1638-1640 Union St, San Francisco, CA 94123

The three-unit residential building at 1638 Union Street in Cow Hollow, owned by the Capurro Mary A Living Trust, is a two-story flat and store structure built in 1906. The property has undergone several significant maintenance and safety improvements over the past few decades, including a complete reroofing in 2012 ($8,750), replacement of the gas piping system in 2016, and multiple window installations in the 1980s and 1990s.

A notable structural improvement was completed in 1990 with the installation of mudsill anchor bolts around the foundation perimeter, which is an important seismic safety feature. The building's recent history shows no major structural or safety incidents directly related to the property itself, although there have been two fire incidents recorded: one involving an overheated motor and another related to a false alarm activation (both with no civilian injuries).

The surrounding area has experienced regular urban maintenance challenges, as evidenced by numerous 311 calls between 2020 and 2024, primarily related to street cleaning, illegal parking, and graffiti. While these neighborhood issues do not directly impact the building's safety or habitability, they reflect typical urban conditions in the area. The most recent building-related permit activity occurred in 2019 with a street space permit, though this minor permit had an exceptionally low cost of $1.00.