How big is the self storage industry?

Self storage is not a niche side business anymore. It is a multi-hundred-billion-dollar real estate sector. 

The U.S. self-storage industry is estimated at approximately $394 billion. The 2026 Self Storage Almanac also identifies 65,000-plus active facilities in the United States, more than 2.4 billion square feet, and over 3,900 known developments nationwide. That matters because scale changes how investors should think about the asset class. This is not just rows of garage doors. It is a national operating business with local demand drivers, fragmented ownership, pricing software, call handling, digital marketing, supply pipelines, and cap-rate discipline. For high-net-worth investors, the opportunity is not merely buying storage. It is buying cash-flowing businesses, that are also real estate, where operational improvement dramatically changes value immediately. Those elements have led to a lot of interest from big money, making this once small asset class one of the fastest growing.