21 Coso Ave, San Francisco, CA 94110

21 Coso Avenue is a two-unit multi-family residential building located in San Francisco's Bernal Heights neighborhood, dating back to 1906. The property, currently owned by Philippe G Grandvoinet Revo, has undergone several significant maintenance and improvement projects over the past few decades. Most recently, in December 2021, the building received essential infrastructure updates with the replacement of approximately 25 feet of 4" sewer pipe in the backyard area, demonstrating ongoing maintenance of the property's systems.

In 2021, a direct vent gas fireplace was installed, adding modern amenities to the building. The building's maintenance history shows regular upkeep of critical components, including a $15,600 reroofing project completed in 2015. Historical records reveal consistent attention to safety and maintenance issues, particularly regarding the front stairs, which have been addressed multiple times through repairs in 2002 and previous attempts in the 1990s.

The property has also seen various interior improvements, including kitchen cabinet installation in 1989 and insulation work in the same year. While the building's age (117 years) and permit history show typical maintenance requirements for a structure of this vintage, there have been no recorded safety incidents or major structural concerns in recent years. The property has been mostly free of serious infrastructure issues since the significant sewer line work completed in 2021, and there are no current open permits or violations on record.