City officials would not discuss where they planned to move the department, fearing it could raise the price of the property.

Charles L. Overby, chairman and CEO of Freedom Forum, praised the mayor for moving quickly, beating a self-imposed deadline to provide an answer within 45 days. The nonprofit foundation wanted to know quickly whether the property was available so it could avoid extending its current lease in neighboring Arlington. That lease doesn't expire until 2003. Real estate negotiations are known to drag on in Washington, however, which may have contributed to the eye-catching offer. The $100 million includes $75 million outright for the building, far more than its assessed value of $44 million. It also includes a $25 million donation for local affordable housing.

Freedom Forum plans to relocate its headquarters to 6th and Pennsylvania Ave. NW. It also wants to expand its museum on journalism, the Newseum, which has seen its total visitor count reach about 1.5 million.