{"nrhp_refnum":"70000148","name":"Los Alamos Ranch House","other_names":["Rancho Los Alamos (de la Guerra)","Los Alamos Rancho"],"category":"building","location":{"address":"3 mi. W of Los Alamos on old U.S. 101","address_restricted":false,"city":"Los Alamos","county":"Santa Barbara County","state":"CA","lat":34.754885373000036,"lon":-120.33676390683232,"geom_source":"nps_gis"},"listed_date":"1970-04-15","is_nhl":true,"nhl_designated_date":"1970-04-15","areas_of_significance":["Exploration/Settlement","Architecture"],"significance_levels":["national"],"summary":{"what_it_is":"A one-story adobe ranch house on Rancho Los Alamos, about three miles north of the town of Los Alamos on old U.S. Highway 101, Santa Barbara County, California. Indians from a rancheria on the estate built it after the 1839 land grant to Jose Antonio de la Guerra y Carrillo.","why_significant":"The form calls it probably the finest surviving example of the Mexican-period traditional one-story adobe ranch house. It sits in an unaltered rural setting that gives a clear picture of ranch life in Mexican California. It was also a favorite overnight stop for travelers on El Camino Real between Santa Barbara and Monterey.","narrative":"Rancho Los Alamos, in Santa Barbara County, California, centers on a long one-story adobe ranch house about three miles north of the town of Los Alamos. The 48,803-acre rancho was granted to Jose Antonio de la Guerra y Carrillo by Governor Juan Alvarado in 1839, and Indians from a rancheria on the estate built the house. It was fitted to the hillside and shows some American influence in its plank floors, board ceilings, paneled doors and six-paned window sashes. In the era of Mexican ranchos, it was a favorite overnight stop for travelers on El Camino Real between Santa Barbara and Monterey. The house has been carefully restored, with central heating, electricity and some picture windows added, though its original appearance is little changed. Many original furnishings remain, and the ranch setting is intact. It was recognized as probably the finest surviving Mexican-period adobe ranch house, and it still serves as a residence and working ranch.","period_of_significance":null,"architect_builder":"Built by Indians from a rancheria on the estate, for Jose Antonio de la Guerra y Carrillo","architectural_style":"Mexican period one-story adobe ranchhouse, with some American influence","criteria":[],"status_note":"Described as carefully restored and largely unaltered in a preserved ranch setting, with central heating, electricity and some picture windows added. Present use is residence and ranch.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:55:31.565637-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_CA/70000148_NHL.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/70000148/0879299fa2-800.webp","url_1600":"https://nationalhistoricalregister.com/media/70000148/0879299fa2-1600.webp","licence":"Public domain","author":"National Park Service","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Los_Alamos_Ranch_House_NPS_photo_1968.jpg\" rel=\"noopener\">National Park Service</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Los_Alamos_Ranch_House_NPS_photo_1968.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/123858088","wikipedia":"https://en.wikipedia.org/wiki/Los_Alamos_Ranch_House","wikidata":"https://www.wikidata.org/wiki/Q6681872"},"indexable":true,"url":"https://nationalhistoricalregister.com/california/santa-barbara-county/los-alamos-ranch-house-70000148/"}