643 Hampshire St, San Francisco, CA 94110

The three-story multi-family residential building at 643 Hampshire Street, owned by the Patrick M Duffy Living Trust, was constructed in 1900 and contains two units. The property has undergone significant improvements and renovations over the past two decades, with major work conducted between 2005 and 2009 including comprehensive interior remodels, kitchen and bathroom upgrades, electrical rewiring, and plumbing improvements across both units.

Notable completed projects include a $120,000 renovation in 2008 that encompassed various unit upgrades and a $20,000 bathroom and kitchen remodel in 2009. The building's maintenance history shows attention to infrastructure, with records of reroofing in 1999 and foot of garage reconstruction in 2010. Recent concerns include two open 311 calls from January 2025 regarding sidewalk defects caused by tree roots and potential property damage from trees, along with three fire alarm system complaints between 2019 and 2024, all of which were marked as corrected.

The property has a history of building complaints from the 1990s, including issues with heating, ventilation, pests, and water infiltration, though these complaints were resolved and are no longer active. The most recent building permits are primarily street space permits, suggesting minimal recent construction activity compared to previous years. The extensive renovation history and regular maintenance suggest proactive property management, though the active tree-related maintenance issues in 2025 indicate an ongoing concern with vegetation impact on the property.