431-433 11th Ave, San Francisco, CA 94118

The two-unit residential building at 431-433 11th Avenue in San Francisco's Inner Richmond neighborhood is a two-story flats and duplex structure built in 1900, currently owned by Michael Xu and Xue Zhang. The property has undergone several significant improvements over the past few decades, including a complete reroofing project in 2002 costing $2,700, a substantial kitchen and bathroom remodeling with half-bath addition in the same year valued at $20,000, and comprehensive bathroom renovations with wall updates in 1992.

In 2006, there was an attempted but ultimately cancelled project to add a third-floor penthouse and expand the building horizontally at the rear and side. The building's service history shows relatively minor parking-related issues in recent years, with multiple reports of vehicles blocking driveways between 2022 and 2025, though these were promptly addressed by parking enforcement.

Other incidents include a garbage and debris report in 2024 regarding an abandoned refrigerator and an illegal posting case in 2016. The only recorded fire-related incident was a false alarm, with no civilian injuries reported. While the building has maintained basic compliance with city regulations, the cancelled 2006 expansion project suggests there may have been some limitations or challenges with regard to the building's permitted dimensions at that time.