{"nrhp_refnum":"11000039","name":"Witthoefft House","other_names":[],"category":"building","location":{"address":"11 Tallwood Rd","address_restricted":false,"city":"Armonk","county":"Westchester County","state":"NY","lat":41.13050539000005,"lon":-73.73611897899997,"geom_source":"nps_gis"},"listed_date":"2011-02-22","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A one-story International Style house with a lower-level garage at 11 Tallwoods Road in the hamlet of Armonk, town of North Castle, Westchester County, New York. It was designed and built in 1957 by architect Arthur Witthoefft as his family's home.","why_significant":"The nomination argues the house is a fine, rare example of residential International Style design in suburban New York City, under Criterion C for architecture. Its exposed steel frame, brick and glass curtain walls, functional plan and emphasis on the natural setting reflect modernism's move from commercial to residential design. It also won an AIA First Honor Award in 1962.","narrative":"Built in 1957 on a wooded 2.75-acre site in Armonk, this modernist house was designed by architect Arthur Witthoefft for his own family. Its black-painted structural steel frame is infilled with white glazed brick and floor-to-ceiling glass, and it sits over rock outcroppings beside New York City watershed land. Inside, a teak-paneled core separates public and private rooms, and a travertine fireplace divides the living and dining areas. Witthoefft worked at Skidmore, Owings and Merrill, and the house carries that firm's commercial International Style approach into a residential setting. It is described as a rare example of the style in suburban New York City, and it won an American Institute of Architects honor award in 1962. The family lived there until 1989. Later owners altered finishes, and the house then stood vacant for seven years. A restoration beginning in 2007, with the original architect consulting, returned much of its original design and condition.","period_of_significance":"1957","architect_builder":"Witthoefft, Arthur","architectural_style":"Modern Movement: International Style","criteria":["C"],"status_note":"In excellent condition following a restoration begun in 2007 after years of vacancy and earlier alterations; still used as a single dwelling.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:50:48.500097-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/11000039.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/11000039/3772044e0a-800.webp","url_1600":"https://nationalhistoricalregister.com/media/11000039/3772044e0a-1600.webp","licence":"CC BY-SA 3.0","author":"Nat Postrigan","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Witthoefft_House.png\" rel=\"noopener\">Nat Postrigan</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:Witthoefft_House.png"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75323310","wikipedia":"https://en.wikipedia.org/wiki/Witthoefft_House","wikidata":"https://www.wikidata.org/wiki/Q8028592"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/westchester-county/witthoefft-house-11000039/"}