639-641 Oak St, San Francisco, CA 94117

The property at 639-641 Oak Street is a two-unit, two-story multi-family residential building located in Hayes Valley, built in 1900 and currently owned by Adam Baas. The building underwent significant renovations between 2012-2013, including comprehensive kitchen and bathroom remodels in multiple units, window replacements on both the second and third floors, and various electrical and plumbing upgrades. Notable improvements included a new 200-amp electrical service with two meters and extensive plumbing work including bathroom renovations, kitchen remodeling, and sewer/water pipe replacements.

A non-load bearing wall was also modified in 2013, with a total renovation investment exceeding $30,000. The property has experienced several urban maintenance issues in recent years, with the most significant recent incident being a 2023 report of offensive graffiti. Between 2019-2022, there were multiple 311 calls related to street cleaning and sidewalk maintenance, including reports of loose garbage, medical waste (needles), and an illegal parking complaint.

While these neighborhood issues have largely been addressed through standard city processes, they highlight the building's urban location challenges. A notable planning record indicates a proposal to convert the building from three units into condominiums, though the current configuration is listed as two units. The most recent permit activity was recorded in 2013, suggesting that major construction work has not occurred in the past decade, which is typical for completed renovation projects of this scale.