731-733 40th Ave, San Francisco, CA 94121

The two-unit residential building at 731-733 40th Avenue in San Francisco's Outer Richmond neighborhood, owned by Mickey Wong and Chanjua Guo, was originally constructed in 1947 and has undergone significant safety and modernization improvements over recent years. Most notably, the building received extensive fire safety upgrades in 2021-2022, including the installation of a comprehensive fire sprinkler system throughout the property ($60,000), new fire alarm monitoring system with detectors and pull stations ($8,000), and associated infrastructure improvements. The property has seen substantial unit improvements in 2021, including comprehensive renovations of both units' kitchens and bathrooms, the addition of new bathrooms, and extension work.

Each unit received new high-efficiency furnaces (95%); unit 733 received an extension with additional bedrooms and bathroom, while unit 731 underwent similar enhancements. The building's plumbing infrastructure was significantly upgraded with the installation of new water service lines for all units in late 2022, along with backflow device replacements and associated fire service improvements. In addition to these major systems improvements, the property has seen sustainable upgrades including the installation of solar panels in 2017 (3.9kW system).

The building's maintenance and operational history has shown regular attention to infrastructure and safety systems, with all permits being completed successfully. The property has been proactive in addressing both units' modernization needs, including the recent construction of a gas meter wall and various system upgrades. While there have been 311 calls regarding street conditions and parking in the vicinity of the property, these are primarily related to public infrastructure rather than building-specific issues. The most recent building modifications and safety improvements, including the 2022 fire safety upgrades and various unit renovations, suggest ongoing investment in maintaining and improving the property.