431-433 21st Ave, San Francisco, CA 94121

The two-unit residential building at 431-433 21st Avenue in San Francisco's Central Richmond neighborhood is a two-story flats and duplex structure built in 1924, currently owned by the Nancy F Ozaki 2000 Living Trust. The property has undergone several significant maintenance and repair projects over the past few decades, with the most recent major work being a $12,500 reroofing project initiated in January 2021.

Other notable improvements include a substantial $24,000 siding replacement project completed in 2013, back steps repair and structural reinforcement work from 2001, and a post-beam connection reinforcement project completed in 2005. The building's maintenance history shows regular upkeep of critical systems, with three roofing projects recorded between 2002 and 2021, suggesting attention to maintaining weather protection. The property has experienced various street-level issues in recent years, with multiple 311 calls regarding sidewalk and street conditions, though these external matters don't directly reflect on the building's internal condition or management.

Recent incidents in 2024 included reports of garbage and debris, with one case involving human waste or urine, while earlier incidents in 2022 noted hazardous materials. The building's parking situation has generated several enforcement calls between 2019 and 2021, primarily regarding sidewalk parking violations which were addressed by parking enforcement officers. The property's maintenance record and building permits demonstrate regular structural upkeep, though the concentration of exterior-related 311 calls in recent years (particularly 2024) merits attention as part of the property's environmental context.