The DePew House was built by Isaac DePew around the time of the American Revolution and was maintained by the original family until 1881. After this time it was owned by the Blauvelt and Morrell families and by 1929 the homestead and farm was purchased by the State of New York as part of the Rockland Psychiatric Hospital's 638 acre facility. It was acquired by the Town of Orangetown and in 2004 the Orangetown Historical Museum & Archives began renovation and officially opened to the public in 2007. It is a typical Dutch sandstone house with a gambrel roof; the clapboard addition in the 1930's serves the museum with extra exhibition space. This sandstone and frame homestead now hosts our museum’s changing exhibits, archives, and offices.