4447 23rd St, San Francisco, CA 94114

The two-unit residential building at 4447 23rd Street in Noe Valley, operated by 4447 23rd Street LLC, is a two-story flats and duplex structure built in 1902. The property underwent significant renovations in 2010, including a substantial $100,000 improvement project that added new stairs between stories, remodeled two kitchens and bathrooms, installed new sliding glass doors, and completed a voluntary seismic upgrade worth $15,000 to reinforce the north and south elevations with new bridge beams, skylights, and window modifications.

These improvements were accompanied by comprehensive updates to the building's systems, including the installation of two furnaces and air ducts, new plumbing infrastructure for multiple fixtures, and complete electrical system upgrades with separate metering for both units and house-wide improvements in 2010. The building has had several maintenance and safety-related issues in recent years, with the most recent records showing a carbon monoxide incident, though no civilian injuries were reported.

The property has experienced multiple tree-related incidents in 2024, including fallen trees and hanging limbs, along with ongoing noise complaints and public amenity maintenance issues like an overflowing garbage can. The building's maintenance history shows proper conversion of an illegal kitchen to a laundry room in 1995, and prior to recent issues, the property had met various code compliance requirements, including a 1983 permit for conforming to codes. While the building underwent extensive modernization in 2010, the recent spike in maintenance issues suggests potential challenges in ongoing property upkeep.