331-333 28th Ave, San Francisco, CA 94121

The 331-333 28th Avenue property is a three-story, two-unit multi-family residential building located in the Central Richmond neighborhood, constructed in 1911 and currently owned by Kenny & Amy Tseng. The building has undergone several significant modifications and faced multiple regulatory challenges in recent years. Most notably, in 2021, the property received multiple violations for unpermitted modifications, including unauthorized habitable space conversion, bedroom expansion, unauthorized deck construction, and kitchen modifications across multiple floors.

These violations led to a series of permit applications in 2022-2023, including attempts to legalize a ground floor dwelling unit and address various unauthorized modifications, though some of these permit applications were revoked or filed but not yet approved as of October 2023. The building has seen substantial bathroom improvements, with completed renovations in 2019 adding new bathrooms on the second and third floors, along with electrical and plumbing upgrades. The property has a history of maintenance issues and regulatory scrutiny that includes complaints about illegal units, work done without proper permits, and safety concerns.

A 2021 complaint noted various building condition issues including insects/rodents, dilapidated structure, and broken appliances. While some maintenance issues appear to have been resolved through permitted work, the property remains subject to active violations related to unpermitted modifications, with a final warning letter expected in early 2025. Historical records show earlier permitted improvements including a horizontal extension completed in 1987 and various maintenance calls between 2013-2021 regarding street cleaning, parking, lighting, and graffiti. The building's recent permit history suggests ongoing efforts to address code violations and bring the property into compliance with current building codes, though completion and approval of these permits is still pending as of the latest available data.