26 and 28 Marlborough St., Portland, Connecticut. County/parish: Middlesex.
Added to the National Register of Historic Places April 22, 1976. NRIS 76001985.
2 contributing buildings.Also known as:
The Joseph Williams Octagon House and the Gilbert Stancliff Octagon House are once-identical historic mid-1850s octagon houses located next to each other at 26 and 28 Marlborough Street in Portland, Connecticut. Constructed of Portland brownstone in the 1850s, they are distinctive as the only known pair of little-altered octagon houses in the state. The pair of houses, also known as the Octagon House Pair, was added to the National Register of Historic Places in 1976.
(read more...)National Park Service documentation: https://catalog.archives.gov/id/132355200