731-733 18th Ave, San Francisco, CA 94121

This two-unit multi-family residential building, located at 731-733 18th Avenue in San Francisco's Central Richmond neighborhood, was built in 1923 and is currently owned by the Wong King Chen Trust. The property's most significant and concerning history centers around a 2007-2009 violation case (200790457) that revealed the illegal conversion of the ground floor behind the garage into a separate dwelling unit, resulting in multiple code violations including unapproved wiring and plumbing, lack of proper smoke detectors, inadequate emergency egress, use of unauthorized windows, and uncertainty about required fire-resistant materials.

This situation required extensive remediation work, including the removal of unauthorized fixtures in early 2008 (bathtub, kitchen, electric heaters) and the subsequent legalization of rooms at a cost of $15,000 in mid-2007, which was completed by July 2009. The building's maintenance history shows some basic upkeep work, including a street space permit issued in 2009 and a reroofing project from 1994 (though this permit has expired).

More recently, there was a sewer drainage issue reported in May 2011 involving raw sewage backups in the garage floor drain and breezeway drain, though this was resolved within four days. The property has also had several unrelated incidents recorded through 311 calls in the past decade, including parking violations (for driveway blocking and sidewalk parking) between 2019-2020, and a transit shelter platform issue in early 2024, none of which directly related to the building's condition or habitability. The last known active complaints regarding the building's condition were all resolved by mid-2009, and there have been no subsequent building code violations or habitability complaints on record.