{"nrhp_refnum":"75001673","name":"Manchester, Isaac, House","other_names":["Plantation Plenty"],"category":"building","location":{"address":"2 mi. S of Avella on PA 231","address_restricted":false,"city":"Avella","county":"Washington County","state":"PA","lat":40.25480924900006,"lon":-80.46101014799996,"geom_source":"nps_gis"},"listed_date":"1975-06-21","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture","Agriculture"],"significance_levels":["local"],"summary":{"what_it_is":"A five-bay, 2 1/2 story red brick Georgian house with a gambrel roof, center entrance and farm outbuildings, located in Avella, Washington County, Pennsylvania. The house was built in 1815 and is associated with Isaac Manchester.","why_significant":"The nomination describes the house as one of the finest Georgian houses extant in Western Pennsylvania, with a New England form and Philadelphia Georgian interior woodwork. The house has stayed in the family and is said to be almost unaltered since construction. The outbuildings are described as an unusual arrangement for the region, and the workshop and granary show distinctive early construction and woodworking.","narrative":"Avella's Isaac Manchester House is a five-bay, 2 1/2 story red brick Georgian dwelling with a gambrel roof, a center entrance and a stone-dressed stoop. Built in 1815 and kept within the Manchester family, it is regarded as one of the finest Georgian houses in Western Pennsylvania. Its form follows New England models, while the interior woodwork, including a parlor and staircase of native black cherry, is in the Philadelphia Georgian style. Manchester brought the Philadelphia cabinetmaker John McGovern to design and build the interiors. The house is also significant for its farm complex, arranged around a fieldstone-walled quadrangle. The outbuildings include a stillhouse, a springhouse and carriage house, a granary of oak timbers set on end, a workshop with a rope-powered lathe, and a large bank barn. Several of these buildings date from the late 1700s and early 1800s, and their arrangement is considered unusual for the region.","period_of_significance":"1815","architect_builder":"Isaac Manchester (owner and builder as stated); John McGovern (cabinetmaker, interiors)","architectural_style":"Georgian","criteria":["C"],"status_note":"The outbuildings are described as in good to excellent condition with new roofs and routine repairs; the house is described as unaltered except for heating, electricity and plumbing installations.","vacant_flag":false,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:29.298359-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/75001673.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/75001673/3577244b60-800.webp","url_1600":"https://nationalhistoricalregister.com/media/75001673/3577244b60-1600.webp","licence":"CC BY-SA 3.0","author":"Generic1139","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Isaac_Manchester_House.jpg\" rel=\"noopener\">Generic1139</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:Isaac_Manchester_House.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71994559","wikipedia":"https://en.wikipedia.org/wiki/Isaac_Manchester_House","wikidata":"https://www.wikidata.org/wiki/Q6076740"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/washington-county/manchester-isaac-house-75001673/"}