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HistoryQuest DC

The application, HistoryQuest DC, is an interactive GIS map that provides historical data on approximately 127,000 extant buildings in Washington, DC. The map offers several operational layers of information for the user including historic data on individual buildings, links to documentation on properties listed in the National Register of Historic Places, information on historic residential subdivisions, and the identification and boundaries of the L’Enfant Plan, and the city’s Squares, and Wards. The featured layer in the map—the Historical Data on DC Buildings—provides information from a variety of sources on original dates of construction, architects, owners and builders of the city’s historic buildings.  

The application also includes a Query tool that allows the user to analyze the historic data within a specified geographic area or citywide.

This application has evolved out of the DC Historical Building Permits Database project and is still a work-in-progress. Anyone with additional information or knowledge about specific buildings that will enhance, enrich, or correct the map, please use the “Propose Data Change” on the banner at the top of the map, complete and submit the GeoForm.  

Questions regarding the map or its information should contact the Historic Preservation Office at [email protected], or call (202) 442-8840.