Custom Camper Vans. Built by Hand.

We've been converting vans since 1994, and in Sebastopol since 2002. Pop-tops, full builds, and everything in between.

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Or call us: (888) 332-9602

What We Do

GTRV has been building custom camper van conversions in Sebastopol, California for over 30 years. Every build starts with a conversation about how you actually travel, not a package you pick from a menu.

We do pop-tops, full builds, and everything in between on Ford Transit, Mercedes Sprinter, Ram ProMaster, and Toyota Sienna.

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Not Sure Where to Start?

Most people aren't. Answer a few questions about how you want to use your van and we'll point you in the right direction. Takes about 3 minutes. No commitment.

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Our Vans

a white ford transit

Ford Transit

The most popular full-size platform in the US. High roof and pop-top options. Good for full-time travelers and weekend campers alike.

View Transit
a grey Mercedes Sprinter

Mercedes Sprinter

The original benchmark. AWD available. Excellent for longer trips and higher build complexity.

View Sprinter
a black RAM ProMaster

RAM ProMaster

Easier to park, more budget-accessible. Pop-top available. Front-wheel drive and a wide, flat floor.

View ProMaster
A Toyota Sienna with a pop-top roof

Toyota Sienna

The only minivan we convert. AWD standard. Our garageable pop-top Sienna is one of the most popular builds we do.

View Sienna

What’s Next:

The RAM ProMaster City

Render of upcoming RAM ProMaster City

The RAM ProMaster City is the first genuinely new small van platform to hit the US market in years. Smaller footprint than a Transit. Easier to park. Still garageable with a pop-top. We've been doing design work on it since the specs dropped, and we're taking deposits now, before the vans arrive.

If you've been waiting for a smaller, more practical option, this is it. Getting in early means first priority on scheduling when Q1 2027 inventory lands.

Coming Q1 2027

Reserve Your Build Slot

From Our Customers

Worth Reading First

Blog
High Roof vs. Pop Top: How to Decide
High Roof vs. Pop Top: How to Decide

The roof decision shapes more of your camper van build than most people expect. Here's what actually changes between a high roof and a pop top, and how to figure out which one fits your situation.

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A First-Time Buyer's Guide to Camper Vans
A First-Time Buyer's Guide to Camper Vans

If you've been researching camper vans and not sure where to start, this guide walks through what actually matters early on. From choosing a platform to understanding costs to knowing which questions are worth your time before you commit.

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The 80/20 Rule of Van Design: Build for the Life You’ll Actually Live
The 80/20 Rule of Van Design: Build for the Life You’ll Actually Live

It’s easy to design a van for every possible scenario. It’s harder—and far more rewarding—to design it for how you’ll actually live. The 80/20 rule offers a simpler way to think about van design, focusing on what really matters day to day.

Read more →

FAQ’s

  • We build on four platforms: Ford Transit, Mercedes Sprinter, Ram ProMaster, and Toyota Sienna. Each one suits a different kind of traveler. Our platform comparison guide can help you figure out which one fits your situation. We're also developing builds for the 2027 Ram ProMaster City.

  • It depends on the platform, the scope of the build, and what you need inside. A pop-top installation on an existing van is a different conversation than a full custom conversion from scratch. The best way to get a realistic range is to tell us a little about what you're looking for, and we'll walk you through what to expect.

  • A pop-top is a roof section that raises up to give you standing room inside the van, then folds flat when you're driving or parked. It's what keeps a van garageable while still being comfortable to live in. Pop-tops are our specialty, and about half of the people who contact us are asking about them.

  • Timelines vary depending on the type of build. A pop-top installation takes less time than a full custom conversion. We'll give you a realistic estimate once we know the scope of your project. The best place to start is a conversation about what you need.

  • Yes. We're in Sebastopol, California, and we're happy to have visitors. If you're in the area or planning a trip through, give us a call at (888) 332-9602 and we'll set up a time to walk you through the shop.