Extra Space Storage is the largest operator of self storage facilities and the largest third-party self storage management company. Extra Space Storage – McKinnon is a one-of-a-kind +/- 120,000 sf mixed-use development combining industrial and self-storage in San Francisco, the nations most undersupplied self-storage market.  This mixed-use building combines ground floor light industrial space with four stories of self-storage above. The project represents a significant milestone as the first purpose-built self-storage facility approved in the city in nearly 20 years.