3173 21st St, San Francisco, CA 94110

The property at 3173 21st Street is a two-story, four-unit multi-family residential building with a ground-floor retail space, constructed in 1900 and currently owned by Dorothy I. Chao. The building has undergone several significant renovations and improvements over the past decade, with the most recent major work completing in late 2022, including the remodeling of tenant spaces and an all-gender restroom upgrade, along with associated plumbing and electrical work totaling $40,000.

Previous improvements include a 2019 electrical upgrade to 400-amp service and maintenance of various units, including bathroom and kitchen remodels. The building has experienced some challenges, notably a fire incident in 2012 that affected the third floor, requiring repairs to the deck and exterior siding, and a mice infestation complaint from December 2022. Multiple violations related to building maintenance were recorded in 2007, including issues with windows, walls, and plumbing, though these were subsequently abated. Fire safety has been an ongoing concern, with several violations recorded between 2019-2023 related to extinguishers, blocked exits, and alarm systems, with a violation issued most recently in December 2023 regarding building contact information.

The property has seen consistent investment in maintenance and upgrades, with historical records showing attention to various building systems including electrical, plumbing, and fire safety. While there have been periods of maintenance issues, particularly in 2007-2008, the more recent history of the building shows regular improvements and compliance efforts. The ground floor retail space and the building's mixed-use nature have been central to its recent renovation activities, with permits showing conversion of garage areas to retail space and preparations for new tenants. Recent complaints regarding garbage and debris (January 2025) suggest ongoing external maintenance challenges, though these are more related to public space management than building condition itself.