1658 11th Ave, San Francisco, CA 94122

The two-unit residential building at 1658 11th Avenue in San Francisco's Inner Sunset neighborhood, owned by John and Frances Porter Trust, has been standing since 1968 and has experienced several significant maintenance events over its lifetime. The property has undergone three major roofing projects, with the most recent completed in 2022 at a cost of $28,000, and previously in 1993.

Window replacements were performed in 2004, and in 1989, the rear two-level deck was substantially rebuilt using a post-and-beam structure. Of particular concern is a recent pattern of sewer-related incidents, with three separate sewage back-up discharge cases reported in October 2024 alone, two of which involved side sewer vents. These recurring sewer problems suggest ongoing infrastructure challenges.

The building has experienced periodic neighborhood issues, including two instances of illegally posted materials (in 2021 and 2015), a parking enforcement matter in 2020, and a public works service request in 2024, though these are more reflective of neighborhood conditions than building-specific problems. A fire-related complaint was logged in June 2012 but was resolved within four days with conditions reportedly corrected. The property's maintenance record shows regular upkeep of major systems, particularly roofing, though the recent sewer issues may warrant monitoring.