1219-1221 18th Ave, San Francisco, CA 94122

This two-unit residential building, located at 1219-1221 18th Avenue in San Francisco's Inner Sunset neighborhood, was constructed in 1953 and is owned by Vincent and Betty Jue. The two-story flats/duplex structure has undergone several significant improvements over the years, most notably in 2001 when substantial renovations were completed to add a bedroom, playroom, laundry room, full bathroom, and storage space at a cost of $50,000.

During this same period, there was a complaint filed in January 2002 alleging unauthorized conversion from two units to three units, though this complaint was quickly addressed and marked as not active within one day. The building has seen other improvements including the installation of vinyl siding on the rear facade in 1999 and a solar energy upgrade in 2012, which included the installation of six roof-mounted solar PV modules with a total system rating of 1.416 kW.

A window replacement project from 1996, involving the installation of new windows in the living and dining rooms, has since expired. The property has maintained its compliance with building codes through proper permit acquisition for all significant modifications, with the most recent notable improvement being the green energy upgrade from 2012.