12×30 storage unit: prices, size & what fits

The middle price for a 12x30 storage unit is $195 per month and the average is $207, based on 470 units indexed in the United States. Published rates run from $24 to $790 depending on location, climate control, and market demand. The median is the better guide: a small number of city-centre units sit far above it and pull the average up.

A 12x30 unit (360 sq ft) typically holds rv, motorhome or travel trailer, boat on a trailer, with room to work around it, two standard vehicles side by side, plus boxes and smaller items. It is roughly sized for a vehicle or 4–5 bedroom home.

Yes, with room to spare — and that is the thing to watch. A 12x30 is 360 square feet against the 100 a one-bedroom usually needs, so unless you are also storing rv, motorhome or travel trailer, you would be paying every month for space you do not use. Price a 10x10 alongside it before you book.

Climate-controlled units cost roughly 25–50% more than standard units but protect wood furniture, electronics, photos, and documents from humidity damage. They are recommended for anything temperature-sensitive or stored longer than 3 months in humid climates.

Storage pricing is driven by local land cost, facility demand, amenities (climate control, 24-hour access, drive-up), and unit availability. The averages on this page are computed directly from 470 real 12x30 units listed across our facility index.