1611-1613 47th Ave, San Francisco, CA 94122

The property at 1611-1613 47th Avenue in San Francisco's Outer Sunset neighborhood is a two-unit residential building constructed in 1909, owned by David K M Chan and Winnie Lau. The two-story flats/duplex structure has undergone several significant permit applications, most notably a proposed vertical and horizontal addition filed in August 2017, which is still under review as of October 2023.

An earlier substantial modification attempt was filed in January 2008 but was ultimately cancelled. The building's electrical system was upgraded in April 2006 with the installation of a main service with two meters and two panels. The property has experienced frequent maintenance and environmental issues in recent months, particularly in 2024, with nine reports of garbage and debris on or near the property between August and December 2024.

There have also been several parking-related incidents, including sidewalk parking violations, blocked driveways, and abandoned vehicle reports, with some resulting in citations. A fire complaint was filed in November 2018 but was found to have no merit by January 2019. Additionally, an administrative permit was successfully completed in June 2019 to verify the building's two-unit residential status based on a site visit and city records.