10x20 storage unit cost: the 2-car garage size

A 10x20 is 200 square feet, at 8 feet of ceiling in an indoor unit and often 10 to 12 in a drive-up built for vehicle access, so somewhere between 1,600 and 2,400 cubic feet of usable volume. There is no national price for it and no free public dataset that would let anyone publish one.

At this size, three things move the quote, and the order surprises people. Door type comes first. A drive-up unit is a roller door on an exterior wall with no climate plant behind it, cheaper to build and cheaper to run, and it is almost always the keener of the two prices at the same site. An indoor 10x20 is usually climate controlled by default and priced accordingly. That fork is a bigger swing than most people expect and it is invisible in any national average, which is one reason a national average for this size was never worth much.

Land comes second: the ground under the facility is the biggest input cost in the rent, which is why the same 200 square feet differs several times over between a coastal metro and an inland one. Unit size comes third, and it works in your favour. The fixed costs of a unit, one door, one lock, one light, one stretch of aisle, plus its share of security and administration, land once per unit and do not scale with the floor. So the rate per square foot falls as units get bigger, and the 10x20 sits well down that curve. It is a much better buy per square foot than two 10x10s, and the gap widens once you count the second administration charge and the second lot of cover.

The one rent figure here you can check for free comes from an annual report rather than a listing page. Public Storage's Form 10-K, FY2025 (filed 12 February 2026, period ending 31 December 2025) reports realized annual rent of $22.54 per occupied square foot across its Same Store Facilities, at 92.0% average occupancy. Do not multiply it by 200. It blends every unit size and market the company operates in, and large units sit below that blend, so the arithmetic overstates a 10x20.

Three use cases dominate the 10x20. First, residential moves of 3-bedroom apartments or partial 3-bedroom houses: the size takes a full furniture inventory plus 50 to 60 boxes with room to walk down the centre. Second, single-vehicle storage with secondary boxes or seasonal items, where a typical sedan plus 30 boxes plus skis and bikes fits comfortably. Third, small-business inventory for sellers shipping out of a unit, where a 10x20 holds roughly 200 to 300 SKUs of small-parcel goods on shelving.

For longer renovations of three to nine months, where the contents of a 1,500 to 2,000 sqft single-family home have to go somewhere, the 10x20 is the default recommendation. Above about 2,000 sqft of house, look at a 10x25 or 10x30: the extra floor is bought at the flattest part of the per-square-foot curve, so the step up is cheap relative to the space it adds.

For RV or boat storage, a 10x20 is at the small end. A class B camper van or a small bass boat on a trailer will not always clear it, and a class C motorhome (typically 22 to 30 feet) will not. For those, see vehicle storage or step up to a 10x25 or 10x30.