285-289 11th Ave, San Francisco, CA 94118

The two-unit residential building at 285-289 11th Avenue in San Francisco's Inner Richmond district is a 2-story flats and duplex structure built in 1905, currently owned by Adam C Chau. The property has undergone several significant renovations over the years, with the most recent major work being a comprehensive bathroom remodel in 2018 that included both plumbing and electrical updates in the upper unit, costing approximately $20,000.

The building's maintenance history shows attention to basic upkeep, including a completed reroofing project in 2013 costing $5,000, though several proposed projects have been cancelled, including a 2010 plan for a three-story single-family residence in the rear and a 2009 plan to upgrade fire safety features and convert non-conforming living space to garage use. The property has experienced some concerning safety issues in the past, though these have generally been addressed.

A 2003 violation was filed regarding an unauthorized rear yard structure, which was abated within two months. More notably, a 2004 complaint was filed about an unpermitted "makeshift fire escape" blocked by flammable materials, and a 1999 complaint reported concerns about a rickety back staircase, inadequate egress, and various maintenance issues including window problems and electrical concerns, though all these complaints were resolved and marked as not active. The building has required several street space permits and sidewalk permits over the years, most recently in 2013, suggesting ongoing attention to exterior maintenance and compliance.