Extra Space Storage Inc. is a real estate investment trust headquartered in Cottonwood Heights, Utah that invests in self storage facilities.

As of March 28, 2024 the company owned and/or operated 3,714 locations in 43 states, and Washington, D.C. comprising approximately 2.6 million units 283.4 million square feet of net rentable space.

[2] It is the largest owner of self storage units in the United States[3] and the largest self storage property manager.

[4][5] Extra Space Storage has won NAREIT's Leader in the Light Award for superior and sustained sustainability efforts in 2020, 2021 and 2022.

[6] The company has solar installations at many of its properties and was listed on the "Top 25 Corporate Users by Number of Solar Installations" by the Solar Energy Industries Association.