You are required by law to obtain a permit for construction in the District of Columbia. Permits are applied for in the Permit Service Center, 941 North Capitol Street, NE, Room 2300. You need a permit for:
New construction and foundations
Additions, alterations, or repair of existing buildings
Razes (demolition)
Construction of a retaining wall, fence, shed, garage or vault
Erection of a sign and awning
Layout of interior space for tenants in new or existing commercial buildings