489 Corbett Ave, San Francisco, CA 94114

The two-family residential building at 489 Corbett Avenue, owned by Knox Paul Matthew & Yuen Ca, was constructed in 1975 in the Clarendon Heights neighborhood. The property has undergone several significant modifications and experienced notable incidents over the years. Most recently, a substantial construction project was proposed in 2021, seeking to add 505 square feet to the fourth floor, along with a 147-square-foot addition to the third floor, new windows, decks, and a staircase connection between floors. This permit remains filed as of October 2023.

The building faced a serious incident in July 2016 when a vehicle struck the garage door and entry wall, causing extensive damage that required emergency response from the San Francisco Fire Department and temporary shoring of the garage header. The garage was subsequently repaired in late 2016 at a cost of nearly $10,000. The property has a history of compliance issues and safety concerns, including an unauthorized fence construction in 2018 that was reported as structurally unstable and cosmetically intrusive, though this violation was eventually abated. Unauthorized plumbing work was also reported and addressed in January 2018.

Two minor fire incidents were recorded, involving water/steam leaks and EMS response, neither resulting in civilian injuries. Recent activity at the property has mostly involved external infrastructure issues, with multiple reports of illegal parking and driveway blocking near the property throughout 2024, as well as some graffiti and pavement defects in the vicinity. Building inspections have been regular, with reports from 2022 indicating no unauthorized dwelling unit (UDU) was found during screening. The most recent 311 calls for the property area primarily related to street maintenance and public works rather than building-specific issues, with one ongoing pavement defect case reported in May 2023.