2635-2637 Lyon St, San Francisco, CA 94123

This three-story, two-unit multi-family residential building at 2635-2637 Lyon Street in Cow Hollow was constructed in 1922 and underwent significant renovations between 2009-2011. The most substantial work occurred in 2010, when the building received substantial structural improvements including a $75,000 foundation replacement with reinforced concrete and retention wall reinforcement at the rear. This was followed by various interior and exterior upgrades, including the installation of a new low-pressure condensing boiler system, comprehensive plumbing updates with 27 new fixtures, and electrical system improvements.

The renovation project also included a one-story horizontal addition on the first floor and interior renovations of both units, with the architectural plans being revised during construction to modify windows to sliding doors in 2011. More recently, the building has experienced some maintenance and safety incidents, though none appear severe. There were two instances of automatic fire alarm activations recorded, one due to a malfunction and another as a false alarm, both with no civilian injuries.

The property has had some street-related issues documented through 311 calls between 2023-2024, primarily concerning garbage and debris in the vicinity, though these are street-related issues rather than interior building concerns. The most recent building-related permits were issued in 2011, suggesting no major structural changes have been made in the past decade, though this could indicate that the significant improvements made in 2009-2011 resolved the previous building deficiencies. The property management has maintained compliance with necessary permits and inspections throughout the renovation process, as evidenced by the completion status of all major improvement permits.