McElroy Octagon House, Historic octagonal residence in Cow Hollow, San Francisco, United States.
The eight-sided wooden house at 2645 Gough Street features two floors connected by a central winding staircase and multiple rectangular windows.
William McElroy constructed this residence between 1860 and 1861, following architectural principles from Orson Fowler's publication about octagonal building designs.
The National Society of Colonial Dames of America maintains the building as a museum, displaying period furniture and architectural elements from the 1800s.
Visitors can explore the house through monthly guided tours, learning about its architectural features and the restoration efforts that saved it from demolition.
Inside an upstairs wall, workers discovered a tin box containing documents that revealed the identities of the original builders and early owners.
Location: San Francisco
GPS coordinates: 37.79778,-122.42639
Latest update: March 11, 2025 12:03
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