1731 Lyon St, San Francisco, CA 94115

The two-unit residential building at 1731 Lyon Street in the Lower Pacific Heights neighborhood is a two-story flats and duplex structure built in 1902, currently owned by David C. and Barbara P.

Thomson. The building's maintenance history shows two significant permitted improvements over the past quarter-century: a complete reroofing project carried out in 1998, and more recently, a sewer repair completed in September 2021.

While the reroofing project was necessary for preserving the building's integrity, the sewer repair work completed in 2021 may be of particular note, as plumbing infrastructure issues can impact resident comfort and building systems. Since the sewer repair was performed relatively recently and completed successfully, it suggests that the building's plumbing systems have received attention, though the need for such repairs could indicate the age of the infrastructure.