416 12th Ave, San Francisco, CA 94118

The 416 12th Avenue property is a two-unit, two-story multi-family residential building constructed in 1915, currently owned by Randall Choy and Jiali Zeng in San Francisco's Inner Richmond neighborhood. The building has undergone several significant renovations and faced multiple challenges over the past decades. Most critically, in May 2020, a serious complaint was filed regarding black mold, rotting walls and windows in the top apartment, which had reportedly been painted over.

The property has also experienced recurring plumbing issues, with three documented sewage backup incidents in 2014-2015 and significant plumbing work carried out in 2010 including drainage improvements and bathroom renovations across multiple floors. In 2017, the building faced a violation regarding an unpermitted room constructed in the garage space, which was subsequently removed in 2018 to comply with fire department requirements. The building's maintenance history shows regular upkeep, including a roof replacement in 2017 and various electrical and plumbing upgrades in 2010 such as a 200-amp service upgrade and the replacement of water heaters.

However, the property has experienced some concerning issues, including the illegal construction of a garage unit (subsequently addressed), multiple sewage problems, and reports of water piping noise in 1997. Recent routine matters have included typical urban issues such as parking violations, street lighting maintenance, and graffiti removal, which were promptly addressed by city services. The building's ownership has maintained compliance with most city orders since 2017, though the mold issue reported in 2020 remains a notable concern in the property's recent history.