{"nrhp_refnum":"100008116","name":"Crest, The (Boundary Increase)","other_names":["Robinson House","Hasbrouk-DeLamater House"],"category":"building","location":{"address":"563 Asharoken Ave.","address_restricted":false,"city":"Huntington","county":"Suffolk County","state":"NY","lat":null,"lon":null,"geom_source":null},"listed_date":"2022-09-09","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Community Planning and Development","Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A large Tudor-style summer mansion at 563 Asharoken Avenue in Asharoken, Huntington, Suffolk County, New York, built in 1902 for Oakley R. DeLamater and designed by architect Harry E. Donnell.","why_significant":"The house is tied to the DeLamater family, whose iron works helped build the Civil War ironclad Monitor, and to the development of the Eaton's Neck and Asharoken estates. It survives nearly as built in 1902 and has been restored. The document does not set out the formal criteria or a period of significance.","narrative":"Perched on a hilltop above Duck Cove in Asharoken, Long Island, this Tudor-style mansion at 563 Asharoken Avenue was completed in 1902. Architect Harry E. Donnell designed it for Oakley R. DeLamater, who gave it to his wife, Elizabeth Hasbrouk DeLamater, as a wedding present. The family used it as a summer residence. DeLamater wealth came from the DeLamater Iron Works, whose engineers and machinery were part of the Civil War ironclad Monitor. The house has several Tudor gables, five fireplaces, eight original bedrooms, a servants' wing, cypress trim, cedar shake roofing and hardwood floors. It was lost to unpaid taxes during the Depression and passed through many owners, with the grounds shrinking to about five acres. After a period of neglect, it was restored in the 1990s and again in 2006-2007. Staff of the state preservation office verified that it still retains its historic character, apart from a later three-bay garage attached to the former stable.","period_of_significance":null,"architect_builder":"Harry E. Donnell (architect)","architectural_style":"Tudor mansion with half-timbering and Tudor gables (no formal style classification stated)","criteria":[],"status_note":"Restored by the current owners between 2006 and 2007; described as appearing almost exactly as built in 1902, with a later three-bay garage added. In use as a residence.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:50:48.577953-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/85003645.pdf"},"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75314857","wikipedia":null,"wikidata":null},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/suffolk-county/crest-the-boundary-increase-100008116/"}