325-327 Walnut St, San Francisco, CA 94118

The two-unit residential building at 325-327 Walnut Street in Presidio Heights is a two-story flats and duplex structure built in 1890, currently owned by the Jane Gardner Revocable Trust. The property has undergone several significant maintenance and infrastructure improvements over the past four decades, with the most substantial recent works occurring in 2010-2012 when both the water main and underground sewer main were replaced.

Earlier renovations included a 2008 repair of damaged stairs at the back of the building ($2,800), a complete reroofing in 2007 ($35,500), and various structural improvements in the early 1980s including concrete pier replacements and stair renovations. The building's maintenance history shows regular attention to structural and safety systems, though there have been some infrastructure challenges in recent years. Most notably, there are ongoing issues with a tree root lifting the sidewalk, reported in December 2020 and still marked as open.

Other recent concerns included a collapsed sidewalk identified in 2016 (which was subsequently repaired), parking enforcement issues in 2018, and a flickering streetlight in 2016. The property has experienced three smoke detector activations with no associated fires or civilian injuries, suggesting regular functioning of safety systems despite the incidents being labeled as unintentional or due to system malfunction. The building's permit history and response to maintenance issues indicate generally proactive property management over time, with most significant repairs and improvements properly documented through building permits.