143-147 Duboce Ave, San Francisco, CA 94103

The 4-unit, 2-story apartment building at 143-147 Duboce Avenue, built in 1922 and currently owned by Sharon S Borstad & Martin L, has been undergoing significant modifications in recent years, particularly regarding the creation of an Accessory Dwelling Unit (ADU) on the ground floor behind the garage. This renovation, initiated in March 2023 at a cost of $165,736, was prompted by the discovery of an existing illegal unit and is being constructed under Government Code Section 65852.2. The building has received permits for critical safety improvements, including the installation of a new fire sprinkler system throughout the ground floor in December 2024, which will consist of 23 heads and a 2-inch underground fire service, totaling approximately $19,600 in work.

The property has a history of code compliance issues, particularly regarding unauthorized modifications. In 2022, multiple violations were documented, including unpermitted electrical work, bathroom installations, and plumbing modifications. These violations, which remain active, involved unauthorized construction of a bathroom in the garage, installation of a toilet in a storage room, and creation of a basement unit with unapproved fixtures and appliances.

Previous building violations from 2003 included issues with expired fire extinguishers, improperly vented water heaters, and general maintenance concerns, all of which were abated. Planning records show that the current ADU project is being managed by ADApt Dwellings and has received appropriate permits, suggesting an effort to regularize and improve the building's compliance status. Recent plumbing and electrical permits filed in August 2024 indicate ongoing renovations of the bathrooms and kitchen, presumably related to the ADU project, including replacement of fixtures and finishes.