{"nrhp_refnum":"82001105","name":"Hartwell, W. W., House & Dependencies","other_names":["Regina Maria Retreat House"],"category":"building","location":{"address":"77 Brinkerhoff St.","address_restricted":false,"city":"Plattsburgh","county":"Clinton County","state":"NY","lat":44.69641131600008,"lon":-73.45842628199995,"geom_source":"nps_gis"},"listed_date":"1982-11-12","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture","Social History"],"significance_levels":["local"],"summary":{"what_it_is":"A stone Second Empire mansion built c. 1870 by William W. Hartwell at 77 Brinkerhoff Street, Plattsburgh, Clinton County, New York, with a stone carriage house and a clapboard groundskeeper's cottage (c. 1885) on a 1.9-acre park-like site.","why_significant":"The inventory calls the main house the finest example of Second Empire architecture in Plattsburgh, noting its stone construction and remarkable integrity. It retains its original park and garden setting with carriage house and cottage. It is also tied to Hartwell (1821-1891), a prominent local merchant, manufacturer and civic leader. The evaluation sheet recommends acceptance under Criteria A and C.","narrative":"Built around 1870 at 77 Brinkerhoff Street in Plattsburgh, this stone mansion was the residence of William W. Hartwell, a merchant and manufacturer who ran an iron foundry, flour mills, and lumber, grocery and hardware businesses. He also served as president of the village and of the local board of education. The house is described as the finest Second Empire building in the city, with a three-story mansard tower, polychrome hexagonal slate roof, heavily molded entablatures, brackets, stone keystones over arched windows, stained glass on the first floor, and a large original veranda. A stone carriage house with arched openings matching the main house survives, though its roof has been altered. A clapboard groundskeeper's cottage of about 1885 shows Colonial Revival styling. The estate keeps its original park and garden setting and a high degree of integrity, and remains in good to excellent condition on a 1.9-acre site.","period_of_significance":null,"architect_builder":"Builder: William W. Hartwell","architectural_style":"Second Empire (main house); Colonial Revival (groundskeeper's cottage)","criteria":["A","C"],"status_note":"Main house in excellent condition; used as a sisters' residence (Regina Maria Retreat House); cottage in excellent condition and still 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 02:50:43.220651-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_NY/82001105.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/82001105/bf871137f1-800.webp","url_1600":"https://nationalhistoricalregister.com/media/82001105/bf871137f1-1600.webp","licence":"CC BY-SA 3.0","author":"Mwanner","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:W._W._Hartwell_House_%26_Dependencies_in_Plattsburgh,_New_York.JPG\" rel=\"noopener\">Mwanner</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:W._W._Hartwell_House_%26_Dependencies_in_Plattsburgh,_New_York.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/75312345","wikipedia":"https://en.wikipedia.org/wiki/W._W._Hartwell_House_%26_Dependencies","wikidata":"https://www.wikidata.org/wiki/Q14707617"},"indexable":true,"url":"https://nationalhistoricalregister.com/new-york/clinton-county/hartwell-w-w-house-and-dependencies-82001105/"}