1857-1859 Mason St, San Francisco, CA 94133

The property at 1857-1859 Mason Street is a 7-unit, 3-story multi-family residential building constructed in 1908, currently owned by 1857 Mason Street LLC. The building has undergone significant structural improvements in recent years, most notably completing a mandatory soft-story retrofit in 2019 with associated repairs totaling approximately $73,000 to comply with San Francisco building codes. Recent maintenance issues have included water damage in early 2023, with reports of ceiling leaks during rainfall, and more recent concerns about laundromat vent debris pollution on the roof in August 2023. The building has a history of violations from July 2003 related to various safety and maintenance issues, including heating problems, inadequate lighting, refuse management, and fire safety concerns, though all these violations were abated by November 2003.

More recent building updates include structural revisions in 2019 to preserve masonry basement walls and improve connections between floor diaphragms. The property has undergone regular housing inspections, with the most recent routine inspection occurring in May 2023. While there was a period of significant maintenance issues in 2003 requiring multiple corrections, recent years have shown improved compliance with building codes, particularly regarding seismic safety through the completed soft-story retrofit. Recent complaints have primarily focused on building systems and neighbor interactions rather than major safety concerns.

The building's ownership has also responded to concerns about illegal short-term rentals, with a violation being recorded and subsequently abated. The property has undergone various improvements over the years, including window replacements in 1983 and addressing street space permissions in 2006. Recent maintenance and compliance activities suggest active management of building systems and responsiveness to resident concerns, though some ongoing issues related to water infiltration and exterior debris have been noted. The completed soft-story retrofit represents a significant investment in the building's structural safety, bringing it into alignment with current seismic requirements.