1789 Massachusetts Avenue, NW - Renovation and Restoration
Location: 1789 Massachusetts Avenue, N.W., Washington, DC
Owner:American Enterprise Institute
Contract Amount:$78.4 million
Date of Completion:August 2016
Grunley renovated and restored 1789 Massachusetts Avenue, NW, Washington, DC to serve as the new headquarters building of the American Enterprise Institute. Located in Dupont Circle, the building is a National Historic Landmark constructed in 1917. The renovation of this five-story historic property involved the excavation, underpinning and construction of a new level below the existing basement. A new central core structure was constructed up through the building and the existing steel frame was reinforced to accommodate a new penthouse level. New mechanical and electrical systems were installed in the existing historic spaces. The façade underwent a complete restoration of the highly detailed limestone work.