1451-1453 20th Ave, San Francisco, CA 94122

The two-unit, two-story residential building at 1451-1453 20th Avenue in the Central Sunset neighborhood, owned by Henry & Diana S Chiang Trust, was constructed in 1945 and is classified as a Flats & Duplex building. The property underwent significant renovations in 2018 following multiple violations related to unpermitted construction, particularly concerning kitchen and bathroom remodeling in the upper unit. These violations, filed in April 2018, included reports of improper debris disposal, including moldy materials, and led to the issuance of violation #201861151, which was ultimately abated by July 31, 2018.

The remediation work, costing $20,000, completed in May 2018 included replacement of kitchen countertops, cabinets, sink, bathtub, wash basin, floor tiles, wall tiles, and related electrical work including seven light fixture replacements and one bathroom outlet installation. The building's maintenance history shows an earlier reroofing project completed in 1995. Between 2015 and 2024, there have been various municipal service calls to the address, primarily relating to street maintenance and parking issues.

These include multiple instances of sidewalk parking violations in 2016-2024, two reports of hazardous materials (glass) in 2015-2017, and several street cleaning requests. While these peripheral issues don't directly affect the building's condition, they do provide context about the property's immediate surroundings. The most recent building-related permits or violations appear to be from 2018, indicating no major building modifications or issues have been recorded in the past five years.