263-267 Frederick St, San Francisco, CA 94117

The three-unit multi-family residential building at 263-267 Frederick Street in Buena Vista Park, owned by the Pyne Family Trust, has a complex history dating back to its 1906 construction. The building has undergone several significant modifications and faced multiple regulatory challenges, most notably an active violation from 2006-2012 concerning an unauthorized ground floor dwelling unit that was found to have numerous safety deficiencies, including inadequate fire resistance, unapproved electrical and plumbing work, poor ventilation, insufficient heating, and inadequate emergency exits.

This violation process revealed unauthorized modifications that attempted to convert the property from its original R-1 classification. Other notable interventions include three separate kitchen and bathroom renovation projects in the 1990s-2000s, with one from 2004 resulting in a building violation for unpermitted work, and multiple street space permits in 2012 and 2014.

The building experienced a heating system problem in the 1994-1995 period and has had various maintenance issues documented through 311 calls, though all recent calls from 2023-2024 primarily relate to external matters such as graffiti removal and sidewalk cleaning, rather than building-specific issues. A recent carbon monoxide detector activation was investigated with no CO levels found. The property's current status appears relatively stable compared to its past, with no active building violations or major recent complaints about the building's systems or modifications.