401 Duncan St, San Francisco, CA 94131

The property at 401 Duncan Street is a three-story multi-family residential building located in Noe Valley, containing two units and constructed in 1908, currently owned by Lydia W Timken. The building underwent significant renovations between 2010-2011, including a major basement conversion project estimated at $60,000 to create a 2-bedroom apartment with living room and garage, followed by additional work costing $25,000 that was ultimately performed only at the basement level.

The renovation period also included substantial infrastructure upgrades, with electrical work comprising a complete system installation with 100-amp service, multiple circuits, smoke detectors, and laundry facilities, along with plumbing improvements for hydronic heating and bathroom installations. Earlier improvements from the 1996-1997 period included structural enhancements, roof replacement, and aesthetic modifications such as a new fireplace and bay window.

Recent history of the property shows ongoing maintenance and some external issues, with multiple reports in early 2025 regarding garbage management in the vicinity, including overflowing city garbage cans and one report of human waste, with one case still marked as open. The street around the property has experienced various urban maintenance requirements, including parking enforcement actions, tree maintenance, graffiti removal, and a shared spaces violation related to crosswalk obstruction, suggesting an active urban environment with typical city challenges. While the building's major systems were modernized during the 2010-2011 renovation period, the property's recent maintenance record indicates periodic attention to external infrastructure and urban space management.