21-23 Park Hill Ave, San Francisco, CA 94117

21 Park Hill Avenue is a two-unit, two-story multi-family residential building constructed in 1904, currently owned by Adsanathan Kansinee & Jung. The property has undergone substantial renovation work since 2020, though much of this work has been marred by permit violations and complaints. Significant unauthorized work was conducted in 2020, including the gutting of multiple bathrooms and a kitchen on the ground floor, leading to violation complaints that were not fully resolved until October 2021.

The property has also faced multiple active complaints regarding unauthorized work beyond permitted scopes, including the unauthorized installation of new windows in 2021 and concerns about excessive modifications to dormers in 2023. Several building permits related to substantial remodeling work have been issued or cancelled since 2020, including attempts to convert the attic to habitable space and add a roof deck. Most recently, in May 2024, a complaint was filed regarding the building being boarded up since 2020 and appearing abandoned, though this case was quickly marked as resolved.

The building's renovation history has included multiple roof replacement projects, extensive interior remodeling of both units, and various plumbing and electrical upgrades. A notable safety incident occurred in 2015 involving electrical work following a fire, which was completed successfully. The property has generated numerous 311 calls in recent months, primarily related to garbage and debris issues around the property, though these are likely due to external conditions rather than building-specific problems.