Last reviewed October 2026
The short answer
Measure the RV bumper to bumper including the hitch, add 2 to 4 feet at each end, and make it at least 12 feet wide, or 14 feet for a Class A with slide-outs. For most trailers and Class C motorhomes that lands on a 12x40 pad; for the longest Class A coaches, up to 45 feet, it means 50 feet or more.
| RV | Typical length | Suggested pad |
|---|---|---|
| Pop-up or teardrop trailer | Under 20 ft | 10x24 to 10x30 |
| Travel trailer | 20 to 35 ft | 12x30 to 12x40 |
| Fifth wheel | 25 to 40 ft | 12x40 to 12x45 |
| Class C motorhome | 21 to 35 ft | 12x30 to 12x40 |
| Class A motorhome | 29 to 45 ft | 14x40 to 14x50+ |
Swipe the table sideways to see every column →
Suggested pads add end clearance and walking room to typical lengths. Published pad sizes range from 10x40 to 14x65. Always size from your own rig's measurements.
The room people forget
- Slide-outs: measure the RV's width with the slides fully out
- The entry door and steps, usually on the curb side
- Walking room to reach storage bays, hookups and the generator door
- The swing through the gate: the entry needs more width than the pad
- Clearance from the house, the AC unit and the block wall
- Overhead: eaves, trees and any patio cover over the pad's path
Once the size is set, the thickness follows the RV's weight; see RV pad thickness and rebar. For the build itself, see concrete RV pads.