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why buy a hot tub?

when you can build one!

How to Build a Hot Tub
Professional Instructions and Incredible Results!

Learn How to Build Your Own Custom Spa or Hot Tub

  • You Get The Ultimate Guide information package for Building Your Own Spa, Hot Tub, Plunge Pool, Cocktail Pool, Swim Spa or Exercise Pool!
  • Includes Six E-Books Packed with Industry Knowledge Plus 2 DIY Bonus Books covering a number of awesome must have backyard projects that are not hard to do!
  • FREE Unlimited Email and Over-the-Phone Industry Expert Consultation and Personal Coaching until your project is complete!
  • Plus a 2.5 Hour Instructional Video That Walks you Through a Step by Step process for building a Hot tub!

As seen on

Meet the Expert, Gene Trumbull

Custom Built Spas is A Veteran Owned DIY (Do-It-Yourself) Business established in 1999 by Gene Trumbull. Gene understands the desire and satisfaction fellow DIY enthusiasts get by being able to construct different kinds of projects for themselves. What he also came to understand was when he was looking into building a hot tub, there was virtually no high quality information for doing this type of project available anywhere. Oh sure you could find a few videos on YouTube with all kinds of crazy ways to construct a spa or hot tub. But most of this stuff quite honestly, produced results you would not be proud to have in your backyard.

In addition, the information you could find, lacked far too many important essential details, critical to someone working to complete a successful spa or hot tub project. Armed with that knowledge, Gene made it his mission and desire to turn building a spa or hot tub into a very doable, quality DIY project not only for himself, but for others as well. Long story short that was over 17 years ago!

Since then, Gene has become one of the nations recognized leading authorities on spa, hot tub, swim spa, plunge pool, cocktail pool and exercise pool building. He has been interviewed by industry magazines such as Pool & Spa News and articles on his project manuals have been posted on several prominent "handyman" web sites over the last several years, plus he has countless customer completed projects not just in the US but around the world!

But here is what is so unique about what Gene and Custom Built Spas offers to anyone buying his spa, hot tub and swim spa building information package, they can get FREE one on one personalized coaching help on their own project until it’s done. As Gene puts it, “I become your personal spa building Coach!” Think about it, who offers that kind of service these days? Go ahead and read through the rest of site pages and get excited about what you can learn to do.

Learn More About Gene Buy Now

Real Results from our clients

(Directly from Instagram #CustomBuiltSpas)

  • Here is a great example of a customer built DIY hot tub. Visit, see more customer hot tubs and learn how to build one of your own.
  • Customer built hot tub inside an existing green house Vermont USA. Want how to info, visit
  • Whether it's a hot tub, spa, swim, spa, plunge pool or cocktail pool Custom Built Spas can show you how to build.
  • Friends enjoying our DIY Custom Built Spas Hot  Tub
  • You could be relaxing in your own hot tub right now! Let Custom Built Spas show you how! Visit
  • Beautiful hot tub built by Custom Built Spas customer Roger N. San Diego CA. See more at
  • DIY hot tub built by Custom Built Spas customer. Visit and see more hot tub projects.
  • Zack L. In WA enjoying his hot tub on a snowy day.  Top pick of Custom Built Spas
See More Custom Built Spas

The Latest News

27 June

Hot Tub Makeover

Sometimes things happen that you have no control over and can cause you a lot of grief and aggravation. I’m going to share with you a series of events that I experienced over the last several months that will highlight this and share with you what led to having to do my own hot tub […]

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12 May

Buying a Hot Tub

Some of you reading this article may have already purchased and read one of my do it yourself spa manuals but decided that the project is a little more than you feel comfortable tackling. I understand this and I thank you again for your purchase and at least considering the do it yourself spa. In […]

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2 May

Backyard Hot Tubs

Previously I did a blog on DIY hot tubs. In the blog, the theme that was being identified was, exactly what is a DIY hot tub or spa. DIY or backyard hot tubs should not to be considered anything less in quality than a store bought tub or contractor built hot tub. However, I’ve got […]

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