1660-1664 48th Ave, San Francisco, CA 94122

The two-unit residential building at 1660-1664 48th Avenue in San Francisco's Outer Sunset neighborhood, owned by Maura Duffy, was constructed in 1991 following a series of significant modifications to the original structure. The property underwent comprehensive changes in 1989 including both horizontal and vertical additions, and a sprinkler system was installed in 1991 to enhance safety features. The building's maintenance record shows attention to structural upkeep, most notably with a $15,500 reroofing project completed in 2021.

However, there have been recurring sewer issues, with two documented sewage backup incidents (in April 2022 and most recently in January 2024) involving a 4-inch sewer vent that required attention from PUC Sewer Operations. The property has undergone regular housing inspections, with routine inspections in 1999 and 2002 showing compliance with housing standards. Recent activities around the property have primarily involved external maintenance and parking-related incidents.

In 2023, there was a service request related to an unpermitted planter box placement near the curb, and there have been several parking enforcement actions, including citations for vehicles blocking driveways and one instance of sidewalk parking in 2022. The building's historical records (dating back to 1988) show that a demolition attempt for an earlier apartment building was withdrawn, leading to the current structure's construction with documented approvals for facade changes and building additions. While the property has maintained basic safety and habitability standards, the recurring sewer issues and periodic parking challenges in the vicinity are notable aspects of the building's recent history.