450 25th Ave, San Francisco, CA 94121

The 6-unit, 2-story multi-family residential building at 450 25th Avenue in the Central Richmond district, owned by Wong Bing Lim & Mo Lan Tam, was constructed in 1960 and has undergone several significant updates and maintenance work over the years. Most notably, the building completed a mandatory soft story retrofit in 2016-2017 (classified as Tier 3), which included the installation of grounding electrodes and seismic safety improvements costing approximately $90,000. The building's plumbing system has seen substantial upgrades, with the installation of two Navien tankless water heaters in 2012 and a later replacement in 2017, along with some copper plumbing modifications related to the retrofit work.

In 2018, fire safety concerns were addressed promptly regarding hoarding, combustible materials, and fire extinguishers, with all conditions corrected by September 2018. The building's maintenance history shows regular upkeep, though there have been some historical compliance issues. In 2003, the property was cited for multiple fire safety violations including fire extinguisher maintenance and fire escape ladder conditions, which were all resolved by September 2003.

More recent history shows typical urban maintenance issues such as graffiti removal (2017), flooding (2017), and some infrastructure work including vinyl siding installation (2002) and various subsurface repairs. The property has maintained active compliance with city housing standards, with no current open violations or complaints. Recent 311 calls have primarily concerned external matters such as illegal parking, street cleaning, and nearby encampments, rather than building-specific issues.