that focuses on the ownership, management, leasing, acquisition and development of suburban office properties primarily in select Mid-Atlantic submarkets. The Company is among the largest owners of suburban office properties in the Greater Washington, DC region. The Company currently owns 150 office properties totaling 12.5 million rentable square feet. The Company has implemented a core customer expansion strategy that is built around meeting, through acquisitions and development, the multi-location requirements of the Company's existing strategic tenants. The Company's property management services team provides comprehensive property and asset management to company owned properties and select third party clients. The Company's development and construction services team provides a wide range of development and construction management services for company owned properties, as well as land planning, design/build services, consulting, and merchant development to select third party clients. The Company's shares are traded on the New York Stock Exchange under the symbol OFC. More information on Corporate Office Properties Trust can be found on the Internet at www.copt.com.

Forward-Looking Information

This press release may contain "forward-looking" statements, as defined in Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934, that are based on the Company's current expectations, estimates and projections about future events and financial trends affecting the Company. Forward-looking statements can be identified by the use of words such as "may", "will", "should", "expect", "estimate" or other comparable terminology. Forward-looking statements are inherently subject to risks and uncertainties, many of which the Company cannot predict with accuracy and some of which the Company might not even anticipate. Accordingly, the Company can give no assurance that these expectations, estimates and projections will be achieved. Future events and actual results may differ materially from those discussed in the forward-looking statements.

Important factors that may affect these expectations, estimates, and projections include, but are not limited to:

--the Company's ability to borrow on favorable terms;

--general economic and business conditions, which will, among other things, affect office property demand and rents, tenant creditworthiness, interest rates and financing availability;

--adverse changes in the real estate markets including, among other things, increased competition with other companies;

--risk of real estate acquisition and development, including, among other things, risks that development projects may not be completed on schedule, that tenants may not take occupancy or pay rent or that development or operating costs may be greater than anticipated;

--risks of investing through joint venture structures, including risks that the Company's joint venture partners may not fulfill their financial obligations as investors or may take actions that are inconsistent with the Company's objectives;

--governmental actions and initiatives; and

--environmental requirements.

The Company undertakes no obligation to update or supplement any forward-looking statements. For further information, please refer to the Company's filings with the Securities and Exchange Commission, particularly the section entitled "Risk Factors" in Item 1 of the Company's Annual Report on Form 10-K for the year ended December 31, 2004.