1635-1637 Leavenworth St, San Francisco, CA 94109

The property at 1635-1637 Leavenworth Street is a two-unit, two-story multi-family residential building located in Nob Hill, constructed in 1911. The building has undergone several significant modifications over the years, including an unauthorized top floor addition in 1984, installation of a fire escape stair in 1985, and vinyl siding installation in 2000. Most notably, between 2018 and the present, there have been ongoing issues related to unpermitted construction work.

A 2018 complaint led to a permit (201807275734) being issued to remove unauthorized construction and restore the original rear wall, but an internal audit in October 2024 revealed that this work was never completed, resulting in an active violation (202430322) regarding the unremoved top floor addition. The building has experienced multiple fire-related incidents, including one building fire with one civilian injury recorded, several smoke detector activations, and a stalled elevator rescue, though most incidents involved no injuries or were related to false alarms. Recent activity at the property has included multiple 311 calls between 2023-2024, primarily regarding parking issues and street cleaning concerns, as well as some complaints about illegal parking and debris.

A significant fire incident occurred in October 2024, resulting in the response of fire personnel to address the situation. The property has also been subject to various building complaints and inspections, including a 2018 investigation into unauthorized construction work and a more recent complaint in December 2023. The history of unpermitted modifications and ongoing violations related to the unauthorized top floor addition raise potential concerns about building code compliance and safety, while the numerous fire incidents suggest potential fire safety system maintenance issues.