How much does it cost to build an RV garage in Arizona?

The spread on an RV garage is wide, $40,000 to $120,000 or more in Arizona in 2026, because the size jump between options is large. A simple tall detached garage for a single motorhome sits near the bottom. A large, finished, climate-controlled RV garage with a workshop, a bathroom, and a high-clearance door climbs past $120,000. These are 2026 planning ranges, not quotes, since prices move with steel, concrete, and labor costs. The two things that make an RV garage cost more than a normal garage are the tall door and the extra-tall walls and roof needed to fit a 12 to 14 foot Class A motorhome.

Before you design one, you have to check local zoning, because height and setback limits decide how tall and where you can build. A tall RV garage can run into a city or county height cap. Below is how the cost breaks down and what the rules require.

What an RV garage costs in Arizona

Plan on roughly $40,000 to $120,000+ for a detached RV garage in metro Phoenix, with ceiling height and size driving most of the difference. A standard car garage is about 9 to 10 feet tall inside. An RV garage needs 14 to 16 feet of interior clearance to fit a large motorhome plus its roof vents and air conditioners, and that extra height raises the cost of the walls, the door, the roof, and the foundation.

The price splits into rough tiers:

• Basic RV carport or shell garage. A tall metal or block shell, a roll-up door, a slab, and minimal finish. Often $35,000 to $60,000.
• Standard finished RV garage. Insulated walls, an electrical sub-panel, lighting, and a quality 14-foot door. Commonly $60,000 to $100,000.
• Premium RV garage. A large footprint, climate control, a workshop, a bathroom, RV utility hookups, and a finished interior. These reach $100,000 to $150,000+.

The numbers swing with how big the building is, how tall the door is, and how finished the inside is. Always get a written, itemized bid from a licensed contractor on your actual lot before you budget.

Why an RV garage costs more than a normal garage

The cost gap comes down to height, the door, and the structure needed to carry them. An RV garage is not just a wider garage, it is a taller building, and height drives material and labor up across the board. A 14 by 14 foot RV door is far more expensive than a standard 8 by 7 foot car door, and it needs a heavier opener and a reinforced header to span the opening. The taller walls use more block or framing, more sheathing, and more stucco or siding.

The roof and foundation scale up too. A taller building catches more wind, so the roof framing and connections are heavier to meet Arizona wind loads. The slab often needs to be thicker to carry the weight of a loaded motorhome, which can top 30,000 pounds. Getting a vehicle that heavy on and off the slab without cracking it means proper thickness and a good base, and that is more concrete than a car garage needs.

Finishes are where budgets diverge most. A bare shell with a slab and a door is the cheap path. Add insulation, a mini-split for climate control, an RV-rated electrical hookup, a dump-station connection, a sink, and a workshop, and the cost climbs fast. Decide up front whether you want a simple cover or a finished, conditioned building, because that single choice can double the price.

Height and zoning rules you must check first

Local zoning caps how tall an accessory building can be, and a tall RV garage can hit that cap, so confirm your limit before you design. In unincorporated Maricopa County, which covers areas like the Rio Verde Foothills, accessory structures such as detached garages generally may not exceed 30 feet in height. That is usually enough room for a tall RV garage, but it is a hard ceiling, and a steep roof on an already-tall building can approach it. Cities set their own limits, and some residential zones cap accessory buildings lower than 30 feet, so check the zoning for your specific lot.

Setbacks matter just as much as height. In unincorporated Maricopa County, a detached accessory building may sit in the required rear or side yard but, in the county's words, "shall not be nearer than three feet to any side or rear lot line" and "shall not occupy more than 30% of any required yard." A garage entered from an alley must stay at least ten feet from the alley line. A large RV garage takes up a lot of yard, so the 30% cap and the setback can limit where it fits even on a big lot. Cities like Scottsdale and Phoenix have their own setback and lot-coverage rules in their zoning ordinances, and they vary by zoning district, so pull the rules for your exact parcel rather than assuming the county figures apply.

There is also an HOA layer on many subdivisions. Even where the city allows a tall detached garage, a homeowners association can restrict building height, exterior materials, and whether a visible RV garage is allowed at all. On a rural lot with no HOA, you have far more freedom, which is one reason RV garages are common on acreage in Rio Verde, Cave Creek, and Apache Junction. Confirm both the zoning and any HOA rules before you commit to a design.

How to plan an RV garage into a new build

Building the RV garage with the house is usually cheaper and smoother than adding it later, the same as with a pool. When the garage goes in during construction, the crew already has open site access, the grading is done once, and the utilities can be trenched for the house and the garage together. Pouring the heavy RV slab while the concrete crew is already on site saves a separate mobilization later.

Plan the utilities early. A finished RV garage often wants a 240-volt circuit for tools or an RV hookup, a dedicated sub-panel, a water line, and sometimes a sewer or dump connection. Roughing these in during the build is far cheaper than cutting into a finished slab and trenching across a landscaped yard afterward. If you want climate control, size the electrical for a mini-split from the start.

Match the design to your actual RV. Measure your motorhome's height with the air conditioners and vents, add clearance, and size the door and ceiling to fit with room to spare. A Class A motorhome often stands 12 to 13.5 feet tall, so a 14-foot door with a 15 to 16 foot ceiling leaves room to drive in and work overhead. Also measure the length and width, since a toy hauler with a slide-out or a long diesel pusher needs more floor than a standard two-car bay. A door that is an inch too short is an expensive mistake. Confirm current pricing with a licensed builder on your real plan and lot, because steel, concrete, and labor costs shift within a single building season. Once you fix the size, the door height, and the finish level, a contractor can turn the broad $40,000 to $120,000+ range into a firm bid that fits your zoning.

The Jematell Homes approach

We build the budget line by line so the number you sign is the number you build to. If you are planning a custom home in Scottsdale, Rio Verde, or the greater Phoenix metro, we are happy to walk through your project.

Sources

• Maricopa County: Accessory Structures, Equipment, and Setbacks (height and setback rules)
• City of Scottsdale: Building Codes (adopted codes and permit basis)
• Maricopa County: Planning and Development (zoning and permits)