511 Potrero Ave, San Francisco, CA 94110

The three-unit residential building at 511 Potrero Avenue, located in San Francisco's Potrero Hill neighborhood, is a two-story flats and duplex structure built in 1911 and currently owned by Darke 2006 Family Trust - Surviv. The property has experienced several significant plumbing and maintenance issues over its history, with the most recent being a house trap replacement completed in December 2022 and an active building complaint from January 2023 regarding an abandoned storefront.

Of particular concern, there are unresolved housing inspection complaints from 1994 regarding plumbing issues and a possible illegal unit on the bottom floor, along with a 2017 complaint about sewage problems affecting neighboring properties. The building's maintenance history includes various permitted work, such as street space improvements in 2011, unit legalization efforts in 1998, interior renovations in 1993, and bathroom/kitchen remodeling in 1988. Several historical issues have been documented, including toxic mold in 2007, though most past violations appear to have been resolved.

The property has experienced recurring issues with graffiti, with multiple incidents reported between 2015 and 2023, though these generally have been addressed promptly. Infrastructure maintenance includes a complete roofing project from 1993 (permit status expired) and various plumbing repairs, though some concerns persist about the overall condition of the plumbing system as evidenced by recent service requests. The building's age and history suggest a need for ongoing maintenance attention, particularly regarding plumbing systems, though the immediate health and safety concerns appear to be limited to the unresolved plumbing and unit legalization issues from the 1990s.