646-648 6th Ave, San Francisco, CA 94118

The two-unit residential building at 646-648 6th Avenue in San Francisco's Inner Richmond neighborhood is a 2-story flats & duplex structure built in 1911 and currently owned by the Lin Heng Ng Bypass Trust. The building's maintenance history shows several permitted repair work, including a significant front stair repair project in 2006 costing $5,500 that involved concrete work with a granite finish.

Two older permits from the 1990s indicate some interior improvements, including drywall work in the garage (1991) and aluminum window installation (1990), though both of these permits have since expired. The property has experienced multiple parking-related incidents over the past several years, with several reports of abandoned vehicles (2015-2016) and parking violations, including blocked driveways and sidewalk parking (2016-2021).

While most of these cases were resolved relatively quickly, typically with vehicles being gone upon inspection or the cases being closed as invalid, they do suggest an ongoing parking concern in the immediate vicinity. A recent maintenance issue was documented in 2021 involving illegal postings on property lines, though this was promptly resolved by the Department of Public Works. The building's documented history shows regular maintenance work being performed, with no recorded violations related to building safety or habitability.