Call Today: (860) 571-8440

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)

  • 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
  • Hottub built by my customer Sebi T. In Wethersfield ct
  • My hot tub with the new color changing light
See More Custom Built Spas

The Latest News

25 April

Hot Tub Customers

Over the 18 plus years I’ve been in business teaching and helping customers build their own hot tubs and spa projects, I have accumulated quite a number of testimonials and comments from my hot tub customers along with pictures of projects these hot tub customers have gone on to build. They have built spas and […]

read more
6 April

Hot Tub Performance

I can’t think of anything more frustrating than just buying a new hot tub, getting it home, getting it all set up, jumping in, hitting the jets button, only to find the hot tub performance is not what you expected. This actually happens a lot more than you would think! Why? Let’s dive into this […]

read more
17 March

Hot Tub Insulation

The value of a well-insulated spa! In a previous blog, I talked about electric heat vs. gas heat and how electric heaters for spas work. Whichever heating method you choose for your spa, you’re going to want to maximize the efficiency of your spa to reduce operating cost. Proper hot tub insulation will help achieve […]

read more