{"nrhp_refnum":"11000944","name":"Sinton House","other_names":["Lanza House"],"category":"building","location":{"address":"1020 Francisco St.","address_restricted":false,"city":"San Francisco","county":"San Francisco","state":"CA","lat":37.80382557200005,"lon":-122.42209615399997,"geom_source":"nps_gis"},"listed_date":"2011-12-22","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Art"],"significance_levels":["local"],"summary":{"what_it_is":"A two-story-with-basement-and-penthouse Italian Renaissance style residence at 1020 Francisco Street on Russian Hill, San Francisco, completed in 1927 and altered in 1955, with a rear secondary building originally built as a garage.","why_significant":"The house is significant under Criterion B for its association with artist Eleanor (Nell) W. Sinton, who lived there for 44 years and created some of her best-known works. It is significant under Criterion C for its association with architect John A. Porporato, who designed it, and William W. Wurster, who reorganized the interior in 1955. The form argues it shows the blending of a period revival exterior with a 1950s modern interior approach.","narrative":"Perched on Russian Hill with a sweeping view of San Francisco Bay, this 1927 residence at 1020 Francisco Street was designed by San Francisco architect John Porporato for the Lanza family in an Italian Renaissance style. Its stucco walls are scored to resemble rusticated masonry, and the flat roof has a projecting boxed cornice, with French doors opening onto wrought-iron balconies. A rear building, originally a garage, was later converted to a studio, guest quarters and wine cellar. In 1954 the house passed to Eleanor \"Nell\" Sinton, an early California abstract expressionist painter who later worked in assemblage and collage. In 1955 architect William Wurster moved the public rooms upstairs and the bedrooms down, while keeping the character of the exterior. Sinton lived and worked there until 1981. The property is recognized for her artistic career and for the work of both architects. Later changes include new window glazing in 1971 and a basement garage added in 1998.","period_of_significance":"1927; 1955 (Criterion C); 1955-1981 (Criterion B)","architect_builder":"John A. Porporato (architect); William W. Wurster (1955 alterations); C. Lindberg (builder)","architectural_style":"Late 19th and 20th Century Revival / Italian Renaissance","criteria":["B","C"],"status_note":"Described as in excellent condition; still in use as a single dwelling, with a 1998 subterranean garage and replacement front door noted as alterations.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:54:29.666486-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_CA/11000944.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/11000944/a17ad1802d-800.webp","url_1600":"https://nationalhistoricalregister.com/media/11000944/a17ad1802d-1600.webp","licence":"CC BY-SA 3.0","author":"Sanfranman59","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Sinton_House,_1020_Francisco_St.,_San_Francisco,_CA_3-4-2012_4-51-04_PM.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:Sinton_House,_1020_Francisco_St.,_San_Francisco,_CA_3-4-2012_4-51-04_PM.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/123861305","wikipedia":null,"wikidata":"https://www.wikidata.org/wiki/Q133464843"},"indexable":true,"url":"https://nationalhistoricalregister.com/california/san-francisco/sinton-house-11000944/"}