{"nrhp_refnum":"06000881","name":"Gould-Guggenheim Estate","other_names":["Sands Point Preserve"],"category":"district","location":{"address":"95 Middle Neck Rd.","address_restricted":false,"city":"Port Washington","county":"Nassau County","state":"NY","lat":40.85974997350007,"lon":-73.69460522626954,"geom_source":"nps_gis"},"listed_date":"2006-09-29","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Social History","Architecture"],"significance_levels":["national"],"summary":{"what_it_is":"A 216-acre estate district at Sands Point, Port Washington, Nassau County, New York, on Long Island Sound, now the county-run Sands Point Preserve. It holds 24 contributing resources, including mansions, stables, a dairy barn and bridges built from about 1901 to 1932.","why_significant":"The estate preserves the remaining land and buildings of Howard Gould's Castlegould and the Guggenheim family estates. It shows the early twentieth-century ideal of a self-sufficient country estate for wealthy industrialists. Its buildings are notable examples of period revival design by firms such as Hunt & Hunt and Polhemus & Coffin.","narrative":"Sands Point Preserve is a 216-acre county park on Long Island Sound in Nassau County, New York. It was assembled from the estates of financier Howard Gould and the Guggenheim family. Gould built a castle-like mansion, later renamed Hempstead House, and a massive granite stable complex designed by Augustus N. Allen around 1902. Daniel Guggenheim bought the property in 1917 and developed it as a working farm with stables, a dairy and thoroughbred horses. His son Harry received part of the land in 1923 and built Falaise, a French Norman manor house by Frederick Sterner and Polhemus & Coffin. Mille Fleur, an eighteenth-century French style house, followed around 1932. Outbuildings include a dairy barn, gate lodge, boathouse, bridges and an iron estate fence. The district is significant as a group of period revival buildings and landscapes that record how wealthy industrial families lived in the early twentieth century. Today the stables serve as the visitor center and museum.","period_of_significance":null,"architect_builder":"Augustus N. Allen; Richard Howland Hunt (Hunt & Hunt); Frederick Sterner; Polhemus & Coffin","architectural_style":"Late 19th & early 20th Century Revivals","criteria":[],"status_note":"Now a county-owned public recreation facility and museum; Castlegould Stables serves as visitor center and offices, Falaise is open for guided tours, and Mille Fleur is closed to the general public.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:51:52.674397-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/06000881.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/06000881/fc5fc398c9-800.webp","url_1600":"https://nationalhistoricalregister.com/media/06000881/fc5fc398c9-1600.webp","licence":"Public domain","author":"Gyrofrog","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:HempsteadHouseSandsPoint.jpg\" rel=\"noopener\">Gyrofrog</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:HempsteadHouseSandsPoint.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75319105","wikipedia":"https://en.wikipedia.org/wiki/Hempstead_House","wikidata":"https://www.wikidata.org/wiki/Q120165"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/nassau-county/gould-guggenheim-estate-06000881/"}