21-23 Cayuga Ave, San Francisco, CA 94112

The property at 21-23 Cayuga Avenue is a two-unit, two-story multi-family residential building located in San Francisco's Mission Terrace neighborhood. Built in 1947 and currently held in the Elaine Choy Trust, this flats and duplex structure has undergone several significant maintenance and infrastructure improvements over the past decades.

The building received a new roof in 1988, underwent substantial plumbing work in 2008 with the installation of new copper supply lines, and had a house trap replacement in 2017. Additional infrastructure improvements included an undergrounding of utilities in the basement completed in 2003, though this permit has since expired. The property is currently experiencing a cluster of maintenance issues in the surrounding area, as evidenced by recent 311 calls from December 2024.

These include reports of graffiti on nearby infrastructure (some of which appears to be on freeway-related structures requiring Caltrans involvement), multiple instances of garbage and debris requiring street cleaning services, and pavement defects in the vicinity. While these external issues do not directly affect the building's internal condition, they may impact the immediate environment experienced by residents. The building's documented permit history suggests regular maintenance of critical systems, though the relative age of some improvements (e.g., 1988 reroofing) could indicate the potential need for future updates to maintain current standards.