The three-story granite and red brick Second Empire style building which occupies a central location on the grounds of the former Coast Guard Station at the foot of Bay Street, St. George, Staten Island, has had a long and distinguished history of government service; first as the main office of the Lighthouse Service Depot for the Third Lighthouse District, and later as the Administration Building when the compound became a United States Coast Guard Base. This building is expressive of the era when, under the direction of Alfred B. Mullett, Supervising Architect of the Treasury Department for nine years from 1865 to 1874, many important and impressive buildings were built by the federal government.