The financial details of the transaction have not been disclosed. However, Trammell Crow--the real estate services firm that handles leasing at the property on behalf of owner Prudential Real Estate Investors--markets the space for $35.50 to $38 per sf. The lease, Trammell Crow tells GlobeSt.com, is for a five-year term.

The 10-story tower at 1800 M St. was developed in 1975 and renovated in 2002. Located in the city's central business district, the building sat empty for two years until Trammell Crow's Bob Hines, Scott Killie and Karen May turned things around, leaving the class B structure with a current occupancy level of 70%.

"GSA chose this space for its convenient, accessible CBD location; its wealth of amenities; and its large, efficient floorplates," says Terry Hindermann, director of brokerage services for Trammell Crow's Mid-Atlantic region.