Onyx Vans - Campervan Converter
Onyx Vans logo
5.0 Google Rating (7 reviews) 3+ Years in Business

Onyx Vans

Campervan Converter in Horsham, West Sussex

Onyx Vans is a West Sussex-based specialist in luxury off-grid adventure van conversions, offering both custom builds and pre-built vans for sale.

About Onyx Vans

Onyx Vans, established in 2021, operates from a 3000 sq ft workshop located on an idyllic farm in Horsham, West Sussex. The company is dedicated to creating exceptional off-grid adventure vans, overland vehicles, and expedition trucks. Their approach is deeply inspired by the gemstone Onyx, reflecting a commitment to durability and resilience in every build. The small, highly experienced team, led by owners Chris and Heather, provides a personalized service, ensuring each campervan is tailored to the client's specific lifestyle and adventure needs.

The company's ethos centers on listening to clients, maintaining simplicity in robust system design, and focusing on meticulous details to ensure longevity and functionality on the open road. Onyx Vans prides itself on gas-free builds as standard, integrating advanced off-grid electrical systems featuring full Victron components, including LiFePO4 batteries, high-power inverters, solar panels, and DC/DC chargers. Their conversions also incorporate four-season insulation, comprehensive water systems with insulated tanks, AquaHot heating for warmth and limitless hot water, and innovative space-saving solutions like pop-up indoor showers and composting toilets.

Onyx Vans offers a range of services, from selling completed adventure vans with signature layouts to undertaking custom conversions primarily on MAN TGE, VW Crafter, and Mercedes Sprinter base vehicles. Their builds are designed for year-round exploration, featuring practical elements such as ample storage, dedicated bike garages with secure mounting options, and outdoor wash-down points. The company actively showcases its craftsmanship and designs at industry events like the Motorhome and Caravan Show and the National 4x4 and Camper Festival, demonstrating their commitment to quality and innovation in the UK campervan conversion market.

What Customers Say

8 reviews from verified customers

Customers say

Customers consistently praise Onyx Vans for their high-quality craftsmanship and exceptional attention to detail, delivering dream-like campervan conversions. They highly value the professional, friendly service, expert advice, and transparent communication provided by Chris and Heather throughout the build process. Additionally, clients appreciate the ongoing support and willingness to go above and beyond expectations, ensuring complete satisfaction.

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Google Reviews

5.0(5 reviews)
★★★★★
12 October 2025

Onyx created the van of my dreams. I work in interiors and had a clear vision of what I wanted. Flexibility in the layout and uncompromising quality were key. I searched the South East for the right partner to bring it to life, visiting three van builders in total. Onyx was the last, and wow, what a difference. The workshop was professional, spotless, and equipped with the latest machinery. I could tell straight away that they cared about the details. Great coffee and a lot of Yeti cups. Always a good sign! Chris and Heather were fantastic to work with. We visited the workshop multiple times during the build to work through the finer details. Communication was excellent, costs were transparent, and they weren’t afraid to push back on a few of my ideas. The van is better for it. The finishing detail is second to none. Since picking it up in April, we’ve used it almost every weekend, and we absolutely love it. The aftercare has been brilliant too. They’re always at the end of the phone if we need anything. I’d recommend Onyx Vans in a heartbeat.

Debbie WilliamsonDebbie Williamson
★★★★★
8 October 2025

We couldn't be happier with our experience with Onyx Vans! From the very beginning, the planning process was incredibly easy and professional. Heather and Chris really took the time to understand our vision and offered thoughtful suggestions that helped bring everything together perfectly. Communication was always clear and timely, and we felt involved every step of the way. The end result? A custom camper van that completely exceeded our expectations. Every detail was executed with care and precision, and it truly feels like our dream van come to life.

Seb KSeb K
★★★★★
23 April 2025

Booked in with Onyx Vans when our water tank fell off the back of our 2016 sprinter - they refitted the tank to a much better standard than the previous fitters, made our gas tank safer/the shut off more accessible and checked over our gas system (which had stopped working at the same time as the water tank issue). Within a few hours all was fixed ready for our next adventure in the van. Heather and Chris kept all costs transparent throughout and checked in midway through the job to update on next steps and if we wanted to take them. They left us with some great advice for the future. 10/10 completely recommend - feel lucky to have found such a good camper specialist local to us. Will definitely be back to them when we need any other van attention or changes.

Holly OliverHolly Oliver
★★★★★
10 January 2025

I’ve had an absolutely great experience with Onyx Vans, delivering a very professional and high standard work. I value their honesty and quality of work very much. They are friendly, helpful and give you the best advice for your needs so that you get the best outcome. They pay special attention to detail and resolve to finish the work quickly, which is great and they go above and beyond expectations. I have a great deal of respect for this team and recommend them 100%.

N GoudriaanN Goudriaan
★★★★★
10 February 2024

Chris and Heather helped us to convert our first campervan and they were wonderful to work with; they have a clear passion for vanlife and are really knowledgable, especially with van electrics, services, layout and the details that matter when you are off-grid. We couldn't be happier with the results - we love our camper and are grateful for all the tips Chris and Heather have given us, both while they were helping us with the convert, and after it was finished we were able to call them for support. 10/10 would recommend to anyone looking to convert!

Natalie GoodNatalie Good
💬

Customer Testimonials

3 testimonials from Onyx Vans's website
★★★★★
14 January 2026

I’ve had an absolutely great experience with Onyx Vans, delivering a very professional and high standard work. I value their honesty and quality of work very much. They are friendly, helpful and give you the best advice for your needs so that you get the best outcome. They pay special attention to detail and resolve to finish the work quickly, which is great and they go above and beyond expectations. I have a great deal of respect for this team and recommend them 100%.

Nita G
★★★★★
14 January 2026

Chris and Heather helped us to convert our first campervan and they were wonderful to work with; they have a clear passion for vanlife and are really knowledgable, especially with van electrics, services, layout and the details that matter when you are off-grid. We couldn't be happier with the results - we love our camper and are grateful for all the tips Chris and Heather have given us, both while they were helping us with the convert, and after it was finished we were able to call them for support. 10/10 would recommend to anyone looking to convert!

Natalie G
★★★★★
14 January 2026

Onyx created the van of my dreams. I work in interiors and had a clear vision of what I wanted. Flexibility in the layout and uncompromising quality were key. I searched the South East for the right partner to bring it to life, visiting three van builders in total. Onyx was the last, and wow, what a difference. The workshop was professional, spotless, and equipped with the latest machinery. I could tell straight away that they cared about the details. Great coffee and a lot of Yeti cups. Always a good sign! Chris and Heather were fantastic to work with. We visited the workshop multiple times during the build to work through the finer details. Communication was excellent, costs were transparent, and they weren’t afraid to push back on a few of my ideas. The van is better for it. The finishing detail is second to none. Since picking it up in April, we’ve used it almost every weekend, and we absolutely love it. The aftercare has been brilliant too. They’re always at the end of the phone if we need anything. I’d recommend Onyx Vans in a heartbeat.

Debbie W.

Contact Onyx Vans

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Location

Our Work

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Get In Touch

ADDRESS

Unit 2, Tickfold Farm, Marches Road, Kingsfold
Horsham, West Sussex, RH12 3SE

CONNECT WITH US

Team: Small family business (2-5 people)

5.0 (8 reviews) Contact Onyx Vans
or call directly
01403 458668 www.onyxvans.com

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