51-53 Beaumont Ave, San Francisco, CA 94118

The property at 51-53 Beaumont Avenue is a 1-story, two-unit multi-family residential building constructed in 1900, currently owned by Diane Kwan. The building has a documented history of unauthorized modifications and subsequent compliance efforts, with the most recent significant activity occurring in December 2023 when permits were filed to legalize a rear horizontal expansion and existing first-floor unit, along with fire sprinkler installation throughout the structure. Earlier in 2023, the building received multiple violation notices for unpermitted construction, including the installation of a bathroom and kitchen on the ground floor and unauthorized renovations to second-floor kitchen and bathroom facilities.

These violations followed previous concerns in 2020 involving unauthorized partitioning and electrical work, suggesting a pattern of construction activity exceeding permitted scope. The building's recent history has been marked by multiple enforcement actions, with the most serious current violation remaining active as of June 2023, regarding unauthorized construction work. Planning records indicate an effort to legalize rear ground floor additions and unauthorized dwelling units, including a state ADU, under California's accessory dwelling unit provisions.

The property has experienced several infrastructure and maintenance issues over the years, including underpinning work in 2000 and various complaint responses between 2010 and 2022 regarding potential abandonment, garage usage concerns, and unauthorized modifications. Recent noise-related complaints were filed in 2024. A notable pattern of construction without proper permits is evident, with multiple corrective actions being taken, as shown by the sequence of permits filed between 2020 and 2023, including kitchen and bathroom remodeling, electrical upgrades, and attempts to address various violations through proper legalization processes.