How to Choose RV Garage Sizes by Width, Depth and Door Height

The dimensions for an RV garage are basically three figures: the width, the depth, and the height of the door. If you get any of these wrong, then the garage won’t function properly for your needs. People usually get the depth correct since it’s simple just to measure your RV from bumper to bumper and then add a few feet. It’s with respect to width and height that problems can show up, since figures which seem large enough on paper quickly appear too narrow when you’re moving a 40-foot coach through a door and your mirrors are only two inches from the edge. The actual capacities of the various sizes, the space required by each type of RV, and the clearances that distinguish a garage you can use from one that only just holds your RV are all explained here.

RV Garage Size Chart by Rig Type

Once you have located your class, check the final two columns since it is the figures you should give your builder.

Bay and door sizes are minimums for comfortable daily use, not the absolute smallest opening your rig will squeeze through. Always check your own model’s spec sheet before you build.

The Most Important Garage Clearances

The manufacturer’s specifications are the starting point rather than the end point; each dimension listed below represents the space between the RV and the building, and all of them have a reason for being that you’ll realize during the first week.

Standard RV Garage Sizes and What Each One Holds

Builders usually give a few typical footprints. The size that each one actually corresponds to when you allow for the clearances above is as follows. The larger footprints assume a shop as well as parking, and laying out the workshop side is its own exercise.

How Wide Should an RV Garage Be?

Larger than you imagine. Since most RVs have a width of 8 to 8’6″ across the body, a 12-foot bay does fit in principle. For context, standard garage dimensions for cars put a single bay at 10 to 12 feet, so an RV bay begins where a car garage ends. It also provides you with around 21 inches on each side, which is sufficient for walking and that’s about all. At sixteen feet a Class A truck ceases to seem like a puzzle since you have about 3’9″ on each side, sufficient to be able to open every storage compartment at the same time, set up a folding table while loading, and have a ladder by the truck without having to move it. When the vehicle is 24 feet and over you can use a slide-out with the doors closed.

Width is not only the least expensive dimension to include when designing a building but also the most costly one to add afterward; attaching four feet of width to a 50-foot building amounts to 200 square feet, whereas adding it after the slab has been poured involves a completely different kind of project.

Ceiling Height vs. Door Height

They are two different figures and people always mix them up. The door opening is the part that your RV goes through, and the ceiling is the one you have to live under when you’re inside. The height of the door must be greater than the highest point of the roof by the amount of the track hardware and also include a margin for the approach. It is comfortable to have a 12-foot 9-inch coach behind a 14-foot door, but when a solar array is added, the same coach will only just work with a 13-foot door. It helps to see how standard garage door sizes compare, since a residential opening tops out around 8 feet.

People tend to underestimate ceiling height and end up regretting it. If the ceiling is two or three feet above the roofline, you’ll be able to reach the top to carry out sealant work, check the solar panels, and wash the exterior, all of which are tasks that turn out to be more frequent than you expect. A 16-foot interior paired with a 14-foot door is a common and sensible combination.

What RV Garage Sizes Cost

Costs can vary a lot depending on how finished the building is. A basic post-frame shell runs roughly $15 to $45 per square foot, and post frame and pole barn sizes covers the spans and post spacing that come with that method. A fully finished RV garage with insulation, concrete, electrical, and a tall roll-up door typically lands somewhere between $40 and $140 per square foot, with a national average. For comparison, what a standard garage costs to build gives you the conventional baseline before the RV premium. The tall door is a genuine extra cost; a 14 by 14 roll-up door costs considerably more than a standard residential door and the taller walls it requires add to both the framing and materials used throughout the building. That is the compromise you are accepting in order to have clearance. 

The cost of running power to a separate building is usually an extra $1,000 to $2,500 and should be planned for at the outset because, once you’re using the space, RV shore power, a compressor, and workshop lighting are not optional. These figures are only approximate and apply nationally, so obtain local quotations before finalising the layout.

Sizing Mistakes Worth Avoiding

Building to the current rig they own and not considering upgrading. People upgrade over time, but the garage doesn’t. So, if there is any possibility that you might need a longer coach in the future, add five feet to the depth at this stage when it’s still only indicated on the drawing.

Taking the measurements from the brochure. The heights given are those of the factory-fitted roof, since the addition of solar panels, a satellite dish, and a second air-conditioning unit will affect the figures. You should park on level ground and then use an actual tape measure to go from the pavement to the highest object nearby.

Ignoring the approach. A garage which fits exactly is of no use if you can’t align with it; you need a straight section and a turning radius outside the door, and a sloped driveway alters your effective clearance as the nose of the vehicle rises. Our guide to driveway width and turnaround dimensions has the numbers for that approach.

Skipping the pedestrian door. It will only save you a few hundred dollars, but without it you’ll have to use a 14-foot roll-up every time you need a screwdriver, which is slow, noisy, and a good way of heating up the entire outdoors in January.

Frequently Asked Questions

What is the most common RV garage size?

It is about 18 feet wide and 40 feet deep with a 14-foot high ceiling. It can accommodate most Class A gas coaches and the majority of fifth wheels. When you are somewhere in between the available sizes, increasing the width is more advantageous than increasing the length.

Can you park an RV in a regular garage?

A Class B camper van would have to be used, provided only that the door is tall enough. Typical residential garage doors are 7 or 8 feet high, and even a small camper van is more than 9 feet in height. Any vehicle larger than this would require a specially constructed building. If walls are more than you need, covered RV parking without walls is the cheaper route.

How tall should an RV garage door be?

Most Class A motorhomes and travel trailers have a need for an opening of at least fourteen feet, while Class C vehicles are suitable at 12 to 13 feet; fifth wheels are the exception, and in this case a door size of 15 or 16 feet is safer due to the nose lift when hitching.

Do I need a permit to build an RV garage?

Almost always. Detached structures of this size trigger permitting nearly everywhere, and height limits plus side-yard setbacks are the two rules that most often force a redesign. Check both before you settle on a footprint. The residential code text your inspector uses is public if you want the actual language, and it is worth knowing whether the space counts as square footage on your assessment.

Should I insulate an RV garage?

If you’ll spend time in it, yes. Insulation also keeps temperature swings off your seals, tanks, and batteries, which matters in cold climates. Insulating the walls and roof of a tall building costs more than a standard garage, so price it into the original build rather than adding it later. Our guide to insulating a detached garage walks through the materials worth using.

Dimension ranges compiled from manufacturer specifications and industry sizing guides, including Winnebago, Jayco, Thor Motor Coach, Grand Design, ProBuilt Steel, and cost data from Angi and HomeGuide. Verify against your specific model year and local quotes before building.

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