Motorhomes Under vs Over 3,500kg: Which is Right for You?

Buying or hiring a motorhome is an exciting adventure, but one of the first big questions you need to consider is weight. Specifically: should you go for a motorhome under 3,500 kg, or are you prepared (and qualified) to drive one that’s heavier? Understanding how weight affects your driving licence entitlement, costs, insurance, and usability is essential.

Here at Chelston Motorhomes, we’ve helped many customers work through these questions. This guide aims to help you decide which motorhome category fits you best.

3,500 kg is a key legal boundary in the UK. It refers to the vehicle’s Maximum Authorised Mass (MAM), sometimes called Maximum Permitted Mass (MPM) or Gross Vehicle Weight (GVW). This is the total weight of the vehicle when loaded: the motorhome itself + fuel + water + people + luggage.

If your motorhome’s MAM is:

• At or under 3,500 kg, you can typically drive it on a standard Category B driving licence
• Over 3,500 kg, you may need additional licence entitlement (Category C1, or possibly even C) depending on the weight

Getting this right can avoid penalties, invalid insurance, and unsafe handling.

Breakdown of relevant licence categories in the UK

Licence Type: Category B

What it Allows: Standard car licence

Typical Weight Limit: Vehicles up to 3,500 kg MAM; up to 8 passenger seats

Licence Type: Category C1

What it Allows: Medium vehicles

Typical Weight Limit: Between 3,500 kg and 7,500 kg MAM

Licence Type: Category C

What it Allows: Large good vehicles

Typical Weight Limit: Over 7,500 kg MAM

If you passed your driving test before 1 January 1997, you may already hold C1 entitlement automatically. If after that, you may need to take additional tests to upgrade.

Advantages:

• Licence accessibility – Most people with a standard car licence (Category B) can drive these without further training
• Lower costs – Insurance, taxation (road tax / Vehicle Excise Duty), and possibly servicing and maintenance tend to be cheaper
• More flexible – Easier to drive, manoeuvre, park; less strain on roads and bridges; often better fuel economy
• Wider choice – Many more motorhomes fall into this class, so you’ll have more options to choose from

Drawbacks:

• Space & amenities trade-off – To keep weight down, manufacturers often limit features, water tank size, or storage
• Payload limitations – Once you add people, gear, water, fuel, you may find there’s not much margin before hitting the MAM. Overloading can lead to fines and insurance issues
• Less robustness – Heavier (over 3,500 kg) motorhomes often have more substantial chassis, suspension, braking, etc., which can feel more stable under load or in tougher conditions

Advantages:

• More space and comfort – Larger floorplans, bigger sleeping areas, more amenities, bigger storage and water tanks
• Greater stability – Often heavier chassis, more powerful engines, better suited for long-distance and heavier loads
• Luxury & features – More scope for high-spec fittings, luxury extras, generous insulation, larger fuel and waste/wastewater capacity

Drawbacks:

• Driving licence requirements – You may need Category C1 or higher. Upgrading requires training and test costs
• Higher running costs – Insurance, fuel consumption, servicing, and maintenance tend to rise. Taxes may also be higher
• Less manoeuvrable – Larger turns, more clearance needed, sometimes harder to park or take on narrow roads
• More burdensome regulation – Over certain weights you’ll have requirements like tachographs (depending on use), maybe stricter speed limits

• Always check the vehicle’s weight breakdown: kerb weight + max payload = MAM; make sure there’s enough margin for you, your kit, and extra stuff
• Use lightweight accessories where possible
• Be careful with water tanks (fill them up only when needed)
• Ask for a detailed weight assessment if possible

• Make sure you either hold the correct licence or are willing to get the qualification
• Budget for higher insurance, maintenance, and fuel
• Think carefully about parking, access, where you’ll stay (some campsites / roads may have limits)
• Ensure braking, tyres, suspension are well maintained, heavier vehicles place greater demands

There’s no one-size-fits-all answer. For many people, motorhomes under 3,500 kg make the most sense: licence-wise, financially, and logistically. But if your priorities are space, features, durability, and you’re prepared for higher costs and licensing demands, going over 3,500 kg could be the right choice.

If you’d like help understanding what your current licence covers or want to look at models on either side of the 3,500 kg line, we’d be very happy to assist. Bring your licence and tell us what you want in terms of space, amenities, and budget, at Chelston Motorhomes we’ll help you find the perfect match.