1262 21st Ave, San Francisco, CA 94122

The two-unit residential building at 1262 21st Avenue in the Central Sunset neighborhood, owned by Billy Y. and Tina W. Tsang, was constructed in 1987 and stands two stories tall.

The property has experienced several significant events, most notably an active building complaint filed in February 2022 regarding unauthorized construction, including reports of water intrusion, structural problems, and an alleged illegal rear vertical addition with roof deck. This complaint remains active as of the latest available data. In mid-2022, there was a permitted modification to minimize a rear storage shed and remove a deck cover, though this appears to be an attempt to address compliance issues. Earlier building permits show historical maintenance work including siding replacement and patio railguard updates from 1995, while the original residential structure was completed following demolition in 1986.

The property's external environment has been subject to various municipal service calls, including reports of abandoned vehicles and sidewalk parking violations between 2014 and 2025. A notable recent incident involved a Christmas tree disposal in early January 2025. While these external issues don't directly impact the building's condition, they do reflect on the property's immediate surroundings. The most pressing concern remains the ongoing building complaint from 2022 regarding unauthorized modifications and structural issues, which has not yet been resolved according to the available records.