78-80 John St, San Francisco, CA 94133

The two-unit residential building located at 78-80 John Street in Nob Hill, owned by the Shem/Liao Family Trust, is a two-story flats and duplex structure built in 1946. The property has undergone several significant improvements over the past decade, most notably a major renovation in 2014 that included the addition of a bedroom and half-bathroom, bathroom remodeling, and the installation of three furnaces on the ground floor, along with electrical updates for a basement playroom and new systems.

The building has also received attention to basic maintenance and infrastructure, including a reroofing project completed in 2018, and a kitchen remodel on the second floor completed in 2013, with all work being properly permitted and recorded. The property has experienced some notable service issues, particularly in 2019, when there was a series of sewage-related incidents including multiple backups, flooding, and vent issues that required significant attention from PUC Sewer Operations. These problems appeared to be centered around the building's sewer lateral system, as evidenced by multiple work orders and customer callbacks, though there is no record of ongoing sewer problems in recent years.

Earlier infrastructure work was conducted in 2002 to address soil voids and compaction issues following a water main rupture. The building's maintenance record shows regular upkeep, though potential residents should be aware of the property's historical plumbing and sewer challenges, which appear to have been resolved based on the absence of recent similar incidents. The most recent infrastructure work was the 2018 roofing project, suggesting periodic maintenance is being performed when necessary.