National Preservation Orgs
National Trust for Historic Preservation
NPS Technical Preservation Services
(Sec. of the Interior’s Standards, Preservation Briefs, Tax incentive info)
The Association for Preservation Technology International (APT)
American Council on Historic Preservation
Library of Congress (Sanborn maps, HABS/HAER collection)
NPS National Register of Historic Places official site
Local Preservation Orgs
DC Preservation League
Local Historic Preservation Offices (HPOs)
Maryland Historical Trust
Virginia Department of Historic Resources
DC Historic Preservation Office
Other Preservation and Historical Orgs of Interest
Historical Society of Washington, D.C.
Maryland Historical Society
White House Historical Association
Society of Architectural Historians
Recent Past Preservation Network
Preservation Society of Charleston (SC)
Other Sites That I Dig!
National Building Museum
Preservation in Pink
My Classmate Kate!
The Globe-Trotting Building Hugger
My Graduate School!