642 20th Ave, San Francisco, CA 94121

The property at 642 20th Avenue is a two-unit, two-story multi-family residential building located in the Central Richmond neighborhood, constructed in 1919 and currently owned by Wong In Fai & King Wai Lo &. The building's maintenance record shows several significant improvements, including a complete re-roofing project costing $6,500 in 2017, and the installation of a new furnace in unit 644 in early 2020.

The property has had minimal structural interventions, with two street space permits issued in 2018 and 2019, each costing $1. The building's surrounding area has experienced recurring parking issues, with three documented cases of driveway blocking between 2018 and 2023, all resulting in citations.

There have been two notable street maintenance incidents in 2015 and 2016 involving shifted construction plates and a noisy PUC manhole cover. In August 2023, there was a general service request related to a tripping hazard on a path of travel, though this was determined to have sufficient clearance. The property's infrastructure appears generally well-maintained, with no documented persistent issues, though a side sewer incident was reported in 2008 that was later deemed invalid through data cleanup processes.