757 Bacon St, San Francisco, CA 94134

The two-unit multi-family residential building located at 757 Bacon Street in the Portola neighborhood, owned by Kelvin Y Wong, has a documented history of unauthorized construction and permit violations spanning back to 2004 and most recently in 2024. The 1910 flats/duplex structure has experienced recurring issues with unauthorized deck modifications, including a current active violation from June 2024 regarding an improperly enclosed rear deck and unpermitted stairs installation, which follows a similar pattern as a 2004 incident that resulted in a completed permit to remove illegal enclosures (2004-1206-0777).

The building's history also includes a completed reroofing project from 1991, and notable enforcement actions from 2004 that addressed several unauthorized construction attempts, including an illegal rear addition measuring approximately 6' x 12'. The property has generated multiple 311 calls in early 2025, primarily related to parking violations and debris issues, with several resolved citations for illegal parking and sidewalk use. While these recent incidents indicate some neighborhood maintenance challenges, they are external to the building itself.

A 2005 fire complaint regarding weeds and grass was ultimately found to have no merit. The building is subject to ongoing monitoring fees under San Francisco Building Codes, reflecting its history of permit non-compliance. The owner's recent permit filing in October 2024 appears to address previous violations, though the status remains filed as of October 2023.