Wiltshire’s Horsebox Conversion Specialists

Horsebox conversions are where we started back in 2005. From the initial enquiry through to the handover and delivery, we’ll be with you every step of the way.

We specialise in 3.5t conversions as well as being regularly asked to convert 7.5t horseboxes which we can do with ease.

The journey begins by identifying your requirements and what you are looking for from the box, as well as the discipline in which you are involved (as this may have a bearing on the internal and locker layout).

Once you are happy with your design we can source a suitable chassis for you. This could be a previously used chassis from one of our main suppliers or a brand new chassis direct from the factory.

Horsebox Conversions from GR Conversions - Wiltshire

Our most popular horsebox conversion models

As our focus is on safety. We our known for our unique ‘Double Bulkhead’ design which separates the horse area from the driver. Our three most popular horsebox conversion models are; the Jura, the Iona and the Transporter.

The Jura Horsebox Conversion by GR Conversions - Wiltshire

Our Jura conversion is based on a conventional breast bar design with small living area designed to suit your specific requirements. Tack lockers can be internal or external.

Starts from £22,000 + VAT

Wiltshire Horsebox Conversions -The Iona - from GR Conversions

Our Iona model benefits from an extended chassis with the option to uprate the vehicles gross weight to 3.9t or 4.5t. This provides you with extra payload and room for more Living furniture and fixtures.

Starts from £25,000 + VAT

Horsebox Conversions - The Transporter - by GR Conversions - Wiltshire

Our Transporter conversion provides you with a complete caged design with the option of a breast bar. This model has proved very popular with people concerned about horses climbing over the breast bar.

Starts from £28,000 + VAT

Horsebox Conversions – Features

We provide the following as standard in all our builds:

  • Horse Area
  • Half Ramp – With grip top rubber and gas strut rams.
  • Flip up Top door
  • Double bulkhead between horse area & cab
  • Two Horse Head windows with bars (Iona Model has 2 extra windows)
  • Single Partition EVA wall matting.
  • Single piece Rubber floor matting
  • LED Lighting to horse area
  • Tie rings
  • Breast bar to 135cm with integral door
  • Large door to rear
  • Horse Camera
  • Luton Storage
  • Living Area
  • Boxed Seating
  • Internal/external Tack locker with 2 black bridle hooks & 2 black saddle racks
  • Storage


  • Fibreglass Luton Pod and ears
  • Tie up rings (x2)
  • Our standard graphics
  • Rub Rail
  • Sprayed in a single colour of your choice

 Optional extras

  • Seat Pads
  • Barn style doors
  • Bonded windows
  • Small locker to the rear for water tank, pump and hose
  • Wardrobe with door and hanging rail
  • Leisure Battery and split charging system
  • Metalic Paint
  • Reversing camera
  • Luton doors
  • Loading Lights
  • Tack locker lights
  • Roof vents
  • USB ports
Internal features in a Converted Horsebox - by GR Conversions
A Quality Finish comes as standard with Horsebox Conversions from GR Conversions of Wiltshire
The inside of a Converted Horsebox by GR Conversions - Wiltshire
GR Conversions working on another quality Horsebox Conversion

We can offer a wide variety of layouts and options, whether it be a two-horse with large living area or a 4-horse hunting style lorry with just tack storage up front. We provide a detailed pricing breakdown which means you can create your own lorry to suit your budget.

GR Conversions about to start work on another quality activity vehicle conversion
A Horsebox Conversion Project underway with GR Conversions of Wiltshire
Almost Finished - Another High Quality Horsebox Conversion from GR Conversions of Wiltshire
Sparkling New Horsebox Conversion from Wiltshire's Horsebox Conversion Specialists at GR Conversions


The build begins once you’ve agreed your design and signed an initial agreement with us and we’re able to schedule a build slot in our workshop.  You can either provide your own chassis for conversion or we can source one for you.

We will send you regular email and telephone updates and include photos of your build progressing.  You’re welcome to visit our workshop at any time to see the progress for yourself.

Our standard build slot is 8 weeks.


Once we’ve completed your build we will arrange a collection day with you to go through the handover. We will show you how it all works and answer any questions you may have.  We’ll spend as long as necessary with you until you’re happy to turn the key.


The journey doesn’t end there as we provide a 12 month build warranty in addition to any manufacturer’s or appliance warranty.  We’re here on the end of the phone whenever you need us, or just drop us an email and we’ll get back to you as soon as we can.  If you have any issues, just bring the vehicle back to us and we’ll take a look at it there and then.

Call us now on 01793 854053
or email sales@gr-conversions.co.uk for an initial consultation.

I can’t recommend GR Conversions highly enough, David, Tammy and the team made the whole process of building my horsebox so easy and friendly. Their expertise and consideration of the safety of my horse was one of the main reasons I chose them and nothing was too much trouble for them. The end result is my perfect horse box, which I am over the moon with and that everyone is constantly admiring!