1660 Mason St, San Francisco, CA 94133

The three-story, 9-unit apartment building at 1660 Mason Street in North Beach, owned by the Goldfield E Ronnie Trust, has a history dating back to 1908. The most recent significant improvements to the building's safety systems were completed in 2024, including an approximately $38,000 fire alarm system upgrade to comply with current code requirements, featuring new low-frequency sounders in sleeping areas and updated devices compatible with a new fire alarm control panel.

This upgrade follows a pattern of attention to fire safety issues, with multiple violations and complaints regarding the alarm system recorded between 2017 and 2024, though all have been subsequently abated. The building has undergone various maintenance work over the years, including a $12,000 reroofing project in 2011, water service pipe installation in apartment #9 in 2014, and shower drainage repiping in apartment #7 in 2007.

Historical records from 2007 show multiple building violations related to building maintenance standards, including issues with stair repairs, fire alarm system certification, cleanliness, exit access, documentation, and utility access, all of which were resolved by January 2008. The building has also experienced some recurring maintenance issues, including water leaks, mold problems, and routine inspections, with the most recent complaints primarily focusing on fire safety systems. While recent 311 calls from 2024 have primarily concerned street cleaning and debris issues outside the building, these exterior maintenance matters are generally the responsibility of the city rather than the property owner.