3.5t Horseboxes with Living for Sale in the UK

Horseboxes vary widely in weight depending on their size and build. A small 3.5-tonne horsebox (the kind you can drive on a standard car licence) typically weighs around 2,300–2,700kg unladen, leaving the rest as payload. Larger 7.5-tonne horse lorries are usually much heavier, often weighing 5,000–6,000kg empty, with bigger payload capacity and more living space.

A horsebox’s payload is the maximum weight it can legally carry, including horses, tack, people, and equipment. Payload varies by size - a typical 3.5-tonne horsebox often has a payload of 800kg–1,200kg, while larger 7.5-tonne lorries can offer 1,500kg–3,000kg or more, depending on the build and features. Build quality and unladen weight vary between manufacturers - for example, an Equi-Trek may differ in payload from an Oakley or Whittaker of similar gross weight, so always check the individual vehicle's weight plate.

For a deep dive into horsebox payloads, see our Understanding Horsebox Weights and Payloads blog post.

Adding living quarters to a 3.5t horsebox increases the unladen weight, which directly reduces the available payload. Features such as a kitchen unit, seating area, water tank, gas system and insulation can add 150-300 kg compared to a non-living build on the same chassis. Since the Maximum Authorised Mass stays fixed at 3,500 kg, that extra weight comes straight off the payload you have left for horses, tack and equipment.

A typical 3.5t horsebox without living might offer a payload of around 900-1,100 kg, while an equivalent model with living could drop to 700-900 kg. With a single horse weighing 400-600 kg and tack, hay, water and personal kit adding another 50-100 kg, a lower-payload living build can leave very little margin.

If living accommodation is important to you, look for builders who prioritise lightweight construction - aluminium bodies, composite panels and careful material choices can make a significant difference. Always check the VIN plate or weigh the vehicle on a public weighbridge before buying, and factor in everything you will carry on a typical day out.

For more on how payload works, see our Understanding Horsebox Weights and Payloads guide.

In the UK, you can drive a 3.5-tonne horsebox on a standard car licence (Category B). For anything over 3.5 tonnes - such as a 7.5t horsebox - you’ll need a Category C1 licence, and for even larger lorries you’ll need Category C (HGV). Your licence will show which categories you already hold, and if you passed your test before 1 January 1997, you may automatically have C1 entitlement.

For a deep dive into driving licence requirements, see our Horsebox Driving Licence Requirements in the UK blog post.