1146-1148 Leavenworth St, San Francisco, CA 94109

The two-unit residential building at 1146-1148 Leavenworth Street in San Francisco's Nob Hill neighborhood is a 2-story flats and duplex structure built in 1908, currently owned by David & Mary Alice Basso Re. The building's history reveals several significant events regarding unit configuration and safety compliance. Most notably, in 2021, there was a building complaint regarding a possible unpermitted third unit with a full kitchen on the lowest floor, though this concern was marked as not active by October 2021.

In 2009, the property underwent essential safety upgrades to address violations, including electrical work, plumbing improvements, and water heater modifications, all of which were completed. Earlier renovations date back to the 1980s, including kitchen and bathroom remodeling (1983), interior work (1988), and structural improvements (1984). Two attempts to convert guestroom and storage spaces into a third unit (2002) were cancelled, and a reroofing project from 1996 is noted as expired.

The building's recent maintenance history shows several 311 calls between 2018 and 2023, primarily related to street cleaning issues around the property, including reports of loose garbage. However, these external maintenance issues are not uncommon in urban environments and were all marked as resolved. Planning records indicate prior applications for condo conversions and parking variances for the converted ground floor unit, both of which were approved, suggesting that the building has undergone formal conversion processes with appropriate regulatory oversight. The property's documented history reflects a structure that has received various upgrades and modifications over the years, with particular attention to safety compliance in more recent years.