417-421 20th Ave, San Francisco, CA 94121

The three-unit, three-story multi-family residential building at 417-421 20th Avenue in the Central Richmond neighborhood was built in 1916 and is currently owned by the Ping Ping Chen 2012 Living Trust. The property has undergone several significant improvements between 2016 and 2018, most notably the addition of a new unit in 2016 on the first floor that includes two bedrooms, two bathrooms, kitchen, and living room, along with comprehensive fire safety upgrades including the installation of a new fire sprinkler system (57 heads) throughout the building in 2017 costing $30,000.

Other major improvements in 2016-2017 included the installation of new furnaces, comprehensive kitchen and bathroom remodels, and electrical system upgrades including a 200-amp upgrade and kitchen appliance installations. The building has a history of maintenance issues documented in a 2010 complaint that was filed and later abated in 2011, which addressed multiple interior maintenance concerns including peeling interior paint, inoperable cabinet drawers, malfunctioning electrical switches and receptacles, damaged flooring in the bathroom, and required lead-paint safety procedures.

More recent records show active 311 calls primarily related to street-level issues such as encampments and parking concerns in 2024-2025, and there have been several fire safety-related complaints between 2006-2022, though most were found to have no merit or were duplicates. The property underwent additional modifications and repairs including the installation of a new sprinkler monitoring system in 2018 ($3,500) and various plumbing and electrical work, including bathroom remodels and kitchen updates. The most recent building permits and complaints suggest the property has maintained active management and responded to both improvement opportunities and maintenance issues, with no active building violations on record since 2011.