522 Oak St, San Francisco, CA 94102

This three-story multi-family residence, located at 522 Oak St in Hayes Valley, was built in 1885 and contains two units. The property has undergone several significant changes and faced various regulatory challenges over the past several years.

Most notably, between 2017 and 2021, there were violations regarding unpermitted construction work related to a basement dwelling unit conversion, which included unauthorized electrical and plumbing modifications. These issues were ultimately resolved through proper legalization in 2018-2021, including a $114,431 permit for legalization works and associated plumbing and electrical updates in 2018-2019. The building experienced multiple infrastructure improvements in recent years, including plumbing work in 2020 involving relocation of a hose bibb and kitchen modifications, as well as a completed wall furnace replacement in late 2018.

Historical records show earlier concerns from 2014-2015 regarding blocked exits and hazardous materials storage, which were addressed through violation corrections. The property has also faced some neighborhood maintenance challenges, as evidenced by multiple 311 calls in 2024 regarding garbage, debris, and sidewalk cleaning issues, though these are typical urban maintenance matters rather than building-specific problems. The building's owners have had to address several regulatory matters, including a resolved short-term rental violation in 2018, and recent plumbing modifications appear to be primarily focused on maintaining and updating existing systems rather than creating new unauthorized spaces.