3140 21st St, San Francisco, CA 94110

The 27-unit, three-story apartment building at 3140 21st Street in the Inner Mission, owned by Strain Family 2020 Revocable Trust, has undergone significant maintenance and safety improvements since its 1927 construction. The building completed mandatory seismic retrofitting in 2015 (Tier 2 status) and underwent a comprehensive fire alarm system upgrade in 2022 to comply with current fire safety codes, including the installation of new sounders, smoke detectors, and pull stations.

Notable improvements include a complete window replacement project in 2014-2015 involving 221 windows, re-roofing in 2017, and various unit upgrades including fire escape repairs, electrical system improvements, and plumbing upgrades. The building has experienced several significant incidents, including a fire in Unit 201 in 2017 that caused moderate damage, and periodic issues with the boiler permit that was most recently addressed in 2023.

Fire safety concerns have been documented through inspections and complaints, with the most recent violation in 2024 regarding the alarm system, though this has since been abated. The property has maintained an active maintenance schedule, addressing both routine upkeep and emergency repairs, though some historical complaints from 1995 through 2010 revealed various resident concerns including maintenance issues, which appear to have been resolved. The building's recent history (post-2015) shows consistent attention to safety systems and building code compliance, with no current active violations or complaints as of October 2023.