645-647 Baker St, San Francisco, CA 94117

The three-story multi-family residential building at 645-647 Baker Street, owned by Str Baker LLC, was constructed in 1900 and contains three units. The property has undergone several significant improvements and faced notable challenges over the past few decades. Most recently, in January 2024, substantial electrical upgrades were completed, including the installation of new lighting fixtures and electrical circuits, along with plumbing work involving water line relocation for sink and range installation.

The building experienced serious maintenance issues in 2019, with multiple complaints regarding rodent infestation, heating system problems, and safety concerns, prompting violations that were abated by January 2020. Earlier improvements included a complete roof replacement (1989), third-floor remodeling (2002), and various system upgrades such as a sewer line replacement (2014), dryer vent modification (2009), and comprehensive electrical work in 2009 that included installing new service equipment. The property has undergone zoning changes and planning considerations, including a reclassification from RM-1 to NC-1, impacting the southern corners of the intersection.

Recent building maintenance records show ongoing attention to infrastructure, including plumbing repairs, heating system updates, and electrical improvements. A recent pattern of street cleaning issues has been documented through 311 calls in early 2025, though these are generally related to public space maintenance rather than building-specific problems. While the building's history shows periods of significant concern regarding habitability and safety, particularly in 2019, the subsequent corrective actions and recent improvements suggest ongoing maintenance and upgrading efforts by the current ownership.