Which size do you need?
Add up the boat's length overall, the outboard overhang and the trailer tongue, then leave some room to walk around. Drive-up units for vehicles are commonly 10 × 20, 10 × 25 and 10 × 30 ft; parking spaces go longer. The space size calculator gives you the size.
Door height and width
Measure the height on the trailer with the windshield, T-top or tower and compare it with the door opening, not the ceiling. Roll-up doors are usually a little narrower than the unit.
Rules to check
- Whether fuel may stay in the tank (many facilities limit it).
- Batteries: removed or disconnected.
- No work, no running engines inside units.
- Proof of registration and insurance.
Unit, covered space or open lot?
A unit protects best but limits height; a covered or open space is cheaper and takes taller boats. The comparison guide explains the trade-offs.
Frequently asked questions
Will a 20 ft boat fit in a 10 × 20 unit?
Rarely once you add the motor and trailer tongue: most 20 ft boats on a trailer need a 25 ft space or more. Measure tip to tip.
Can I store a jet ski in a storage unit?
Usually yes, often in a 10 × 15 or 10 × 20 unit with its trailer; check the length with the trailer.
Sources: Public Storage boat storage unit listings (unit sizes), search results 27 Oct 2026; CubeSmart boat storage guide (outline). Guide reviewed on 27 Oct 2026 by the Nautsy team. Spotted an error? Tell us.