5×5 storage unit vs 5×10 storage unit
A 5×5 storage unit gives 25 square feet (sq ft) and about 200 cubic feet (cu ft); a 5×10 storage unit gives 50 sq ft and 400 cu ft. Choose the 5×5 storage unit if your inventory is under 145 cu ft and you will not need access; choose the 5×10 storage unit above that, or if you want an aisle.
- +200 cu ft
- +$15–$35 / month
- $0.13 per cu ft
The difference at a glance
| Criterion | 5×5 storage unit | 5×10 storage unit |
|---|---|---|
| Dimensions | 5 ft × 5 ft | 5 ft × 10 ft |
| Floor area | 25 sq ft | 50 sq ft |
| Approximate volume | 200 cu ft | 400 cu ft |
| Usable volume | 170 cu ft | 340 cu ft |
| Medium boxes, alone | 56 | 113 |
| Typical home size | Part of one room | Studio apartment |
| Vehicle storage | No | A motorcycle, with room left for boxes |
| Standard monthly cost | $40–$75 | $55–$110 |
| Climate-controlled cost | $55–$95 | $70–$140 |
| Best for | Someone decluttering one room, storing seasonal gear, or staging a home for sale. | A studio apartment in storage, a student between semesters, or one room of a house during a renovation. |
Volumes assume an 8 ft ceiling and moderate packing density. Cost ranges are national references reviewed August 2026, not quotes.
What the extra space actually buys
Stepping from a 5×5 storage unit to a 5×10 storage unit adds 200 cubic feet of raw volume and 170 cubic feet of usable space. In physical terms that is roughly:
- 3 more queen bed sets, or
- 57 more medium boxes, or
- 3 more three-cushion sofas
The cost of that space is about $0.13 per cubic foot per month at the midpoint of the range — $15 to $35 more each month. Storage pricing is not linear, which is why sizing up is usually cheaper than people expect and renting two small units is usually dearer.
The practical threshold: a 5×10 storage unit brings studio apartment into range, which a 5×5 storage unit cannot hold.
When to choose the 5×5 storage unit
- Your inventory comes in under 153 cu ft — that is the 90% line where a unit stops being comfortable.
- You will load it once and not return until you empty it.
- You are storing for three months or less, where the monthly saving still matters.
- Someone decluttering one room, storing seasonal gear, or staging a home for sale.
When to choose the 5×10 storage unit
- Your inventory is above 153 cu ft, or you are not sure — uncertainty is itself an argument for the larger unit.
- You need an access aisle. A 15% aisle drops a 5×5 storage unit to 145 cu ft, which is often the whole reason people outgrow it.
- You are storing for a year or more, where one repack costs more than the price difference.
- A studio apartment in storage, a student between semesters, or one room of a house during a renovation.
The honest trade-off
The mistake is treating this as a price comparison. Over twelve months the difference is $180 to $420. The cost of getting it wrong in the other direction is a second rental, a second move of everything you already carried once, and in the worst case a booking on a Saturday when the facility has nothing left in your size.
Against that, the argument for the smaller unit is real and often ignored: a unit you fill completely is cheaper per cubic foot, and an over-sized unit tends to fill with things you would otherwise have thrown away.
The deciding number is your own volume. At 5 ft deep, anything longer than about 6 ft has to go in diagonally or on its end. Sofas and dining tables are usually the deal-breaker.
If you want to see the two loads rather than reason about them, worked inventories for a 5×5 and worked inventories for a 5×10 list worked inventories for each. The the five-step sizing method covers the method behind the 90% line used above, and what each size costs per month shows where both sizes sit on the price curve.
Work out your own number
Related questions
Is a 5×10 storage unit worth the extra cost over a 5×5 storage unit?
It is if your inventory is above 153 cu ft, or if you need to walk into the unit. The extra 200 cu ft costs about $15–$35 more per month, which works out at roughly $0.13 per cubic foot.
How much bigger is a 5×10 storage unit than a 5×5 storage unit?
100% more volume: 400 cu ft against 200 cu ft, and 50 sq ft of floor against 25 sq ft.
Should I rent two 5×5 storage units instead of one 5×10 storage unit?
Rarely. Two 5×5 storage units cost $80–$150 against $55–$110 for the single larger unit, and you get two doors, two locks and two trips. The exception is when you need frequent access to one half and not the other.
Can I downsize from a 5×10 storage unit to a 5×5 storage unit later?
Yes — month-to-month leases are standard, and facilities will usually move you internally. Budget half a day for the transfer, and be realistic about whether you will actually purge 170 cu ft of belongings to make it fit.