171-173 23rd Ave, San Francisco, CA 94121

The three-unit residential building at 171-173 23rd Avenue, located in the Lake-Presidio neighborhood, is a two-story flats and duplex structure built in 1908. The property has undergone several significant renovations over the years, with particular attention to structural integrity and modernization. In 2005-2006, the building underwent important foundation work following termite inspections, including raising the foundation height and repairing support structures, alongside an electrical upgrade to a 200-amp service.

More recent improvements include comprehensive window replacement in 2012 (9 front and 14 rear windows), and substantial interior remodeling in 2009 that involved bathroom renovations, living space reconfigurations, and kitchen modifications across multiple floors. The building's maintenance history shows consistent attention to structural and safety concerns, with records indicating prior issues such as dry rot repairs in 1998 and termite-related work in 2005. Recent activity related to the property includes a 2022 Rent Board inquiry regarding unit usage and vacant unit fees, though the case was resolved.

The location has experienced several parking-related incidents in recent years, with multiple reports of driveway blocking between 2020-2024, and two abandoned vehicle complaints in 2017. While these parking issues are recurring concerns, they are external to the building's structure and systems. The property's documented history suggests proactive management with regular maintenance and improvements, though no recent major structural work has been recorded since the 2012 window replacement.