Dubois-Sarles Octagon, Eight-sided residence in Marlboro, New York.
The Dubois-Sarles Octagon is a two-story eight-sided residence with asphalt siding and a decorative frieze running below the roofline. A porch on the south side faces the Hudson River, positioned on South Street where it commands views of the water.
Built around 1850 by Hudson Dubois, the house received major modifications in 1872 when the Sarles family added a mansard roof and kitchen wing. These changes expanded and updated the original structure while keeping its distinctive eight-sided form.
The floor plan uses a side hallway instead of the radial center layout typical of octagonal houses, creating an unexpected arrangement when you walk through. This unconventional design shape the way rooms connect and how light moves through the interior.
The house remains private property, but you can view the exterior clearly from South Street without needing to enter the grounds. The street position offers good views of both the octagonal shape and the river-facing side of the building.
Among only about 15 octagonal houses still standing in New York State, this one retains its original Greek Revival trim and finishes. The detailed decorative elements and authentic materials remain visible today, offering a rare glimpse into this distinctive building style.
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