{"nrhp_refnum":"93000708","name":"Wetherill, Kate Annette, Estate","other_names":[],"category":"district","location":{"address":"Harbor Hill Rd., S side","address_restricted":false,"city":"Head of the Harbor","county":"Suffolk County","state":"NY","lat":40.892435627000054,"lon":-73.16827834453949,"geom_source":"nps_gis"},"listed_date":"1993-08-09","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Entertainment/Recreation","Architecture","Social History"],"significance_levels":["local"],"summary":{"what_it_is":"A 26.75-acre country estate district on Harbor Hill Road in Head of the Harbor, Suffolk County, New York, overlooking Stony Brook Harbor. It centers on an octagonal Colonial Revival house built in 1895 and designed by Stanford White.","why_significant":"The estate is significant as a distinctive and highly unusual example of Stanford White's country house work, using an octagonal form within a Colonial Revival vocabulary. It also represents the social circle of the locally prominent Smith family, who turned the Stony Brook Harbor shoreline into a ring of estates around the turn of the century.","narrative":"Overlooking the southern end of Stony Brook Harbor in Head of the Harbor, this 26.75-acre estate was built in 1895 for Kate Annette Wetherill. Stanford White, her brother-in-law, designed the shingled octagonal house, with gabled faces, a one-story porch on fluted Ionic columns, and an octagonal central hall lit by a skylight. A service wing extends east and was later raised in height. The grounds retain a sloping lawn, an octagonal pump house of glacial stone, stone gate piers with iron gates, remnants of an octagonal rose garden, and a stone arch bridge. A polygonal carriage house, also by White, and a superintendent's residence across the road are included. The estate is recognized for its architecture, as an unusual work within White's country house designs, and for its link to the Smith family circle that shaped the harbor's estate era. Wetherill descended from Richard Smith, founder of Smithtown.","period_of_significance":"1895","architect_builder":"Stanford White (McKim, Mead and White)","architectural_style":"Colonial Revival","criteria":["A","C"],"status_note":"The estate is still used as a single dwelling. The service wing has been raised in height and the original east porch infilled. The gardener's cottage was excluded because of major alterations.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:51:50.918766-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/93000708.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/93000708/b1b3184c92-800.webp","url_1600":"https://nationalhistoricalregister.com/media/93000708/b1b3184c92-1600.webp","licence":"CC BY-SA 3.0","author":"FrankEdwards","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Arial_View_of_15_Waterfront_Acres_Located_in_Head_of_the_Harbor,_Smithtown,_Stanford_Whites_%22Wetherill_Mansion%22_Octagonal_Home_Design.JPG\" rel=\"noopener\">FrankEdwards</a>, <a href=\"https://creativecommons.org/licenses/by-sa/3.0\" rel=\"license noopener\">CC BY-SA 3.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Arial_View_of_15_Waterfront_Acres_Located_in_Head_of_the_Harbor,_Smithtown,_Stanford_Whites_%22Wetherill_Mansion%22_Octagonal_Home_Design.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75314977","wikipedia":"https://en.wikipedia.org/wiki/Kate_Annette_Wetherill_Estate","wikidata":"https://www.wikidata.org/wiki/Q14706726"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/suffolk-county/wetherill-kate-annette-estate-93000708/"}