3421-3431 20th St, San Francisco, CA 94110

The 6-unit apartment building at 3421-3431 20th Street in the Inner Mission, owned by Biana Chernoguz 1997 Revoc trust, has undergone numerous significant renovations and faced several challenges since its construction in 1906. Most notably, the building is currently non-compliant with soft-story retrofit requirements (Tier 3), and there have been recurring issues with basic services such as heat and hot water, with multiple complaints in 2023 and 2024 regarding these systems.

Recent improvements include a planned $24,000 complete replacement of furnaces and water heaters across all units (2024), and important safety upgrades such as a fire alarm system retrofit completed in late 2023 that replaced bells with horn strobes and added low-frequency horns in all units. The building has experienced several significant maintenance and safety issues in recent years, including a substantial complaint in 2023 regarding multiple problems such as lack of lighting in common areas, damaged walls and floors, and missing smoke/CO detectors. Historical violations from 2016-2017 were addressed, which included mold remediation, window repairs, and various interior maintenance issues.

The property has undergone extensive remodeling work, including kitchen and bathroom renovations in 2022 and siding replacement in 2023. Fire safety has been a recurring focus, with several violations related to alarm systems, sprinklers, and extinguishers noted between 2007 and 2020, though these appear to have been resolved. A recent pattern of complaints in 2024 suggests ongoing maintenance and habitability issues, including reports of rodents and ventilation problems, while multiple parking enforcement calls indicate persistent issues with parking management around the property.