"More than ten years ago then-Secretary of Homeland Security Michael Chertoff first proposed building a consolidated headquarters for the Department of Homeland Security at St. Elizabeths. Congress first appropriated funding for St. Elizabeths in 2006, with construction beginning in 2009. Builders have made substantial progress constructing the consolidated headquarters. In 2013, for example, the Coast Guard moved into its new headquarters at St. Elizabeths. Renovations of the 'Center Building,' which will house the Secretary and other key leadership staff are well underway and will be ready for occupancy in 2018. Congress has also appropriated funding for necessary infrastructure improvements, an addition to the Center Building, and reconfiguration of the Coast Guard building to accommodate more staff."
Senate Committee on Homeland Security and Governmental Affairs: http://www.hsgac.senate.gov/