644-646 45th Ave, San Francisco, CA 94121

The property at 644-646 45th Avenue in San Francisco's Outer Richmond neighborhood is a two-unit, two-story multi-family residential building constructed in 1910, currently owned by Silvana D Messing.

The building's recorded history shows one significant renovation project from 2001, which was completed successfully and involved comprehensive updates including rewiring, replumbing, insulation improvements, interior painting, installation of new kitchen cabinets and countertops, floor renovations, and new light fixtures, with a documented cost of $10,000. An earlier permit application from March 2000 proposing the construction of a third story to the existing two-story structure was ultimately canceled and appears not to have been pursued further.

The building's permit history suggests that while significant improvements were made in 2001, no major structural changes have occurred since, and there have been no recorded safety incidents or complaints in the available data. The comprehensive nature of the 2001 renovation indicates that many of the building's core systems were modernized at that time, though no recent improvements or maintenance records are available in the provided data.