400-402 Prentiss St, San Francisco, CA 94110

The multi-family residential building at 400-402 Prentiss Street in Bernal Heights is a two-unit, two-story structure built in 1900, currently owned by Riechers Christina & Bale L. The property has undergone significant recent renovations, with major work occurring between 2019-2022 including bathroom and office additions, bedroom and kitchen relocations, and foundation replacement costing in excess of $300,000. During this period, numerous plumbing and electrical upgrades were completed, including the installation of a hydronic heating unit, solar panel system, and replacement of old knob and tube wiring.

The building experienced several construction-related issues in 2019, including complaints about unauthorized third-floor work and construction dust entering units, though these complaints have since been marked as not active. Most concerning are recent sewer-related incidents, with multiple sewage backup discharge reports from August 2024 (four separate incidents), suggesting potential plumbing system issues. The property has also had some infrastructure concerns noted in 2024, including an open pavement defect report and a tree maintenance issue affecting the building's window or structure.

Historical records show earlier improvements including roof repairs, basement reinforcement, and porch renovations dating back to the 1990s and 2000s. The owners previously completed tenant buyouts at the property in December 2018 ($32,000 for 2 tenants) and October 2020 ($148,000 for 5 tenants), indicating significant turnover prior to the recent renovations. Compliance records show various permits for interior work and modifications, with specific attention paid to maintaining cumulative interior demolition within acceptable limits.