4337-4339 18th St, San Francisco, CA 94114

The two-unit residential building at 4337-4339 18th Street in the Eureka Valley/Dolores Heights neighborhood, constructed in 1888, has undergone several significant modifications and faced multiple compliance issues over its history. Recent improvements include the installation of solar panels in 2022, with two separate permits showing a combined system capacity of approximately 10.43 kW.

The building has a documented history of unauthorized modifications and compliance issues, particularly in the late 1990s, when there were multiple complaints about illegal unit conversions and construction, including unauthorized attic modifications, third-floor living spaces, and backyard encroachment issues. These complaints led to several permits being issued for compliance work, including the removal of illegal uses in 1999 and the legalization of skylights in 1997. More recent infrastructure work includes a sewer line housetap installation completed in 2009, and in 1989, a garage door installation was completed.

The property has experienced recurring parking-related issues in recent months, with numerous 311 calls (ten in total between October 2024 and January 2025) regarding driveway blocking and sidewalk parking concerns, though enforcement officers were often unable to locate the offending vehicles, with only two documented citations issued. While many historical compliance issues have been resolved through proper permitting, the recent spate of parking violations indicates ongoing challenges in the immediate vicinity. The building's documented history shows a pattern of addressing unauthorized modifications through the proper permitting process, culminating in recent sustainable improvements such as the solar panel installations.