3525-3529 20th St, San Francisco, CA 94110

The 12-unit, 3-story apartment building at 305 San Carlos Street, built in 1924, has undergone significant improvements and renovations over recent years, particularly following the 2017 addition of two accessory dwelling units (ADUs) and completion of mandatory soft-story seismic retrofitting. Major upgrades include the installation of a comprehensive fire safety system in 2019 (including sprinklers, alarms, and monitoring), security enhancements such as window bars, and various unit-specific improvements like the $72,000 renovation of Unit 6's kitchen and bathroom in 2021. The property has experienced recurring fire safety inspections, with recent complaints in late 2024 regarding extinguishers, hazardous materials, and alarm systems, though these were marked as "Condition Corrected" by early 2025.

Historical records show a cluster of building violations from 2000 (including issues with flooring, plumbing, stairs, smoke detectors, and rodent infestation), all of which were resolved by January 2001. Emergency response data indicates multiple system activations (smoke, CO, and false alarms) over the years, but with no reported civilian injuries from any incidents. Recent 311 calls from January 2025 primarily relate to street cleaning issues outside the building, rather than internal property concerns.

The property's recent history demonstrates a proactive approach to maintenance and safety compliance, with substantial investment in modernizing fire safety systems, creating additional living space through ADUs, and addressing structural requirements like soft-story retrofit completion. However, the recurring nature of fire safety violations and recent complaints suggests this remains an area requiring ongoing attention. The building's management has generally responded promptly to violations and complaints, as evidenced by the "Condition Corrected" status on many recent fire safety issues. The majority of building improvements have been formally permitted and completed, including significant infrastructure upgrades such as electrical panel improvements for all units, comprehensive fire safety system installations, and various individual unit renovations.