1543-1545 Treat Ave, San Francisco, CA 94110

The three-unit, three-story multi-family residential building at 1543-1545 Treat Avenue in Bernal Heights, owned by William V. Beecher, has a complex history dating back to its 1900 construction. The property underwent significant modifications in the early 1990s, including seismic upgrades, insulation work, and the controversial conversion of a ground floor workshop into an unauthorized dwelling unit.

This unauthorized unit, converted in 2010, led to a notable violation case (201031710) that revealed multiple life safety concerns, including unapproved wiring, plumbing installations, lack of smoke detectors, and improper egress. These violations were ultimately resolved by June 29, 2010, through various permits that legalized existing fixtures and corrected the unauthorized modifications. More recent improvements to the property include the installation of solar panels in 2020 (two separate installations totaling 7.5 kW), demonstrating a commitment to sustainable energy.

The building has also been subject to multiple parking-related incidents and unauthorized vehicle reports, though these are not directly related to the building's condition or safety. A tenant buyout was recorded in 2017 for $40,000 involving two tenants, and there were also reports of illegal short-term rentals associated with both addresses in 2015, which have since been abated. The property experienced some water-related issues in 2005, with reports of leakage and mold, though this complaint was promptly resolved. Recent 311 calls from 2022-2023 primarily relate to parking and shared space concerns, which are now typical issues in urban environments.