1731-1735 Lake St, San Francisco, CA 94121

The property at 1731-1735 Lake Street is a 4-story, 6-unit multi-family residential building constructed in 1911, now owned by the Caspar Marital Trust. The building has undergone significant safety upgrades in recent years, most notably in 2018 when a comprehensive fire safety improvement project was completed, including the installation of a new NFPA 13 sprinkler system on the first floor ($17,350), an upgraded fire alarm system with sprinkler monitoring ($4,000), and low-frequency sounders for new unit sleeping areas ($1,000). These improvements were part of a seismic retrofit program (Permit #201605127304) that brought the building into compliance with current safety standards.

The building has a history of maintenance and compliance issues, particularly during the 2003-2004 period when multiple complaints were filed regarding unauthorized construction, electrical work without permits, and a leaking roof causing mold problems. More recent complaints in 2018 raised concerns about heating systems and smoke enclosure doors, though these violations were addressed through subsequent permits and repairs. The property is classified as a Tier 3 soft-story building, indicating it has completed the necessary seismic improvements.

The most recent building maintenance history shows regular upkeep of major systems, including plumbing upgrades (new hot water heater installed in 2016) and electrical system improvements. Recent activity at the property has primarily consisted of routine maintenance and external issues such as parking enforcement matters, with the most recent 311 calls relating to parking violations in late 2024. The building's fire safety systems have been regularly maintained and upgraded, with no recent fire safety violations recorded since the 2018 upgrades. The property has been generally compliant with building codes since the major 2018 safety improvements, with no active violations currently on record.