Congressional Office Buildings A map of the U.S. Capitol complex [112k] and an aerial photograph [50k] showing the locations of the congressional office buildings are available. Although several of these buildings were named long after their construction and occupancy, their present names are used here. U.S. House of Representatives Cannon House Office Building Location: Southeast of the Capitol on a site bounded by Independence Avenue, First Street, New Jersey Avenue, and C Street, S.E. Date Occupied: January 1908 Architect of the Capitol: Elliott Woods Area: 671,921 square feet Associate Architects: John Carrère and Thomas Hastings Longworth House Office Building Location: South of the Capitol on a site bounded by Independence Avenue, New Jersey Avenue, South Capitol Street, and C Street, S.E. Date Occupied: April 1933 Architect of the Capitol: David Lynn Area: 599,675 square feet Associate Architects: Allied Architects Rayburn House Office Building Location: Southwest of the Capitol on a site bounded by Independence Avenue, South Capitol Street, First Street, and C Street, S.W. Date Occupied: February 1965 Architect of the Capitol: J. George Stewart Area: 2,375,000 square feet Associate Architects: John Harbeson, William Hough, William Livingston, and Roy Larson Ford House Office Building Location: Southwest of the Capitol on a site bounded by Second Street, D Street, Third Street and Virginia Ave, S.W. Date Occupied: 1975 Built: 1939 as the first General Federal Office Building in Area: 585,532 s quare feet Washington. U.S. Senate Russell Senate Office Building Location: Northeast of the Capitol on a site bounded by Constitution Avenue, First Street, Delaware Avenue, and C Street, N.E. Date Occupied: March 1909 Architect of the Capitol: Elliott Woods Area: 658,250 square feet Associate Architects: John Carrère and Thomas Hastings Dirksen Senate Office Building Location: Northeast of the Capitol, adjoining the Hart Senate Office Building on a site bounded by Constitution Avenue, Second Street, First Street, and C Street, N.E. Date Occupied: October 1958 Architect of the Capitol: David Lynn Area: 712,910 square feet Associate Architects: Otto Eggers and Daniel Higgins Hart Senate Office Building Location: Northeast of the Capitol, adjoining the Dirksen Senate Office Building on a site bounded by Constitution Avenue, Second Street, First Street, and C Street, N.E. Date Occupied: November 1982 Architect of the Capitol: George M. White Area: 1,019,750 square feet Associate Architects: J. Carl Warnecke and A. Eugene Kohn .