{"nrhp_refnum":"03000472","name":"Rosecroft","other_names":[],"category":"building","location":{"address":"530 Sivergate Ave.","address_restricted":false,"city":"San Diego","county":"San Diego County","state":"CA","lat":32.69746905400007,"lon":-117.24634746599997,"geom_source":"nps_gis"},"listed_date":"2003-09-22","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Agriculture","Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"Rosecroft is a two-story wood-frame Italian Renaissance style house at 530 Silvergate Avenue in Point Loma, San Diego, built in 1912 and designed by Emmor Brooke Weaver. It now sits on a 2.4-acre lot that was once part of a 10-acre estate and begonia nursery.","why_significant":"The nomination argues the house is significant under Criterion B for its association with Alfred D. Robinson, a nationally recognized horticulturist and leading begonia authority. Robinson hybridized over 100 begonias at Rosecroft and founded the American Begonia Society, the San Diego Floral Association and California Garden Magazine. The form also describes the house as an excellent example of early 20th century Italian Renaissance Revival design by a regionally significant architect.","narrative":"Rosecroft is a 1912 Italian Renaissance style residence at 530 Silvergate Avenue in Point Loma, San Diego. Architect Emmor Brooke Weaver designed the two-story, stucco-clad wood-frame house on a modified H-shaped plan with a low hipped roof, French doors, balconies and a Palladian-style entry. It was built for Alfred D. Robinson and his wife Marion, who developed an estate of gardens and lathhouses around it. Robinson became a leading American authority on begonias, producing more than 100 hybrids at Rosecroft and helping found the American Begonia Society and the San Diego Floral Association. He also edited California Garden Magazine and took part in civic life around the 1915 Panama-California Exposition. The house was later separated from the gardens and now occupies 2.4 acres. The roof was changed from green tile to slate and the entry was altered in the 1970s. Large additions were placed at the rear, away from the original facade. The property was listed for its connection to Robinson and for its architecture, with significance dated 1912 to 1942.","period_of_significance":"1912-1942","architect_builder":"Weaver, Emmor Brooke","architectural_style":"Italian Renaissance","criteria":["B"],"status_note":"The property is described as in excellent condition and still used as a single-dwelling residence. The original 1912 house is historically intact, with later additions at the rear.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:54:29.562273-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_CA/03000472.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/03000472/d9eb2709d0-800.webp","url_1600":"https://nationalhistoricalregister.com/media/03000472/d9eb2709d0-1600.webp","licence":"CC BY-SA 3.0","author":"Bruce Roberson","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Rosecroft.jpg\" rel=\"noopener\">Bruce Roberson</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:Rosecroft.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/123860965","wikipedia":"https://en.wikipedia.org/wiki/Rosecroft_(San_Diego)","wikidata":"https://www.wikidata.org/wiki/Q6112489"},"indexable":true,"url":"https://nationalhistoricalregister.com/california/san-diego-county/rosecroft-03000472/"}