{"nrhp_refnum":"89000258","name":"Locke House","other_names":["Locke,William Lovering,House"],"category":"building","location":{"address":"3911 Harrison St.","address_restricted":false,"city":"Oakland","county":"Alameda County","state":"CA","lat":37.822052787000075,"lon":-122.25032835099995,"geom_source":"nps_gis"},"listed_date":"1989-04-07","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A three-story residence at 3911 Harrison Street in Oakland, California, built in 1911 for William Lovering Locke and designed by architect John Hudson Thomas. A contemporary garage stands at the rear, and the house is now used for professional offices.","why_significant":"The nomination presents it as a large, good example of the early work of master architect John Hudson Thomas. It cites his innovative use of roughcast stucco, repeated patterns, interior windows and Craftsman light fixtures. It also argues the house marks a clear break from the Beaux-Arts and classic styles then popular, and notes it was designated an Oakland city landmark in 1979.","narrative":"Built in 1911 in the hills above Lake Merritt, about a mile east of downtown Oakland, this three-story house was designed by John Hudson Thomas for William Lovering Locke. Thomas used thick roughcast stucco meant to resemble masonry, along with arched windows, interior windows, repeated geometric patterns and hammered copper and mica Craftsman light fixtures. A tower rises above interlocking wings, and the design draws on Secessionist, Craftsman, Mission Revival and Prairie School ideas. The house was completed the year after Thomas's partnership with George Plowman ended, a period described as his most creative. It is one of eleven documented Thomas houses in Oakland. The structure has seen few changes: two porches were enclosed and some fascia decoration was removed. In 1988 sprinklers, handrails and accessibility features were added so the building could serve as professional offices. The garage has deteriorated. Oakland designated the house a city landmark in 1979.","period_of_significance":"1911","architect_builder":"Thomas, John Hudson","architectural_style":"Late 19th and early 20th Century American movements: Prairie School, Craftsman, Mission (Secessionist as described in text)","criteria":["C"],"status_note":"Converted from a single-family residence to professional offices (law office); minimal alterations made in 1988 for safety and code compliance. The garage is in poor condition and awaits restoration.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:54:27.507628-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_CA/89000258.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/89000258/6e6ca4524d-800.webp","url_1600":"https://nationalhistoricalregister.com/media/89000258/6e6ca4524d-1600.webp","licence":"CC BY-SA 3.0","author":"Sanfranman59","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Locke_House_(Oakland,_CA).JPG\" rel=\"noopener\">Sanfranman59</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:Locke_House_(Oakland,_CA).JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/123858262","wikipedia":null,"wikidata":"https://www.wikidata.org/wiki/Q133254969"},"indexable":true,"url":"https://nationalhistoricalregister.com/california/alameda-county/locke-house-89000258/"}