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Why buy a hot tub?

When you can build one!

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

Learn How to Build Your Own Custom Hot Tub, Swimspa, Spa or Plunge Pool!

  • Get The Ultimate Hot Tub Building Guide, a Guide Featuring all the Detailed Information You Need to Know for Building Your Own Spa, Hot Tub, Plunge Pool, Cocktail Pool, Swim Spa or Exercise Pool!
  • This package includes 6 E-Books Packed with Spa and Hot Tub Building Information and Knowledge, Plus 2.5 Hours of Video Instruction Where You Are Walked Through Each of the "How to do it steps" required for building your own Spa or Hot Tub start to finish!
  • You Also Get 2 DIY Bonus Books covering more awesome must have backyard projects that are easy to do! That's a total of 8 books - all are my latest revisions with all my latest money saving tips and updates!
  • Here's the best part! As my customer you'll get FREE Unlimited Email and Over-the-Phone Consultation from me, an Industry Recognized Expert. - I give you personal one on one Coaching help until your project is complete and is up and running!

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Meet the Expert, Gene Trumbull

Custom Built Spas is A Veteran Owned Business established in 1999 by Gene Trumbull. Gene understands the desire and satisfaction fellow DIY (do it yourself) enthusiasts get by being able to construct different kinds of projects by themselves. What he also came to understand was when he was looking into building a hot tub, there was virtually no real quality DIY information available anywhere for doing this type of project. 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, high quality DIY project not only for himself, but for others as well. Long story short that was over 18 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 USA but several other countries around the world!

Here's what's 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 this, who offers that kind of service these days? Go ahead and read through the rest of site pages and get excited about what you are about to learn.

Learn More About Gene and Custom Built Spas Buy Now

Real Results from our clients and others

(Directly from Instagram #CustomBuiltSpas)

  • Instagram Image
  • Cooler weather is coming, what better way is there to enjoy it than relaxing in your own backyard hot tub. Custom Built Spas can show you how to build one yourself with our detailed books and video on how to do this. Visit to learn more! #DIYHOTTUB, #buildyourownhottub, #plungepool, #DIY, #swimspa, #homeimprovement, #backyardprojects, #Jacuzzi
  • Another great example of a hot tub with a simple water feature. This is a perfect project for a DIYER. Custom Built Spas will show you how to build this unit and give you Free help. Visit  #DIYHOTTUB, #buildyourownhottub, #DIY,  #plungepool, #swimspa, #homeimprovement, #backyardprojects, #pool,  #cocktailpool
  • Who says only guys can build their own spa or hot tub. Custom Built Spas has had a number of women build their own hot tub over the years,  and they have done really nice units. Visit and see how you can build your own hot tub. #DIYHOTTUB,#DIY, #plungepool, #swimspa, #howtobuildahottub, #cocktailpool, #backyardprojects, #Jacuzzi, #homeimprovement
  • Did you know that in these dog days of summer you can actually feel cooled off in your hot tub. If you adjust set temperature below body temperature you will feel cooled off and comfortable! Build your own custom hot tub now, Custom Built Spas can help you every step of the way!  #DIYHOTTUB, #swimspa, #howtobuildahottub, #cocktailpool, #backyardprojects, #custombuiltspas, #plungepool, #DIY
  • With the summer heat upon us, you might think being in a hot tub is the last place you want to be. But did you know that if you set the tubs temperature one or two  degrees below body temperature you can actually feel like you're cooling off and feel refreshed. Visit and see how to build your own hot tub, save thousands! #DIYHOTTUB, #buildyourownspa, #buildyourownhottub, #DIY, #plungepool, #swimspa, #homeimprovement, #backyardprojects
  • Girls Dance company enjoying a relaxing soak in a DIY Hot tub built by Custom Built Spas. Learn how to build your own hot tub at, #DIYHOTTUB, #hottub, #buildyourownspa, #buildyourownhottub, #homeimprovement, #backyardprojects, #swimspa, #plungepool
  • Hot Tubs with no rules and no limits.  That's what Custom Built Spas can offer you! You get to have it your way and we will help you do it! Visit and see what we can offer you as well as what some of our other customers have done! #DIYHOTTUB, #backyardprojects, #buildyourownspa, #DIY, #plungepool, #swimspa, #howtobuildahottub, #cocktailpool, #besthottubs, #homeimprovement, #customspas, #custombuiltspas
See More Customer Built Spas and Hot tubs

The Latest News

25 July

Hot Tub Sanitation

There are several ways spas, hot tubs, swim spas and pools are kept clean and sanitary. Over the years the debate as to what are the best hot tub sanitation methods is always a hot topic for discussion and the debate is likely to continue on until something new and revolutionary comes along. Before we […]

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15 May

Best Hot tub

Whether you’re searching online or visiting a retail outlet store in your quest to find the Best Hot Tub, do you really know what you are actually looking for? How do you define the Best Hot tub? Well, it is somewhat subjective, however, I can provide you a list of criteria that should be part […]

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29 April

DIY Hot Tub Construction

Custom Built Spas has been helping the DIY (do it yourself) enthusiast and small contractors for over 18 years perfecting their skills on how to build spas, hot tubs, swimspas, plunge pools and more. DIY Hot Tub Construction may sound a little intimidating at first, and that’s understood. Once you become familiar with our construction […]

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