Mini-storage units start at $28.50 for a 32-square-foot unit. Units are available up to 325 square feet and we can guarantee you'll pay a lot less than anywhere in the Denver/Boulder metro area. A to Z Storage boasts many long-term tenants, including some that have been storing with us since the beginning. This is probably due to our policy of never increasing rent on a mini-storage customer once they move in - even when price increases become necessary due to increased operating costs. Mini Storage Units Large Storage Units Inside Warehouse Space Outside Storage Car/Truck/Trailer/Semi Call for rates on whatever size you're interested in, or come on over and we'll show you around