{"nrhp_refnum":"91000505","name":"Grubb Mansion","other_names":["1304 High Street"],"category":"building","location":{"address":"1304 High St.","address_restricted":false,"city":"Pottstown","county":"Montgomery County","state":"PA","lat":40.24162804600007,"lon":-75.62106742799995,"geom_source":"nps_gis"},"listed_date":"1991-05-01","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A three-storey brownstone mansion at 1304 High Street on the east end of Pottstown, Montgomery County, Pennsylvania, built in 1906 as a residence in the Eastlake Queen Anne style. A one-storey labor hall was added to the rear in 1956.","why_significant":"The nomination argues the mansion is an outstanding example of Late Victorian Queen Anne architecture and was built for prominent inventor and industrialist William I. Grubb. It is described as the earliest mansion and the only Queen Anne high style home built in the East End, and it set the character of development there. Its craftsmanship, asymmetric massing, porch detailing and art glass are cited as preserved features.","narrative":"Built in 1906 for the Pottstown inventor and industrialist William I. Grubb, this three-storey brownstone mansion stands at the corner of High Street and Mt. Vernon Street on Pottstown's east end. Its asymmetric pinwheel plan, octagonal entry tower, wrap-around porch with fluted wooden half-columns, and steep roof forms reflect the Eastlake Queen Anne style. The walls are rubble-coursed brownstone, and the gable ends are stucco. Interior features include an oak parquet floor and wainscot in the entry hall, molded plaster cove ceilings, and art glass windows, probably by the Kase Glass Studio of Reading. The house is regarded as the earliest and only Queen Anne high style mansion in the East End. Its construction helped start a cluster of large homes along High Street within the following decade. Conversion to offices in 1954 and a rear labor hall added in 1956 changed the building, but its exterior massing and detailing remain largely intact.","period_of_significance":"1906","architect_builder":null,"architectural_style":"Queen Anne (Eastlake Queen Anne with Eastlake detailing)","criteria":["C"],"status_note":"Converted to office use in 1954; slate roof replaced with asphalt shingles; west side porch being reconstructed as a new entrance; interior asphalt tile being removed and original wood floors restored.","vacant_flag":false,"machine_generated":true,"model":"claude-haiku-5-5","prompt_version":"v1.1-2026-10-29","generated_at":"2026-10-29 17:11:36.517421-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_PA/91000505.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/91000505/ef25b68969-800.webp","url_1600":"https://nationalhistoricalregister.com/media/91000505/ef25b68969-1600.webp","licence":"CC0","author":"Smallbones","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Grubb_Mansion_1.JPG\" rel=\"noopener\">Smallbones</a>, <a href=\"http://creativecommons.org/publicdomain/zero/1.0/deed.en\" rel=\"license noopener\">CC0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Grubb_Mansion_1.JPG"},"district":{"nrhp_refnum":"91001756","name":"High Street Historic District","url":"https://nationalhistoricalregister.com/districts/pennsylvania/high-street-historic-district-91001756/"},"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71997856","wikipedia":"https://en.wikipedia.org/wiki/Grubb_Mansion","wikidata":"https://www.wikidata.org/wiki/Q5611865"},"indexable":true,"url":"https://nationalhistoricalregister.com/pennsylvania/montgomery-county/grubb-mansion-91000505/"}