550 London St, San Francisco, CA 94112

The two-unit residential building at 550 London Street in the Excelsior neighborhood is a two-story flats and duplex structure built in 1964, currently owned by Ma King L. The property has undergone several significant improvements over the years, including a $60,000 basement remodeling project completed in 2001, bathroom layout revisions in 2002, window replacements in 2004, and a roofing project in 2019 costing $8,500.

The building's maintenance history shows attention to basic infrastructure, with a rear stairway repair completed in 2000 and an earlier reroofing project in 1996. Recent records from 2023-2024 indicate recurring issues with waste management, including three missed trash collection incidents in December 2023 alone, and one instance of abandoned furniture in late 2024. There have been multiple reports regarding improper waste container storage, particularly in 2012 and 2015, though these were generally resolved through inspections or notifications.

The building's exterior has experienced some maintenance challenges, with documented graffiti in 2013 and occasional street cleaning issues, including a missed mechanical sweeping in 2016. A smoke detector malfunction was recorded in the building's fire incident history, though no injuries were reported. The property has consistently met basic building code requirements, as evidenced by the completion status of all major permits issued over the years.