5x10 storage unit cost: $65 to $130 per month

A 5x10 is 50 square feet of floor area, typically 8 feet ceiling height, giving 400 cubic feet of storage volume. That is double the volume of a 5x5 for typically 30 to 60 percent more rent, which is why the 5x10 is the most popular size in the small-unit category. The 2026 national average sits between $65 and $130 per month standard and $85 to $175 climate-controlled, based on April 2026 rate samples from Sparefoot Storage Beat plus current pricing-page data from Public Storage, Extra Space, and CubeSmart.

The same regional pattern that drives all storage pricing applies here. Public Storage's 2024 10-K reports same-store revenue per occupied square foot at the regional level. Their California portfolio runs roughly 70 percent above their Texas portfolio, which translates directly into the city bands you will see when shopping. A 5x10 in San Francisco at $164 is not facility-specific overcharging, it is the cost of land in a market with no developable storage sites, passed through.

On top of the rent, the standard fee stack applies: $15 to $30 admin fee at move-in (one-time), $10 to $20 per month mandatory insurance unless your renters or homeowners policy includes off-premises coverage, $10 to $15 disc lock at move-in, and a post-promo rate increase of 10 to 25 percent at month three to six. A 5x10 advertised at $99 with first-month-free typically settles at $115 to $145 by month four. The pattern is documented in all three large REITs' rate-management disclosures and is essentially universal.

Per square foot, a 5x10 averages roughly $1.30 against $2.40 for a 5x5 in the same facility. That economy of scale is the single biggest reason most renters who book a 5x5 should have booked a 5x10. It is also the reason 10x10 and larger units price even better per square foot, which is the reverse argument for why renters who actually have 1-bedroom apartment contents should not size down to a 5x10.

The 5x10 is the size where the math meaningfully changes. A 5x5 is closet-overflow. A 5x10 is real apartment storage. The deciding question is mattress size: a queen will fit (75 inches long lined up against the 10-foot wall), a king will not (76 to 80 inches wide, leaves no room to add anything else useful). If you have a king bed in your inventory, you are looking at a 10x10 minimum.

For two-roommate college storage, the 5x10 is also the right size most of the time. Two twin XL mattress sets plus dorm furnishings (mini fridges, microwaves, two desk chairs, two desks broken down, plus 15 to 20 boxes of clothing and books) all fit. Three roommates require a 10x10 or two separate 5x10s, and the math on which is cheaper varies by market because two units double the admin fee and double the insurance.