400-402 Warren Dr, San Francisco, CA 94131

The 12-unit, 2-story apartment building at 400-402 Warren Drive in Forest Knolls, owned by 525 Howard LLC, has undergone several significant structural improvements since its construction in 1961. The most notable recent work was the completion of mandatory soft-story retrofitting in 2018, which included the installation of front steel moment frames around garage doors at a cost of $90,000. Other major maintenance work included reroofing projects in 2000 ($8,380), 2006 ($11,880), and 1989, as well as the installation of a Ufer ground system in 2019.

The building has experienced several maintenance and safety issues over its history, with the most serious incident occurring in 2000 when there was a landslide at the rear of the property that created hazardous conditions, leading to a violation notice and subsequent abatement process that was completed in 2003. A routine housing inspection in 2003 revealed multiple safety concerns, including blocked exits, combustible materials in parking spaces, egress obstructions, and inadequate gas shutoff tools, all of which were abated by August 2003. More recent concerns include a blocked exit in 2019 (corrected) and two fire-related incidents in 2024.

The building has experienced several routine housing inspections over the years (most recently in 2018), and it is classified as Tier 3 for soft-story compliance with all required work completed. The property has had some recent maintenance issues as evidenced by multiple 311 calls in late 2024, including reports of abandoned vehicles, garbage and debris, and a public stairway defect (currently open). While recent fire incidents recorded (cooking fire, carbon monoxide detector activation, and others) have not resulted in injuries or significant damage, they indicate ongoing monitoring of safety systems is required. The building has also seen two tenant buyout transactions in recent years, one in 2018 for $15,000 and another in 2022 for $40,000, though the addresses listed are different from the building's address.