Overlooking the Anacostia River and the capital’s monumental core, the 11-story project was commissioned by the U.S. General Services Administration.
HOK’s site design for the courtyards, edges and green roof provides continuity between the surrounding woodlands and the historic St. Elizabeths west campus. The layout of the courtyards, as with the building, steps down from east to west toward a low area of the campus. This progression along a 120-foot hillside provides a canvas for the landscape concept. The physiographic region transitions from the Blue Ridge and outcrop barrens of the Piedmont plateau region to the lowlands of the coastal plain.
The site’s exterior spaces are high-performance landscapes that provide ecological, aesthetic, programmatic and educational functions.
A green roof features 400,000 square feet of plants from the Blue Ridge, Northern Piedmont, Southeastern Plains and Middle Atlantic Coastal Plain areas. Rainwater that falls onto the green roof permeates through the plant roots and soil, is captured in the drainage system and travels down to the stormwater pond for reuse in irrigation.
Because this had been a contaminated site, large amounts of soil were removed and replaced with various custom soil blends.
1.2 million sq. ft. / 111,000 sq. m.
31 acres / 12 hectares
DBIA- Design Build Honor Award, Civic Building
NAIOP Maryland/ DC Chapter- Award of Excellence, Best Institutional Facility
NAIOP Maryland/ DC Chapter- Award of Excellence, Best Sustainable Project
Number of plug plants
Square feet of green roof sedum mats
Number of shrubs
Number of trees
11 June 2015
“American Society of Landscape Architects Tours U.S. Coast Guard Headquarters”
31 August 2014
“U.S. Coast Guard Headquarters, St. Elizabeths West Campus, Washington, United States, HOK”
7 October 2013
“Washington Business Journal on the New U.S. Coast Guard Headquarters”