Cock-Cornelius House, also known as Wyckoff-Underhill House, is a historic home located at Locust Valley in

Nassau County, New York Nassau County ( ) is a suburban County (United States), county located on Long Island, immediately to the east of New York City, bordering the Long Island Sound on the north and the open Atlantic Ocean to the south. As of the 2020 United St ...

. It is a 1- to -story, U-shaped wood-frame dwelling sheathed in wood shingles. The main block is stories and five bays wide. The oldest section of the house is dated to the Federal period, about 1790. The house was expanded in the 1840s and in the 1920s-1930s. ''See also:'' It was listed on the

National Register of Historic Places The National Register of Historic Places (NRHP) is the Federal government of the United States, United States federal government's official United States National Register of Historic Places listings, list of sites, buildings, structures, Hist ...

in 2006.

References

Houses on the National Register of Historic Places in New York (state) Federal architecture in New York (state) Houses completed in 1790 Houses in Nassau County, New York National Register of Historic Places in Oyster Bay (town), New York {{NassauCountyNY-NRHP-stub