Thinking about converting a van but unsure how much it'll actually cost? You're not alone.
The answer depends on the type of build you're aiming for. A simple weekend camper can cost under £5,000. On the other hand a premium off-grid adventure van can easily exceed £40,000.
I converted my campervan and learned that small purchases add up quickly, just like big ones.
This guide breaks down 2026 costs so you can budget properly before buying your first screw.
Quick Answer
| Build Type | Estimated Costs |
| Basic Weekend Warrior | £3,000 - £7,000 |
| Mid-range Road Tripper | £8,000 - £18,000 |
| High-end Off-grid Nomad | £20,000 - £45,000+ |
Remember this is just the conversion cost. You'll also need to budget for purchasing the van itself.
Campervan Conversion Costs Breakdown
Here's where your money goes:
The Van
This is usually the largest individual expense.
Typical prices in 2026:
- Older Transit / Vivaro £4,000-£8,000
- Mid-age Crafter / Sprinter £8,000-£18,000
- Low mileage modern van £20,000+
Buying the right van can save thousands later so don't rush this stage.
Insulation
An insulated van is worth every penny.
Expect to spend around:
£200 - £600
This usually includes:
- Sticky-back foam insulation
- PIR board
- bottle insulation
- Vapour barrier (optional)
- Adhesives
- Foil tape
Good insulation keeps you warm in cold winters, cool in hot summers but also reducing condensation.
Van Adventurer Recommends: Sticky foam insulation, foil tape and recycled plastic bottle insulation in cavities and behind walls/ceiling. In our opinion this is the best value for money and has worked for us first hand.
Windows
Adding windows can transform a panel van.
Budget:
£300-£1,200
Depending on:
- Sliding windows
- Privacy glass
- DIY vs fitting
- Number of windows
Van Adventurer Recommends: Buy just one sliding window and the rest standard, sliding windows can cost 400% more. We opted for a slider window on just the side door, which works great for when you want the door shut but still need some ventilation through the van.
Ceiling Fan
A roof vent is one of the most important upgrades.
Without ventilation you'll quickly get:
- Condensation
- Damp bedding
- Mould
- Poor airflow
- Smell
Typical cost:
£120-£450
Van Adventurer Recommends: Branded air fans are extremely popular in the Van Life community, and while we agree they are good, we believe this is an area where you can get better value by avoiding well known brands. There are plenty of better value alternatives created in recent years, just beware to check reviews. We bought our fan for £120, its worked flawlessly since we bought it 3 years ago, it can be controlled using a remote, has speed settings, both exhaust / intake modes and closes automatically when it detects rain. What more could you need?
Electrical System
This is the area that budget can vary the most, depending on your electrical needs and also how 'Off-grid' you would like your setup to be.
A basic setup may include:
- Leisure battery
- Fuse box
- USB sockets
- LED lights
A larger off-grid system may include:
- Lithium batteries
- Solar panels
- Inverter
- Battery charger
- DC-DC charger
- Monitoring system
Typical costs:
- Basic: £500-£1,000
- Mid-range: £1,500-£3,000
- Premium off-grid: £4,000-£8,000+
Van Adventurer Recommends: Not all van setups require an inverter, you will only need an inverter if you want to run more powerful items on a regular domestic mains voltage (same as your plugs at home). You can run cooler box fridges and phone chargers of a simple AC system.
Choosing an inverter: Figure out what will be the most powerful electrical item in your van (W - Watts). High power devices include items such as kettles, hair dryers, microwaves etc. Make sure the inverter you choose can accommodate the maximum power of that item plus any other item that would be running at the same time.
Solar Panels
Solar isn't essential for everyone. Makes wild camping much easier.
Typical prices:
- 100W system: £200-£400
- 200–300W system: £500-£900
- Off-grid setup: £1,000+
Van Adventurer Recommends: Solar panels generally are very inexpensive for how useful they are, for extremely good value you can create a setup which will allow you to be completely off grid and not require mains charging at all. There are many systems which can convert solar charge and alternator charge (charge while you're driving) and store this energy back in your battery.
Furniture
Kitchen units, bed and storage can either be bought or built yourself.
Budget:
-
£500-£3,000
Costs depend on:
- Birch plywood
- Lightweight furniture board
- Professional CNC-cut kits
- Hardware. Hinges
Van Adventurer Recommends: If you fancy yourself as a Bob or Wendy, build your own units. Around 9mm works great, it is light and versatile but also sturdy and will save you money.
Kitchen
Typical kitchen costs:
- Sink
- Tap
- Water tanks
- Gas hob
- Plumbing
Budget:
- £300-£1,500
Van Adventurer Recommends: Two burner gas stoves are fantastic for vans, they enable you to cook outside your van when the weather allows and can also be stored away when not in use.
Fridge
A compressor fridge is one of the investments you'll make.
Budget:
- £150-£900
Van Adventurer Recommends: You don't need fixed in hobs, two burner gas stoves are fantastic for vans, they enable you to cook outside when the weather allows and can also be stored away when not in use, creating more surface space.
Heating
If you're planning year-round adventures a diesel heater is a great investment but we've discovered a lesser known solution using a mattress topper heated blanket.
Typical cost:
- £150-£1,200
Cheap Chinese heaters can work well while arguably more reputable branded systems may offer quieter operation and better reliability but come at a higher price.
Van Adventurer Recommends: One of the best purchases we've made for our van is a heated blanket that fits over our mattress, it uses low power and has kept us warm even on nights below freezing temperature. We have a mid size van and we've never needed any other form of heating.
Flooring & Wall Panels
Budget:
- £300-£1,000
Including:
- Floor
- Vinyl flooring
- Wall panels
- Ceiling panels
- Carpet lining
Van Adventurer Recommends: Add a sheet of underlay lining beneath your floor, this increases insulation but also reduces the chance of any squeaking when you walk around your van.
Hidden Costs Most People Forget
These smaller purchases catch everyone out.
Don't forget to budget for:
- Screws
- Bolts
- Wood
- Adhesives
- Sealants
- Wires
- Connectors
- Cable conduit
- Paint / Wrap
- Sandpaper
- Tools
Individually they're inexpensive. Together they can easily add another £500-£1,500 to your build.
If you have any questions feel free to contact us through our socials @van.adventurer or our emails vanadventurer@gmail.com, we'd be glad to help where we can.
FAQs
Can you save money by doing it yourself?
Absolutely.
Professional campervan conversions often cost £40,000-£80,000 depending on specification.
A confident DIY builder can often produce a specification for less than half that price.
The trade off is time.
Many self build conversions take at least 6 months, depending on experience and how much spare time you have.
Is Converting a Campervan worth it?
Yes.
Not only can you build something tailored exactly to your adventures, but you'll understand every part of the van, if anything ever needs repairing on the road.
It isn't always cheaper than buying a camper, but the freedom to design your own layout, choose your own electrical system and build exactly what you need makes the process incredibly rewarding.
Can you convert a van for under £5,000?
Yes. If you already own the van and complete all the work yourself a simple conversion with electrics and furniture is achievable.
What's the expensive part of a campervan conversion?
The electrical system and purchasing the base van are usually the costs.
Is it cheaper to buy or convert a campervan?
It depends on the specification you're looking for. DIY conversions often offer value while buying an already-converted camper can save months of work.
How long does a campervan conversion take?
Most DIY conversions take, between 6 months and 2 years depending on experience, budget and available time.
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