{"nrhp_refnum":"77000286","name":"Treadwell Mansion and Carriage House","other_names":["Macky Hall and Carriage House"],"category":"building","location":{"address":"5212 Broadway","address_restricted":false,"city":"Oakland","county":"Alameda County","state":"CA","lat":37.83575552700006,"lon":-122.25081449999999,"geom_source":"nps_gis"},"listed_date":"1977-07-15","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Education","Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A three-story wood-frame Victorian mansion (Macky Hall) and its two-story Carriage House at 5212 Broadway, Oakland, built between about 1870 and 1880 and probably designed by Clinton Day. They stand on the campus of the California College of Arts and Crafts.","why_significant":"The nomination cites the buildings as rare large Stick-Eastlake mansions remaining in Oakland. It also points to their use as the residence of James Treadwell, an Alaska gold pioneer and East Bay industrialist, and as the nucleus of the campus of a leading Bay Area art college.","narrative":"Macky Hall, originally the Treadwell mansion, and its Carriage House sit near the center of a 4.5-acre college campus at 5212 Broadway in Oakland. Built between about 1870 and 1880, the three-story wood-frame house is in the Stick-Eastlake manner, with bay windows, vertical trim, scalloped third-floor shingles and gabled dormers. A sketch note points to San Francisco architect Clinton Day as the likely designer. The John Treadwell family, whose wealth came from Alaska gold, coal, railroading and clay products, owned the estate from 1888. In 1923 it was sold to Frederick Meyer, founder of the California School of Arts and Crafts, who adapted both buildings for academic use. The house now serves as administrative offices, and its exterior is largely unchanged. The Carriage House once held studios, has been moved several times for new buildings, and was unoccupied at the time of nomination. The buildings are valued as rare large examples of their style in Oakland and as the core of the campus.","period_of_significance":"c. 1880 to 1935","architect_builder":"Architect: probably Clinton Day; builder not known","architectural_style":"Stick-Eastlake, with touches of Queen Anne and Victorian Gothic","criteria":[],"status_note":"Macky Hall is in excellent condition and used as the college administrative office building. The Carriage House is in good condition but unoccupied on a temporary foundation after being moved several times.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:55:32.198431-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_CA/77000286.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/77000286/a27c1ee61d-800.webp","url_1600":"https://nationalhistoricalregister.com/media/77000286/a27c1ee61d-1600.webp","licence":"Public domain","author":"Danny Guthrie","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Macky_Hall_aka_Treadwell_Mansion,_Oakland,_California.png\" rel=\"noopener\">Danny Guthrie</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Macky_Hall_aka_Treadwell_Mansion,_Oakland,_California.png"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/123858357","wikipedia":"https://en.wikipedia.org/wiki/Treadwell_Mansion_and_Carriage_House","wikidata":"https://www.wikidata.org/wiki/Q119995339"},"indexable":true,"url":"https://nationalhistoricalregister.com/california/alameda-county/treadwell-mansion-and-carriage-house-77000286/"}