457-459 Monterey Blvd, San Francisco, CA 94112

The property at 457-459 Monterey Blvd is a two-unit, two-story multi-family residential building located in San Francisco's Sunnyside neighborhood, owned by William Chong and Xiuqing Li. Built in 1946, this flats/duplex structure has undergone several significant modifications and faced various maintenance issues over the years. Most recently, in late 2023, there were multiple sewer issues reported between November and December, with at least eight incidents of sewage backup through a 4-inch vent.

These recent plumbing problems suggest ongoing infrastructure challenges. In 2008, the building underwent substantial modifications, including the legalization of a half bath in garage #1, installation of washer/dryer units in both garages, and construction of a storage room in garage #2, with associated electrical work including a 200-amp service upgrade. Prior to these improvements, the building faced serious habitability issues in 2002, when multiple violations were recorded regarding inadequate heating, mold problems, water damage, bathroom maintenance, and security concerns, including the absence of proper smoke detectors. While these violations were abated by December 2002, they indicate a period of significant maintenance challenges.

The property's history also includes a cancelled permit from 2006 for a vertical addition at the rear of the building that was initially estimated at $371,000. The 2008 construction work appears to have been completed properly, as evidenced by the multiple permits and inspections recorded in conjunction with those improvements. A building complaint from February 2008 regarding unauthorized construction of two ground floor rooms at each garage was noted, though this appears to have been addressed through subsequent permitting and inspection processes. The most recent building history shows particular attention to plumbing issues, with multiple sewer-related service requests in late 2023, suggesting this remains an area requiring ongoing maintenance attention.