3412-3416 18th St, San Francisco, CA 94110

The three-unit residential building at 3412-3416 18th Street in the Inner Mission, owned by the Chu & Barbour Revocable Trust, is a three-story flats and duplex structure built in 1907. The property has undergone several significant renovations over the past decade, with the most recent major work completed in 2018, which involved remodeling unit 3412's kitchen and bathroom facilities at a cost of approximately $54,000.

Other notable improvements include voluntary foundation upgrades in 2017 ($20,000), multiple unit renovations in 2014 (including kitchen and bathroom remodels, new bathrooms, and furnace replacements costing around $35,000), and window replacements in 2012. The building has experienced several routine safety inspections, with the most concerning violations occurring between 2017 and 2024, primarily related to fire safety systems including alarm systems, sprinkler systems, and sleeping area requirements, though most have been promptly corrected.

The property has generated multiple 311 calls in early 2025 regarding graffiti on nearby infrastructure, though these are not directly related to the building's condition or safety systems. While there have been several smoke detector activations recorded by the fire department, these were primarily unintentional with no reported civilian injuries. The building's maintenance history shows regular upgrades and repairs, with most permit work being properly completed and documented, suggesting active management of the property's infrastructure and systems.