What Does a ProMaster Van Conversion Actually Cost?

The RAM ProMaster is one of the most popular platforms for van conversions, and for good reason. It costs less than a Sprinter, has a wider interior, and the front-wheel-drive layout creates a flat floor that simplifies the entire build. But "cheaper vehicle" doesn't always mean "cheaper project." The build itself is where most of the money goes.

We build ProMasters regularly in our shop, so these numbers come from actual projects. Not estimates from forums or YouTube comments. Real materials, real labor hours, real invoices.

The ProMaster's Cost Advantage Starts with the Vehicle

The biggest financial argument for the ProMaster is the used-market purchase price. A comparable used ProMaster typically runs $10,000 to $15,000 less than a similar-year Sprinter with equivalent mileage and roof height. On a new van, the gap is smaller — usually $2,000 to $5,000 — because Sprinter MSRPs haven't climbed as fast as ProMaster's in the last few years.

Here's what that looks like in practice:

• Used ProMaster 2500 High Roof (2019-2022, 50K-80K miles): $25,000-$35,000
• Used Sprinter 2500 High Roof (same years and mileage): $35,000-$50,000
• New ProMaster 3500 High Roof 159" WB: $53,000-$57,000 (standard vs extended body)
• New Sprinter 2500 High Roof 170" WB: $57,000-$65,000

On the used side, that $10K-$15K savings is real money. For many customers, it's the difference between a Basic and Standard build, or it lets them put better components into the conversion itself.

Build Cost by Tier

Conversion costs cover everything that goes into the van after you buy it: insulation, flooring, electrical, plumbing, cabinetry, appliances, and all the labor to install it. We break builds into three tiers based on scope and finish level.

Basic Build: $30,000-$50,000

A Basic build is a fully functional camper van. This isn't a bare-bones shell with a mattress on the floor. You get real electrical with lithium batteries and solar, real plumbing with a freshwater tank and sink, proper insulation, and a comfortable sleeping area. It's everything you need to live in the van comfortably for days or weeks at a time.

What makes it "basic" is the finish level and material choices. Simpler cabinetry, standard countertops, a straightforward layout. The systems work well. The interior is clean and functional. It just doesn't have the custom woodwork or premium finishes of a higher-tier build.

Standard Build: $55,000-$75,000

This is where most of our ProMaster builds land. A Standard build adds better materials, more refined cabinetry, upgraded appliances, and a more polished interior finish. You might see hardwood accents, a larger battery bank, a diesel heater, a full galley kitchen with a two-burner stove, and a dedicated bathroom area with a shower.

The labor hours increase here because the fit and finish takes more time. Cleaner edges, better joinery, more attention to how everything looks and feels. The systems are the same as Basic in principle but sized up: more solar, more battery capacity, more water storage.

Premium Build: $80,000-$120,000+

Premium is about craftsmanship. The electrical components at this level aren't dramatically different from Standard. You're already near the ceiling on inverter size, battery capacity, and solar wattage. What changes is the interior: custom millwork, premium wood species, integrated lighting, thoughtful storage solutions that look built-in rather than bolted on.

Premium builds take significantly more labor hours. Every panel fits tight. Every transition is clean. The result feels like a high-end tiny home, not a converted cargo van. These builds also tend to include features like heated floors, powered steps, or custom storage solutions designed around a specific lifestyle.

Cost by System

Breaking the build cost into systems helps you understand where the money goes. These are approximate ranges that shift depending on tier and specific choices.

Electrical: $4,000-$15,000

The electrical system is the backbone of any van conversion. It powers your fridge, lights, water pump, fan, charging, and potentially heating and cooling. A basic system includes 200W solar, a 200Ah lithium battery, a 1000W inverter, and all the wiring, fusing, and charge controllers to make it work safely.

Move up to Standard or Premium and you're looking at 400-600W solar, 300-400Ah batteries, a 3000W inverter, a DC-DC charger, and potentially a shore power hookup. The components cost more, but the real cost driver is the labor. Electrical is meticulous work. Every connection matters.

Our off-grid guide covers electrical system sizing in more detail.

Interior and Cabinetry: $8,000-$35,000

This is the biggest cost bucket and the widest range. Interior includes the bed platform, all cabinetry, countertops, wall panels, ceiling panels, flooring, and trim. A basic interior uses plywood with a simple finish. Premium uses hardwood, custom-milled pieces, and takes three to four times as many labor hours.

The ProMaster's wider body (6.5 feet interior width vs. about 5.8 for a Sprinter) means more square footage of flooring, larger wall panels, and wider countertops. Materials cost runs slightly higher than a Sprinter build, typically $500-$1,500 more depending on tier. But you get substantially more living space for that cost.

Plumbing: $2,000-$8,000

A basic plumbing system includes a 20-gallon freshwater tank, a 12V water pump, a sink, and a small grey water tank. Standard adds a larger freshwater tank (30-40 gallons), hot water (either an on-demand heater or a tank), and potentially a shower. Premium refines the fixtures, adds better filtration, and integrates everything for a cleaner look.

Insulation, Walls, and Flooring: $3,000-$8,000

We use Thinsulate for wall and ceiling insulation and XPS foam on the floors. Thinsulate handles moisture well without trapping condensation in the walls, which is critical in a van. The ProMaster's wider floor and larger wall panels mean more material, but the flat floor simplifies installation compared to a Sprinter's ribbed floor.

Wall and ceiling panels go over the insulation. Options range from simple plywood or composite panels to tongue-and-groove cedar or shiplap. Flooring is typically vinyl plank or similar durable material over the XPS foam subfloor.

Climate Control: $1,500-$5,000

A roof vent fan (MaxxAir or similar) is standard on every build: $300-$500 installed. A diesel heater (Webasto or Espar) runs $2,000-$3,500 installed and is worth every dollar if you plan to camp in anything below 50 degrees. AC is the expensive add-on. Rooftop or under-bed AC units run $2,000-$4,000 plus the electrical capacity to run them.

Exterior: $500-$3,000

Roof rack, ladder, awning, exterior lighting. Most builds include a roof rack for solar panel mounting at minimum. Awnings ($800-$1,500 installed) and exterior showers are popular Standard and Premium additions.

Materials vs. Labor

This is the question people don't think to ask, and it matters. On a typical Standard ProMaster build ($55K-$75K), the split looks roughly like this:

• Materials and components: 40-50% of the total ($22K-$37K)
• Labor: 50-60% of the total ($27K-$45K)

Materials include everything you can touch: batteries, solar panels, lumber, insulation, plumbing fittings, appliances, hardware, wiring, flooring. Labor is the skilled work of installing all of it correctly, safely, and with a quality finish.

The labor percentage increases as you move up in tiers. A Premium build might be 60% labor because the craftsmanship demands more hours per square foot. A Basic build is closer to 50/50 because the work is efficient and the finishes are simpler.

This is also why DIY builds look dramatically cheaper on paper. When people quote "$15K builds" online, they're counting materials only and valuing their own hundreds of hours of labor at zero. Professional builds include the labor because we're doing the work for you, and doing it right the first time.

Total Project Cost: Vehicle + Build

Here's what a complete ProMaster camper van project looks like when you combine vehicle purchase and professional conversion:

ProMaster vs. Sprinter: The Cost Comparison

When people compare these two platforms, the ProMaster wins on vehicle cost and interior width. The Sprinter wins on resale value, ride quality, and the availability of AWD models.

From a pure cost perspective:

• Vehicle savings: $10K-$15K less for the ProMaster
• Build cost: Roughly equal. The ProMaster's wider body uses slightly more materials, which offsets any other savings
• Total project: $10K-$15K less for ProMaster at every tier
• Resale: Sprinters hold value better, which partially closes the gap over time

If you're choosing primarily on budget, the ProMaster gets you into a fully built van for less money. If you want help comparing platforms, we've written a detailed guide.

How the Wider Body Affects Build Cost

The ProMaster's interior is about 6.5 feet wide. The Sprinter and Transit are closer to 5.8 feet. That extra 8 inches across the van adds up.

More floor area means more flooring material, more insulation on the floor, and wider subfloor panels. Wider walls mean larger insulation panels and more wall covering material. The bed platform and countertops span a wider space, using more lumber and more surface material.

In practice, this adds $500-$1,500 in materials depending on the build tier. But you get a noticeably more livable space. The ProMaster is the only van where most people can fit a bed sideways (east-west) in the 136-inch wheelbase model. That opens up floor plan options that simply aren't possible in narrower vans.

So yes, you pay slightly more in materials. But the cost per usable square foot is actually lower in a ProMaster. You're getting more living space for each dollar spent on the build.

What Drives Cost Up (and Down)

Things that increase cost:

• Custom cabinetry with hardwood and detailed joinery
• Larger electrical systems (more solar, bigger battery bank, larger inverter)
• Diesel heater and/or AC
• Full bathroom with shower
• Premium appliances (induction cooktop, larger fridge)
• Powered accessories (steps, awnings, bed lifts)

Things that keep cost down:

• Simpler layout with fewer custom pieces
• Standard materials (plywood, laminate countertops)
• Right-sized electrical (don't overbuild for how you'll actually use it)
• Portable toilet instead of built-in bathroom
• Skipping AC if you camp in moderate climates

The best way to manage cost is to be honest about how you'll use the van. If you're doing weekend trips to California beaches, you don't need a system built for off-grid winter camping in Montana. Build for your actual use case and the budget stays in check. Check out our van life cost guide for more on total cost of ownership.

Our Build Process and Payment

Every ProMaster build starts with a consultation where we talk through your plans, your budget, and what you actually need. We put together a detailed quote broken down by system so you can see exactly where every dollar goes. No vague estimates.

Builds typically take 6-16 weeks depending on tier. Basic builds run 6-8 weeks. Standard runs 8-12 weeks. Premium runs 12-16+ weeks. Payment is structured in milestones: a $6,000 deposit to book your build slot, 50% at build commencement (due 30 days before your van arrives at the shop), 20% at the halfway point, and the remaining balance at completion.

If you want to see what a ProMaster build looks like in our shop, check out our past builds.

Frequently Asked Questions