McElroy Octagon House
McElroy Octagon House
The McElroy Octagon House in Gough St. San Francisco, California; structural concrete construction (built 1861)
Location in San Francisco
|Location||San Francisco, California|
|Architectural style||Octagon Mode|
|NRHP Reference #||72000250|
|Added to NRHP||February 23, 1972|
The McElroy Octagon House, also known as the Colonial Dames Octagon House, is a historic octagonal house now located at 2645 Gough Street at Union Street in the Cow Hollow neighborhood of San Francisco, California. William C. McElroy built it in 1861 across the street from its present location. It was vacant and neglected in 1951 when the National Society of the Colonial Dames of America  in California bought it, moved it across the street and began its restoration. In 1971 it became San Francisco Landmark 17. It, the Feusier Octagon House and the Marine Exchange Lookout Station at Land's End are the only three remaining octagon houses in the city.
On February 23, 1972, it was added to the National Register of Historic Places.
The house is open to the public for tours.
- The NSCDA-CA website at http://octagonhouseca.org or http://nscda-ca.org/octagon-house/
- List of San Francisco Designated Landmarks
- The NSCDA web site 
- National Park Service (2008-04-15). "National Register Information System". National Register of Historic Places. National Park Service.
- San Francisco Landmarks: 17
- Sand Francisco Landmarks National Register data from McElroy Octagon House
- Union Street page on Octagon House
- The National Society of the Colonial Dames of America.org: Octagon House, 1861
- LOC.gov: HABS−Historic American Buildings Survey of the McElroy Octagon House, homepage
- LOC.gov: HABS vintage McElroy Octagon House photographs, online gallery
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