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1 A 5x5 foot storage unit usually runs about $40-$50 per month. 2  10x15 foot units cost $75-$140 per month or $115-$150 for a climate controlled space. 3  A 10x20 unit ranges from $95-$155 per month or $170-$180 for climate controlled. 4  20x20-foot spaces rent for about $225 per month.
When you look for self-storage units, you'll need to consider how much space you'll need, how long you'll need to rent the unit, and what amenities are important to you. Typical Costs for Renting a Self-Storage Unit. You can rent a mobile storage unit for approximately $200/month if that's what you need.