450 11th Ave, San Francisco, CA 94118

The two-unit residential building at 450 11th Avenue in San Francisco's Inner Richmond district, owned by Liu Jeanne Cheng, was constructed in 1999 following the demolition of a previous single-family dwelling in July 1997. The new structure, a two-story flats and duplex building, was built with a cost of $357,000 and completed two years after the initial permits were obtained in 1997.

A roof replacement project from 1994 had expired prior to this construction. Over its history, the building has experienced several maintenance and regulatory issues, including a 2019 complaint about a garbage enclosure built too close to the property line, and a 2001 incident involving an allegedly unauthorized basement apartment that was quickly resolved within three months. The property has generated numerous 311 calls in recent years, primarily concerning vehicles parking on the sidewalk between 2020 and 2022, with at least two citations issued during this period.

An environmental health complaint was recorded and transferred to the Department of Public Health in August 2020, though the specific nature of this complaint was not detailed in the records. While there was one recorded building fire incident, it was categorized as unintentional with no civilian injuries reported. The building's historical records show a complete and proper transition from the old structure to the current two-unit configuration, with all necessary permits obtained and completed, though some of these permits required minor revisions during construction.