Columbia Equity Trust, Inc. to Host Second Quarter 2006 Conference Call.

WASHINGTON -- Columbia Equity Trust, Inc. (NYSE:COE) announced today that it will release its second quarter 2006 earnings prior to the market open on Monday, August 14, 2006. A conference call will follow on Monday, August 14, 2006, at 2:00 P.M. Eastern Time. Shareholders and interested parties may access the call by dialing 800-510-9661 (access code 44696251). A hyperlink to the live webcast of this call will be available in the Investor Relations section of the Company's website at www.columbiareit.com. The webcast is also being distributed through the Thomson StreetEvents Network. Individual Investors can listen to the call at www.earnings.com. Institutional investors can access the call via Thomson StreetEvents at www.streetevents.com.

A replay will be available after the call from 4:00 P.M. Eastern Time on August 14, 2006 through August 21, 2006 by dialing 888-286-8010 (access code 66775312). During this period, an on-demand webcast replay will also be available from a hyperlink in the Investor Relations section of the Company's website.

In addition to information included in Columbia Equity Trust, Inc.'s August 14, 2006 earnings release, the Company will provide supplemental operating and financial data for the second quarter 2006. This supplemental data will be available under Quarterly Supplementals in the Investor Relations section of the Company's website when the second quarter 2006 earnings are released.

About Columbia Equity Trust, Inc.

Columbia is a self-advised, self-managed Maryland corporation focused on the acquisition, development, renovation, repositioning, ownership, management and operation of commercial office properties located predominantly in the Greater Washington, D.C. area. For additional information please visit our web site at http://www.columbiareit.com.

Forward Looking Statements

Certain statements in this release that are not historical fact may constitute forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Such forward-looking statements involve known and unknown risks, uncertainties and other factors which may cause the actual results of the Company to differ materially from historical results or from any results expressed or implied by such forward-looking statements, including without limitation: national and local economic, business, real estate and other market conditions; the competitive environment in which the Company operates; the execution of its business plan; financing risks; the Company's ability to maintain its status as a REIT for federal income tax purposes; acquisition and development risks; potential environmental and other liabilities; and other factors affecting the real estate industry generally or the office industry in particular. Although the Company believes the expectations reflected in any forward-looking statements are based on reasonable assumptions, it can give no assurance that its expectations will be attained. For a further discussion of these and other factors that could impact the Company's future results, performance, achievements or transactions, see the documents filed by the Company from time to time with the Securities and Exchange Commission, and in particular the section titled, "Risk Factors" in the Company's prospectus.