1327-1329 Mason St, San Francisco, CA 94133

The 12-unit, 4-story multi-family residential building at 1327-1329 Mason Street in Nob Hill, owned by the Raymond & Ida Chan Family Trust, was constructed in 1927 and has undergone numerous significant improvements over the years. Most recently, in late 2023, the property commenced conversion of ground floor space into a wine bar, including installation of various sinks, with associated plumbing and electrical work continuing into 2024.

The building completed mandatory soft-story seismic retrofitting in 2018, which included both residential and commercial components, demonstrating compliance with San Francisco's seismic safety requirements. Between 2011-2017, substantial unit upgrades were performed, including complete renovations of units 101, 104, 301, and 302, encompassing kitchen and bathroom remodels, electrical rewiring, and heating system replacements. The building has maintained compliance with safety regulations, though it faced several violations in 2000 related to fire safety and structural maintenance, including issues with combustible storage, fire extinguishers, stairs, and egress obstructions; all of these violations were abated by February 23, 2000.

A "Soft Story Tier 3" complaint was filed in 2017 regarding unfiled permits, but this was resolved by September 2019 when the building's Tier 4 status was confirmed as "Work Complete, CFC Issued." The property's infrastructure has seen consistent upgrades, including a 400A service installation with individual meters for residential and commercial units in 2011, and various maintenance works suggesting active management. Regular routine safety inspections have been conducted, with the most recent significant improvements focusing on both residential unit modernization and commercial space conversion. The recent change of use to a bar with associated improvements indicates ongoing investment in the property's adaptation to current use trends while maintaining its residential components.