RV Storage Buildings, Sized Correctly
Most "RV garage" regrets come down to one number: door height. A Class A motorhome with roof AC needs a 14-ft door under a 16-ft eave — taller than any standard garage, and exactly what clear-span steel does cheaply. Here's how to size and price an RV building that fits the rig you have and the one you'll upgrade to.
Size by RV class
| What you store | Door & eave | Building |
|---|---|---|
| Travel trailer / Class C | 12×12 door · 14-ft eave | 30×40 (1,200 sq ft) |
| Class A motorhome | 14×14 door · 16-ft eave | 30×50 (1,500 sq ft) |
| Class A + toad or boat | 14×14 + 10×10 doors | 40×60 (2,400 sq ft) |
| Multi-bay / rental RV storage | Repeating 14-ft bays | 40×80 and up |
What RV buildings cost in 2026
| Scope | Typical 2026 range |
|---|---|
| 30×40 × 14-ft eave, erected | $26,000 – $42,000 |
| 30×50 × 16-ft eave, erected | $32,000 – $52,000 |
| 40×60 × 16-ft eave, erected | $44,000 – $70,000 |
Spec notes that matter
- Depth over width: a 45-ft Class A wants 50 ft of clear depth — walk-around room saves door dings.
- 30 or 50-amp service for battery maintenance and pre-trip cooling; rough it into the slab.
- Vents or ridge vent: a parked RV building heat-soaks; passive venting is cheap insurance.
Price yours in 3D — free
Pick your size, doors, colors — even a mezzanine or steeple — and watch the price update live. Free, no login to design.
Open the 3D Designer →Frequently asked questions
How much does an RV storage building cost?
In 2026, erected steel RV buildings typically run $26,000–$42,000 for a 30x40 with a 14-ft eave and $32,000–$52,000 for a 30x50 with a 16-ft eave — the size a Class A actually needs.
What size door does a Class A motorhome need?
A 14-ft-tall door under a 16-ft eave. Roof ACs and satellite domes push many Class As past 12 ft 6 in — measure your rig at its tallest point and add a foot.