US General Accounting Office Building
U.S. National Register of Historic Places
U.S. Government Accountability Office Building in 2023
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Location	441 G Street NWWashington, D.C.
Coordinates	38°53′54.24″N77°1′3″W / 38.8984000°N 77.01750°W /38.8984000; -77.01750
Area	5 acres (2.0 ha)
Built	1951
Architectural style	Modern
NRHP reference No.	95001086[1]
Added to NRHP	September 21, 1995

TheU.S. Government Accountability Office Building (theGAO Building -- formerly known as theGeneral Accounting Office Building) is a historic government office building mainly serving as the headquarters of theGovernment Accountability Office, a legislative branch agency that providesauditing,evaluative, and investigative services for theUnited States Congress in an independent and nonpartisan capacity.^[2] Unlike most other federal government buildings it is directly owned and operated by the agency itself and is managed byEMCOR Government Services (Emcor / EMCOR Group) through agovernment contract, rather than theGeneral Services Administration in order the prevent a conflict of interest with the executive branch agencies they audit; unlike other legislative branch agencies it is not operated by theArchitect of the Capitol which manages the physical infrastructure for core buildings that are part of theUnited States Capitol Complex.^{[3][4][5][6][7][8][9][10][11]}

It is located at 441 G Street NW inWashington, D.C. 20226 in theJudiciary Square neighborhood, the building is adjacent to theNational Building Museum.^[3][4][5][6]

Unique in its "block style" design, federal office buildings before centralair conditioning were designed with interior courtyards and wings, to allow for maximum ventilation and light. While the initial 1941 design utilized a "fish bone" style, with a central spine and interior courtyards,WWII placed the project on hold while technology advanced.

In 1946, an updated, novel "solid building" design made headlines. Untested, planning officials wondered whether such a structure would prove claustrophobic for employees.^[12] It was dedicated on September 11, 1951, by PresidentHarry S. Truman.^[13] The building also serves as headquarters forU.S. Army Corps of Engineers.

• National Register of Historic Places listings in central Washington, D.C.

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