{"nrhp_refnum":"80002661","name":"Onderdonk, Horatio Gates, House","other_names":[],"category":"building","location":{"address":"1471 Northern Blvd.","address_restricted":false,"city":"Manhasset","county":"Nassau County","state":"NY","lat":40.79409603600004,"lon":-73.69194174099994,"geom_source":"nps_gis"},"listed_date":"1980-04-16","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A Greek Revival residence at 1471 Northern Boulevard in Manhasset, Nassau County, New York, built in 1836 for lawyer and judge Horatio Gates Onderdonk by local craftsmen Ian Alart and William Thomas.","why_significant":"The house is architecturally significant as one of the few Greek Revival houses in Nassau County built with a classic temple front, marked by a two-story Doric portico. It is also associated with the locally prominent Onderdonk family. Its prominent siting has made it a widely recognized local and regional landmark.","narrative":"Built in 1836 on Northern Boulevard in Manhasset, this Greek Revival house was commissioned by Horatio Gates Onderdonk, a Columbia-educated lawyer who later served as a county judge. Local craftsmen Ian Alart and William Thomas constructed it. A two-story Doric portico with four fluted columns and a low pediment dominates the south facade, a temple-front form that few Long Island Greek Revival houses received. The house has a two-story, three-bay central block with one-story wings, and detailed entrances with sidelights and transoms. The Onderdonk family, Dutch settlers who reached Manhasset about 1689, kept the property until 1932, when the Levitt and Sons firm bought it, used it as offices and built houses on the land behind. It later served as a neighborhood meeting hall. Although the interior has been altered, the exterior and some original details survive. The house was listed for its architectural distinction and its link to a prominent local family.","period_of_significance":"1800-1899 (specific date 1836)","architect_builder":"Ian Alart and William Thomas","architectural_style":"Greek Revival","criteria":[],"status_note":"Listed as occupied in part but marked unoccupied and vacant in the present-use section; condition fair, interior altered for varied uses. Plans were under way to make it the headquarters of the North Hempstead historical society.","vacant_flag":true,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:50:42.979452-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/80002661.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/80002661/b012863e8a-800.webp","url_1600":"https://nationalhistoricalregister.com/media/80002661/b012863e8a-1600.webp","licence":"Public domain","author":"E. P. McFarland, Photographer","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Judge_Horatio_Gates_Onderdonk_House,_Strathmore_Road_%26_Rolling_Hill_Road,_Manhasset_(Nassau_County,_New_York).jpg\" rel=\"noopener\">E. P. McFarland, Photographer</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Judge_Horatio_Gates_Onderdonk_House,_Strathmore_Road_%26_Rolling_Hill_Road,_Manhasset_(Nassau_County,_New_York).jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75319169","wikipedia":"https://en.wikipedia.org/wiki/Horatio_Gates_Onderdonk_House","wikidata":"https://www.wikidata.org/wiki/Q5902687"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/nassau-county/onderdonk-horatio-gates-house-80002661/"}