Storage unit size for a car
A car needs at least a 10x20 storage unit. Compact cars fit a 10x15 with almost nothing to spare, while full-size sedans, SUVs and trucks need a 10x20 or larger. The door width matters as much as the unit length.
Size guide
| What you are storing | Unit size |
|---|---|
| Compact car (under 15 ft) | 10x15 minimum, 10x20 comfortable |
| Mid-size sedan (15–16 ft) | 10x20 |
| Full-size SUV or truck (17–20 ft) | 10x25 or 10x30 |
| Car plus household goods | 10x20 minimum, 10x25 comfortable |
Advertised unit sizes are nominal. Real interiors are often a few inches under, and the door opening is always narrower than the unit — measure both before you commit.
What the facility needs from you
- A drive-up unit — interior units with a corridor are rarely usable for a vehicle
- A roll-up door at least 8 ft wide; measure your mirrors, not your wheelbase
- Proof of registration and insurance, which most US facilities require
- Written confirmation that the facility permits vehicle storage at all
Choose the size from the real constraint
| What you are storing | Decision | Why |
|---|---|---|
| Compact car only | 10×15 can work | Measure total length, mirror width and the door opening; there will be almost no working room. |
| Mid-size sedan or crossover | Choose 10×20 | The extra 5 ft provides safe door and front/rear clearance. |
| Full-size SUV, pickup or household goods too | Choose 10×25 or larger | Vehicle footprint plus access space consumes most of a 10×20. |
How to prepare it for storage
Fill the tank to limit condensation, change the oil, over-inflate the tires slightly, disconnect or trickle-charge the battery, and leave it out of gear with the parking brake off if it will sit for months.
If household goods are going in too
A vehicle sets a floor on the unit size, but belongings stored alongside it still have to fit around the footprint. Work the volume out with size it from your own item list, then check the result against /storage-unit-sizes/10x20/ — the size most vehicle-plus-household loads land on.
For what that unit holds beyond the vehicle, the full item list for a 10×20 lists a worked inventory, and /storage-unit-cost/10x20/ covers what it costs per month.
Common mistakes
- Measuring wheelbase instead of total bumper-to-bumper length and mirror-to-mirror width.
- Assuming an advertised 10 ft width means the roll-up door is also 10 ft wide.
- Forgetting the space needed to open a door, walk out and close the unit safely.
- Booking first and asking about fuel, registration and insurance rules later.
Check the size against your own list
Related questions
What size storage unit do I need for a car?
A car needs at least a 10x20 storage unit. Compact cars fit a 10x15 with almost nothing to spare, while full-size sedans, SUVs and trucks need a 10x20 or larger. The door width matters as much as the unit length.
Do storage facilities allow this?
Most do, with conditions. Expect to show registration and insurance, and expect the facility to require a drive-up or ground-floor unit. Confirm in writing before you pay — policies differ between branches of the same chain.