{"nrhp_refnum":"91001872","name":"Bykenhulle","other_names":["Ivy Hall"],"category":"building","location":{"address":"21 Bykenhulle Rd.","address_restricted":false,"city":"Hopewell Junction","county":"Dutchess County","state":"NY","lat":41.58312914500004,"lon":-73.76995670499997,"geom_source":"nps_gis"},"listed_date":"1991-12-30","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"Bykenhulle (also called Ivy Hall) is a large two-story frame Greek Revival farmhouse built in 1841 in Hopewell Junction, Dutchess County, New York, with surviving farm outbuildings on a 5.7-acre remnant of a 154-acre farm.","why_significant":"The nomination argues the house is one of the county's most elaborate Greek Revival farmhouses, with intact formal hall and parlors showing urban-sourced craftsmanship. It reflects the wealth of upper-class Hudson Valley farm families in 1841. Its c.1929 Colonial Revival changes as a country retreat add a second significant period, and it records the evolution of a rural landscape into suburbia.","narrative":"Bykenhulle is a two-story frame farmhouse in Hopewell Junction, Dutchess County, built in 1841 on land Peter Adriance gave his daughter Mary Ann and her husband James Wilkinson. Once the center of a 154-acre farm called Ivy Hall, it now sits on 5.7 acres amid a 1960s suburban subdivision created when the farm was divided in 1963. The house has a five-bay facade, recessed entrances with trabeated surrounds, a grand central hall with a mahogany stair, and two formal parlors with plaster cornices, black marble mantels and silver-plated hardware. These rooms survive largely intact and place it among the county's most elaborate farmhouses. The Genung family farmed the property until 1907. New Yorkers William and Florence Bicknell bought it around 1929, renamed it Bykenhulle and renovated it in Colonial Revival taste. Surviving outbuildings include a dairy barn and a poultry house converted to a hunting lodge. The property is valued as an example of upper-class Greek Revival farm architecture and rural change.","period_of_significance":null,"architect_builder":null,"architectural_style":"Mid-19th Century - Greek Revival; Late 19th & Early 20th Century Revivals - Colonial Revival","criteria":[],"status_note":"Still used as a single dwelling, with the carriage house converted to two rental apartments; a sun room was added in 1989.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:50:45.373578-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/91001872.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/91001872/2c4a32a50a-800.webp","url_1600":"https://nationalhistoricalregister.com/media/91001872/2c4a32a50a-1600.webp","licence":"CC BY-SA 3.0","author":"Daniel Case","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Bykenhulle,_Hopewell_Junction,_NY.jpg\" rel=\"noopener\">Daniel Case</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:Bykenhulle,_Hopewell_Junction,_NY.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75317311","wikipedia":"https://en.wikipedia.org/wiki/Bykenhulle","wikidata":"https://www.wikidata.org/wiki/Q5004099"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/dutchess-county/bykenhulle-91001872/"}