First Potomac Realty Trust Achieves 50% Occupancy at 2000 Enterprise Parkway in Hampton, Va.

BETHESDA, Md. -- First Potomac Realty Trust (NYSE: FPO) announced it has signed a long-term lease with Guardian Services Group for 135,000 square feet at 2000 Enterprise Parkway in Hampton, Virginia. The lease, which commenced yesterday, brings the 412,000-square-foot property to 50% leased and occupied. The property was purchased vacant by First Potomac in September 2005 and had been vacant from 2002 until June of this year.

Guardian Services Group is a full-service logistics company founded in 1946 and is currently the largest military non-temporary storage contractor in the Baltimore/Washington area, with approximately 20 million pounds of household effects in storage.

Skip Dawson, First Potomac's Chief Operating Officer, stated, "With Guardian taking immediate occupancy, we are now at 50% leased and occupied with several active prospects for the remaining space. The configuration of this high-bay space, the ability to offer 360-degree access and a tightening market for large, available space enabled us to meet Guardian's needs on an incredibly short timeframe. We look forward to working closely with them as they grow."

Leasing Information

Businesses interested in learning more about leasing opportunities at 2000 Enterprise Parkway should contact Tony Beck of First Potomac Realty Trust at [phone].

2000 Enterprise Parkway is situated on 37 acres and was built in 1996 with a strong systems infrastructure. It is conveniently located in Hampton Roads Center South with excellent access to I-64. 2000 Enterprise Parkway is one of 21 buildings First Potomac owns in the greater Norfolk market, representing approximately 3.4 million square feet.

About First Potomac Realty Trust

First Potomac Realty Trust is a self-administered, self-managed real estate investment trust that focuses on owning and operating industrial properties and business parks in the Washington, D.C. metropolitan area and other major markets in Virginia and Maryland. The Company's portfolio totals approximately 11.4 million square feet. The Company's largest tenant is the U.S. Government.

First Potomac's press releases are available at www.first-potomac.com or by contacting the Company at 301-986-9200.

Forward Looking Statements

The forward-looking statements contained in this press release are subject to various risks and uncertainties. Although the Company believes the expectations reflected in such forward-looking statements are based on reasonable assumptions, there can be no assurance that its expectations will be achieved. Certain factors that could cause actual results to differ materially from the Company's expectations include changes in general or regional economic conditions; the Company's ability to timely lease or re-lease space at current or anticipated rents; changes in interest rates; changes in operating costs; the Company's ability to complete acquisitions on acceptable terms; and other risks detailed in the Company's Annual Report on Form 10-K and described from time to time in the Company's filings with the SEC. Many of these factors are beyond the Company's ability to control or predict. Forward-looking statements are not guarantees of performance. For forward-looking statements herein, the Company claims the protection of the safe harbor for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995. The Company assumes no obligation to update or supplement forward-looking statements that become untrue because of subsequent events.