1521 20th Ave, San Francisco, CA 94122

The two-unit residential building at 1521 20th Avenue in the Central Sunset neighborhood is a two-story structure built in 1988, following the demolition of a single-family dwelling in late 1986. The property's history shows significant regulatory attention in the early 1990s when there was an attempt to address an illegal basement kitchen conversion, with a permit issued in 1993 to revert the building back to its intended two-unit configuration.

The most recent building-related incident occurred in January 2023, involving a flooding issue that affected the property and was resolved through PUC Sewer Operations. The property has experienced a series of municipal service calls between 2019 and 2023, primarily related to external maintenance and urban infrastructure rather than building-specific issues.

These have included two instances of loose garbage cleanup in 2019-2021, tree maintenance matters in 2021, and various street-related complaints such as graffiti removal in September 2022 and a bicycle lane blockage in October 2020. A street light on the property was replaced in September 2011, and there have been multiple outreach and enforcement incidents recorded for service requests. The building's documented history suggests regular interaction with municipal services, mostly concerning external and neighborhood maintenance issues rather than internal building problems.