659-661 5th Ave, San Francisco, CA 94118

The two-unit residential building at 659-661 5th Avenue in San Francisco's Inner Richmond district is a two-story flats and duplex structure built in 1907, currently owned by Mau Sen Ng Bypass Tr. The building's maintenance records show regular attention to the roof, with significant work performed in 2017 costing $14,950, though an earlier re-roofing project was completed in 1990.

Of particular concern is an active plumbing violation dating back to December 2003 regarding improper rainwater drainage affecting the neighboring property at 665 5th Avenue, which remains unresolved nearly two decades later. In recent years, the property has experienced numerous parking-related issues, with multiple complaints recorded between 2022 and 2024 regarding blocked driveways. While many of these incidents resulted in citations being issued, there were several cases where enforcement officers were unable to locate the offending vehicles.

Most recently, in November 2024, there were reports of a missing side sewer vent cover, though this was only recently reported and remains open. The property has also had occasional issues with hazardous materials on or near the sidewalk, with a glass-related incident reported and resolved in August 2023. The building's most recent documented work, the roof replacement, was completed in accordance with planning requirements, confirming that the work performed was limited to roof maintenance with no other modifications affecting visibility from the street.