307-311 Guerrero St, San Francisco, CA 94103

The three-story, 6-unit multi-family residential building at 307-311 Guerrero St in Mission Dolores, owned by JMS Properties, was constructed in 1911 and has undergone significant recent improvements, particularly in 2019-2021. The building completed mandatory seismic retrofitting as a Tier 3 soft-story building, demonstrating compliance with safety regulations. Major upgrades in 2019 included the installation of a new fire sprinkler system for the ground floor and underground service ($25,000), comprehensive fire alarm system improvements ($10,000) including monitoring for sprinkler system and low-frequency sounders, and substantial electrical work including a new 400-amp service installation.

A significant renovation occurred in Unit 5 in 2021 ($38,000) involving kitchen and bath upgrades with associated electrical and plumbing work. The property has experienced some resident concerns, particularly during 2019 when there were complaints about construction-related issues affecting air quality and safety, though these were promptly addressed within a week. Several building violations from March 2019 relating to various safety and compliance issues, including egress obstruction and smoke alarm requirements, were also abated within days.

Historical maintenance issues were documented in 1998 regarding heating system problems and door conditions, but these appear to have been resolved. Recent 311 calls from 2024-2025 show recurring issues with debris and graffiti around the property, but these are municipal public space concerns rather than direct building management issues. The building has undergone significant modernization while maintaining compliance with safety regulations, including the installation of two new ADUs (accessory dwelling units) in the basement level, which was permitted under 2016 ordinance 162-16.