2421-2423 Folsom St, San Francisco, CA 94110

The two-unit residential building at 2421-2423 Folsom Street, located in San Francisco's Inner Mission neighborhood, is a two-story flats and duplex structure built in 1900, currently under the ownership of Maxwell Lewis Life Estate. The building's maintenance and improvements record spans from 2000 through 2017, showing several significant upgrades to infrastructure systems.

Most notably, in July 2017, the building underwent a sewer line replacement on its exterior, addressing critical plumbing infrastructure. Earlier improvements include the conversion from overhead to underground electrical service in November 2004, enhancing electrical safety and reliability. The plumbing system received attention in March 2008 with the replacement of a 50-gallon gas water heater.

Two roofing projects were initiated in October 2006, costing $6,000 each, though these permits are listed as expired. The property was also maintained through sidewalk repairs in May 2000, with no associated costs noted on the permits. While the building's record shows regular maintenance and upgrades, the expiration status of some permits may warrant verification of completion status for these specific projects.