1850 48th Ave, San Francisco, CA 94122

The two-unit residential building at 1850 48th Avenue in the Outer Sunset, owned by Kelvin H K Chow and Jani P K C, was constructed in 1946 as a two-story flats/duplex structure. The property has undergone several significant maintenance and infrastructure improvements over the past three decades, with the most notable recent work occurring in 2016, when both the main sewer line and house trap were replaced in the sidewalk and driveway, and street space modifications were made.

Going further back, a portion of the front garage header and bay received repairs in 1992. The building's maintenance history shows attention to infrastructure needs, particularly with the 2016 sewer line work.

The property has experienced typical urban maintenance issues over the years, including three streetlight-related incidents in 2013 (one burnt out and one dim light), both of which were resolved promptly, and a tree maintenance issue in 2019. More recent concerns primarily involved the public space around the building, with 311 calls regarding illegal postings in 2021 and an abandoned Christmas tree in early 2022, both of which were resolved. The building's permit and 311 call history suggests regular maintenance of both the structure and its immediate surroundings, with no recorded incidents that would significantly impact resident safety or comfort.