National

Land Trust Alliance
National Park Service
National Trust for Historic Preservation
Recent Past Preservation Network

Local
DC Historic Preservation Office
DC Preservation League
Capitol Hill Restoration Society
U.S. Commission of Fine Arts & Old Georgetown Board

Preservation Resources & Publications

Benjamin Moore
Interpreting the Standards (ITS) Bulletins
Preservation Books
Preservation Briefs
Preservation Tech Notes
The Secretary of the Interior’s Standards for Rehabilitation