Converting a campervan

Converting your own van is hugely rewarding, but it's a serious project. Before you start, be honest about your DIY skills, the time you can commit, and whether you have space to work. A typical self-build takes 3-12 months of evenings and weekends.

The payoff is a van tailored exactly to your needs, often for less than a professional conversion - but a poorly executed build can cost more to fix than it would have to commission. If you're unsure, consider a part-converted base or a professional conversion.

The van you start with shapes everything that follows. Popular bases include the VW Transporter, Ford Transit, Mercedes Sprinter, Fiat Ducato and Renault Trafic - each with different sizes, heights and price points.

• Mid-size (VW T6, Transit Custom) - easy to drive, great for weekends, limited space.
• Large panel van (Sprinter, Ducato, Boxer) - room for a full layout, standing height, ideal for touring.
• High-roof and LWB - maximum living space, fixed beds and full kitchens.
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Buy the best condition base you can afford. A cheap van needing mechanical work eats into your conversion budget fast.

Work out your layout before cutting a single panel. Consider how many will sleep and travel, whether you want a fixed bed or rock-and-roll seat, where the kitchen and washroom go, and how you'll use the space day and night.

Sketch it to scale, mark window and door positions, and think through walking routes, storage and ventilation. A well-planned layout makes a small van feel spacious; a poor one makes a large van feel cramped.

Good insulation keeps your van warm in winter, cool in summer, and reduces condensation. Use a combination of closed-cell foam, sound deadening and wool or recycled insulation in the cavities, and add a vapour barrier to manage moisture.

Line the walls and ceiling with lightweight panels - plywood, plastic composite or carpet - and seal gaps. Don't skimp here: poor insulation is the most common regret among self-builders.

Your electrical system powers lighting, the fridge, charging, water pumps and fans. A typical setup uses a leisure battery (or lithium bank) charged from the alternator while driving, plus solar panels and a mains hook-up for camping on sites.

Size your battery bank to your usage, fit a battery management system or split-charge relay, and use proper fuses and cable sizes. If you're not confident with 12V electrics, get this part professionally installed - it's the most common source of build problems.

Even a simple water system makes van life comfortable. You'll need fresh and grey water tanks, a 12V pump, a sink, and ideally a tap with running water. Portable toilets or a plumbed cassette toilet cover sanitation.

Keep tanks inside the heated area where possible to avoid freezing, and insulate external pipe runs. A simple, accessible system is easier to maintain than a complex one you can't reach.

A diesel or gas heater transforms winter camping. Diesel heaters run from the vehicle tank and are efficient and safe when properly installed with an external exhaust. Gas is popular for cooking and is often combined with a gas heater.

For cooking, a two-burner hob is usually enough, with a separate oven being a luxury. Always fit a gas locker vented to the outside and a carbon monoxide alarm inside the living area.

A converted van must stay within its plated weight limits. Every item you add - batteries, water, furniture - eats into payload. Weigh the finished van and replate if necessary; driving overloaded risks fines and invalid insurance.

You'll need to inform the DVLA of changes to the vehicle's body type, and insure it as a campervan rather than a commercial van - proper conversion and documentation help secure motorhome insurance, which is often cheaper. An MOT and gas/electrical safety checks should be part of your sign-off.

Self-build costs vary enormously. A basic conversion can be done for a few thousand pounds, while a high-end build with lithium power, solar and a full kitchen can reach £15,000-£25,000 on top of the base vehicle.

Budget for the big-ticket items - insulation, electrics, windows, a bed system and the kitchen - and keep a 15-20% contingency. Track every purchase; costs creep up quickly and most builds overrun their first estimate.

Not sure which van and conversion approach suits you? Our advisor matches your budget, DIY experience and travel plans to the right base vehicle and conversion style.

Discover your conversion style