515-517 4th Ave, San Francisco, CA 94118

The two-unit residential building at 515-517 4th Avenue in San Francisco's Inner Richmond district is a two-story flats and duplex structure built in 1914, currently owned by Lee Sun Hong & Bik Ching Rev. The property has undergone several significant modifications and faced numerous regulatory challenges over the past decade.

Most notably, in 2015, the owners undertook a $16,000 project to legalize an unauthorized dwelling unit by adding a kitchen, which was completed under the city's Unit Legalization Ordinance 43-14. In 2020, there were two complaints filed regarding potentially unpermitted plumbing work in the basement, though these cases are currently listed as not active. The building's permit history also includes street space permits issued in 2014 and 2020, and historical records show a party room was created behind the garage in 1986.

Recent activity around the property has been predominantly related to external maintenance issues, with multiple 311 calls in 2024 concerning garbage, debris, and hazardous waste on the street and sidewalk areas. There have been several parking-related incidents near the property, including multiple cases of driveway blocking and illegal parking between 2021 and 2024, though these were generally addressed through enforcement actions. The most recent permit in 2015 for unit legalization and the 2020 street space permits remain the most significant modifications on record, with no major structural changes or improvements noted in recent years.