{"nrhp_refnum":"79002155","name":"Gilfillan Farm","other_names":[],"category":"building","location":{"address":"1950 Washington Rd., Upper St. Clair Township","address_restricted":false,"city":"Bridgeville","county":"Allegheny County","state":"PA","lat":40.342238314500065,"lon":-80.06422346025931,"geom_source":"nps_gis"},"listed_date":"1979-11-20","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Agriculture","Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A twelve-building complete working farmstead in Upper St. Clair Township, Allegheny County, Pennsylvania, centred on a two-story brick farmhouse completed in 1857, with a stone spring house, a large 1868 frame barn, and brick and frame outbuildings.","why_significant":"The nomination argues the farm is a rare surviving example of a once-common rural Allegheny County farmstead, now surrounded by suburban development. It is described as the only complete original farm complex remaining in the township, and its late Greek Revival farmhouse with Victorian elements is presented as typical of prosperous mid-nineteenth-century farms in the region.","narrative":"Set beside U.S. Route 19 in Upper St. Clair Township, the Gilfillan Farm is a complete working farmstead built around a two-story, three-bay red brick farmhouse finished in 1857 by John Gilfillan II, grandson of an early settler. Its transomed Greek Revival doorway has ruby and frosted glass sidelights, and the interior retains white pine moulding, paneled doors and marble and slate mantels. Behind the house stand a brick wash house, a brick smoke house dated by an incised brick to 1862, and a stone spring house that predates the main house. The 1868 frame barn, built of local oak, still houses livestock and crops are still grown on the grounds. The farm is valued as a rare survival of the rural agricultural character of the area, which has otherwise given way to suburban development on both sides of the highway.","period_of_significance":"1800-1899","architect_builder":"John Gilfillan II (builder)","architectural_style":"Late Greek Revival with Victorian elements","criteria":[],"status_note":"All buildings are still in use and described as in excellent, well-preserved condition.","vacant_flag":false,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:13:07.61683-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/79002155.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/79002155/ef9791073f-800.webp","url_1600":"https://nationalhistoricalregister.com/media/79002155/ef9791073f-1600.webp","licence":"CC BY-SA 3.0","author":"Daniel Case","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Gilfillan_Farm,_Upper_St_Clair,_PA.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:Gilfillan_Farm,_Upper_St_Clair,_PA.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71994749","wikipedia":"https://en.wikipedia.org/wiki/Gilfillan_Farm","wikidata":"https://www.wikidata.org/wiki/Q5561760"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/allegheny-county/gilfillan-farm-79002155/"}