{"nrhp_refnum":"92000312","name":"Jack, Robert, House","other_names":["Jack House"],"category":"building","location":{"address":"536 Marsh St.","address_restricted":false,"city":"San Luis Obispo","county":"San Luis Obispo County","state":"CA","lat":35.27729657000003,"lon":-120.66574012499996,"geom_source":"nps_gis"},"listed_date":"1992-04-13","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Community Planning and Development","Commerce"],"significance_levels":["local"],"summary":{"what_it_is":"A two-story wood frame Italianate residence at 536 Marsh Street in San Luis Obispo, California, completed in 1882 for banker and wool grower Robert Jack, with a wash house, carriage house and gardens on the grounds.","why_significant":"The nomination argues significance under Criterion B in commerce and development for its association with Robert Jack, who lived there from 1882 until his death in 1916. Jack was a banker, land speculator and wool grower who helped organize efforts to bring the railroad through San Luis Obispo and the central coast. The form notes the house is likely also significant for its Italianate architecture but says this is not supported in the nomination.","narrative":"Built in 1882 at 536 Marsh Street in San Luis Obispo, this two-story wood frame Italianate house was the home of Robert Edgar Jack, a banker, land developer and wool grower. It has a low-pitched roof with a balustrade, wide eaves with decorative brackets, tall narrow windows, two single-story bays and a shallow front porch. Inside, eight major rooms open off a central hall, and the plaster ceiling work, marble mantel and stairs are original. The grounds hold a wash house and carriage house, along with a gazebo and utility building added in 1980. Jack lived here until his death in 1916, and his family occupied the house until 1974, when it was deeded to the city and became a museum. Jack helped organize local efforts to bring the railroad through the central coast, held several banking and hotel interests, and was Chairman of the City Trustees from 1890 to 1893. The property is recognized for his role in the area's commercial growth.","period_of_significance":"1882-1894","architect_builder":"Evans, William","architectural_style":"Late Victorian: Italianate","criteria":["B"],"status_note":"Deeded to the city in 1974 by Jack family heirs and now used as a museum; the interior is little changed and the original furnishings and library were included in the gift.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:54:27.001389-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_CA/92000312.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/92000312/b026f7da17-800.webp","url_1600":"https://nationalhistoricalregister.com/media/92000312/b026f7da17-1600.webp","licence":"CC BY-SA 3.0","author":"Mountmonty","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Jack_House_-_Front_of_House.JPG\" rel=\"noopener\">Mountmonty</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:Jack_House_-_Front_of_House.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/123861466","wikipedia":"https://en.wikipedia.org/wiki/Robert_Jack_House","wikidata":"https://www.wikidata.org/wiki/Q14683821"},"indexable":true,"url":"https://nationalhistoricalregister.com/california/san-luis-obispo-county/jack-robert-house-92000312/"}