826-828 Diamond St, San Francisco, CA 94114

The three-story, two-unit multi-family residential building at 826-828 Diamond Street in Noe Valley, owned by Robert Louis Caulfield, has undergone several significant improvements since its construction in 1900. The most substantial renovation occurred in 2014-2015, involving a horizontal and vertical addition that included the demolition of existing stairs and bathrooms at the rear, relocation of the second unit, and expansion of various living spaces.

This major project, costing $350,000, was followed by additional work in 2015 including foundation repairs, complete re-plumbing of three bathrooms and two kitchens, and comprehensive electrical rewiring of both units including the installation of new panels and circuits. During this period, the building also received new heating systems with the installation of an Aqua Therm furnace and updated duct systems. Earlier improvements include a facade restoration in 2005 ($40,000), which returned the building to its original appearance, and the legalization of its two existing units in 1988.

The building has a documented history of maintenance and improvements, though some older permits such as a 1996 reroofing project and a 2006 electrical upgrade have either expired or were completed long ago. The property has generated minimal complaint activity, with only two parking-related incidents recorded in 2018, neither of which directly impacted the building's residential operations. The most recent building permits and improvements indicate that the property has received significant modernization and maintenance attention over the past decade, particularly focusing on infrastructure upgrades and living space improvements.