542 Mason St, San Francisco, CA 94102

The 32-unit residential building at 542 Mason Street, constructed in 1914, has experienced numerous maintenance and safety issues over its history, with significant concerns emerging in recent years. Most notably, in December 2023 and December 2024, the property received multiple fire code violations, including issues with emergency lighting, exits/fire escapes, and a sleeping area requirement that remains open as of October 2023. Recent residency concerns include an October 2024 complaint about an unauthorized ventilation system for deep frying equipment in a restaurant unit.

The building has a documented history of infrastructure maintenance, including a 2017 boiler replacement, a 2011 reroofing project, and several plumbing and electrical upgrades. Multiple fire safety violations were documented between 2021-2024, including problems with alarm systems, elevator functionality, and various fire code requirements. The building has experienced recurring issues with its hot water system, documented in a 2008 complaint about insufficient hot water, though subsequent inspections show the problem was addressed.

Multiple routine inspections have been conducted over the years, with varying degrees of compliance and correction noted. Recent violations (2024) specifically cited issues with commercial cooking equipment and fire safety systems, while earlier violations from 2000-2008 included problems with heating, water temperature, and various safety systems that have been resolved. The property's maintenance history shows regular attention to basic systems, but the recent pattern of fire safety violations and unpermitted modifications suggests ongoing challenges with building code compliance and safety systems maintenance.