3475-3479 18th St, San Francisco, CA 94110

The property at 3475-3479 18th Street in San Francisco's Inner Mission neighborhood is a two-story, 5-unit multi-family residential building constructed in 1907, currently owned by Bay Community Housing LP. The building is currently classified as Non-Compliant with the city's Mandatory Soft Story Retrofit Program, with active violations noted as recently as 2020 regarding failure to complete mandatory seismic upgrades and related monitoring fees.

The property has a history of maintenance and compliance issues, most notably an active complaint from 2017 regarding unauthorized additional dwelling unit construction in the rear garage area, which allegedly violates multiple building codes including unapproved wiring, plumbing, inadequate exits, and lack of required smoke and carbon monoxide detectors. Historical records show various safety and habitability concerns, including heating system failures (2010), roof and ceiling damage with reported rodent and mold issues (2012), and a significant tenant buyout in July 2021 involving compensation of $119,715 for 5 tenants.

The building underwent some structural work in the late '90s to address dry rot issues in floor joists and stairs, and attempted soft story retrofit work has been documented through multiple permit applications between 2017 and 2021, though most of these permits were either cancelled or renewed without completion. Recent 311 calls from late 2024 show recurring issues with garbage management around the property, though these appear to be municipal service matters rather than building-specific problems.