3900-3922 21st St, San Francisco, CA 94114

The three-unit multi-family residential building at 3900-3922 21st Street in the Eureka Valley/Dolores Heights neighborhood, owned by Dominic Byrne, has undergone significant renovations and experienced several concerning incidents in recent years. Built in 1910, the property has seen substantial improvements since 2018, including window replacements, electrical upgrades, and various remodeling projects. The most notable recent work occurred in 2022-2023, with the removal of a load-bearing wall, extensive kitchen and bathroom renovations, and electrical system upgrades including a 200-amp service installation.

However, these improvements were accompanied by serious violations, including an active building violation from June 2022 regarding unauthorized extensive demo and foundation work, and multiple complaints about construction without proper permits. A tenant buyout of $27,000 for three tenants at 3924 21st Street occurred in July 2022, coinciding with the period of unpermitted renovation work. The building's permit history reveals a pattern of substantial investment in improvements, including recent work on the front entrance, side yard landscaping, and window replacements in 2023 and 2022 respectively. Historical permits show earlier upgrades including bathroom remodeling in 2007, window replacements in 1999, and reroofing work in 1990-1992.

The property has faced various compliance issues over the years, including unauthorized construction work (2009), bathroom and kitchen modifications without permits (2009), and paint removal violations (2009). Recent 311 calls between 2024 and 2023 primarily relate to parking issues, graffiti, and debris management on or near the property. A single fire incident was recorded with no civilian injuries, categorized as an unintentional alarm transmission. While the building has received substantial improvements through various permits, the active building violations and history of unpermitted work raise concerns about compliance with building codes and regulations.