Custom Built Spas

Call Today: (860) 571-8440

Don’t Buy A HOT TUB

When You CAN Build One!

Professional Instructions Produce Incredible Results!


Get my “Award Winning” Hot Tub Building Information Package today (voted the #1 How to DIY information guide for building spas, hot tubs, and plunge pools) which includes 6 books packed with priceless information. Plus, now you get two videos of actual build projects from start to finish! Sit back and watch as I take you through each step needed to complete your own spa or hot tub.

If that wasn’t enough, you’ll also get two FREE bonus books covering more must-have DIY backyard projects and the latest money-saving tips. That’s 8 amazing books in total! But here’s the best part: being a Custom Built Spas customer means FREE, unlimited email and over-the-phone consultation from me, an industry-recognized expert.

Custom Built Spas’ “How-To” Information Package is the “gold standard” for DIY directions on Hot Tub building projects and is not available anywhere else! For over 22 years, Custom Built Spas has been helping customers everywhere build spas and hot tubs. I’ll guide you through the process until your project is fully completed and operational!


Joey P. Santa Rosa, CA

Joey P. Santa Rosa, CA

Working with Gene at Custom Built Spas was a great experience! His knowledge and willingness to...

Derek D.

Derek D.

Hello Gene, sorry it took so long to get these pictures to you. We actually sold this property a...


Established in 1999 by Gene Trumbull, Custom Built Spas was started as a Veteran Owned Business. Gene understands the satisfaction fellow DIYers get by being able to construct and complete different kinds of projects. While looking into building a hot tub, he also realized there was a serious lack of comprehensive instructions for this type of project. The few tutorials he managed to find yielded sub-par results or lacked many essential details. Therefore, Gene made it his mission to turn building a spa, hot tub, or swim spa into a very doable, high-quality DIY undertaking.

Since then, Gene has become one of the nation’s leading authorities on the subject. He has been interviewed by industry magazines such as Pool & Spa News, and articles from his project manuals have been featured on prominent “handyman” websites. Gene has helped countless homeowners complete projects in the US, as well as countries around the world.

Get your very own information package today, and let Gene become your personal spa-building coach. That’s a one-of-a-kind service you won’t find anywhere else. Discover what you can accomplish by reading through the testimonials page and seeing the beautiful spas Gene’s customers have built.

The Latest Resources



Remember, my Mission is to help you, as my customer, build a beautiful hot tub of your own! I can show you how to build Spas, Hot Tubs, Swim Spas, Plunge Pools, Cocktail Pools or Exercise Pools at incredibly affordable prices! Everything you need to know is outlined in my series of easy-to-follow books and videos that cover a simple, step-by-step process that I’ve developed and refined over the years.

I will teach and help you with everything you need to know about building your own spa, hot tub, or swim spa yourself, regardless of what your DIY skill levels are and at a cost, YOU determine YOU can afford. As my customer, I’ll work with you at your own pace until your project is done and comes to life! For over 20 years now I’ve been helping people just like you, build their own hot tubs, spas, and swim spa projects. So, are you’re ready to let me help you build your project? Then what are you waiting for, let’s do this!

Custom Built Spas