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Don't 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 Spa, Hot Tub, Swimspa or Plunge Pool!

  • Get my "Award Winning" Hot Tub Building Information Package! (voted the #1 How to DIY information guide for building Spas, Hot Tubs and Plunge Pools). Covers all the steps and details you need to Build Your Own Spa, Hot Tub, Plunge Pool, Cocktail Pool, Swim Spa or Exercise Pool - easy to follow books and videos!
  • The “All NEW” 2019 package includes 6 Books Packed with Spa and Hot Tub Building Information and Knowledge, Plus, now you get “TWO” complete Videos of actual Hot Tub Build Projects start to finish! Sit back and Watch as I take you through each of the "How to do it steps" needed to complete your own Spa, Hot Tub or Swim Spa!
  • In addition; You Get “TWO FREE DIY Bonus Books” that cover more awesome must have DIY backyard projects! A total of 8 books in all! – These books are all my newest revisions for 2019 and include the latest money saving tips and updates!
  • Here's the best part! As a Custom Built Spas customer, you can get FREE Unlimited Email and Over-the-Phone Consultation from me, an Industry Recognized Expert. - You'll get personal one on one Coaching help until your project is completed and up and running!
  • Custom Built Spas’ “How To Do It” information package is the “Gold Standard” for DIY information on Hot Tub building projects and is not available anywhere else! For over 20 years, Custom Built Spas has been helping customers, not just in the USA but around the world build spas and hot tubs! I know I can help you build a successful project!

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Meet the Expert, Gene Trumbull

Custom Built Spas was started as a Veteran Owned Business, established in 1999 by Gene Trumbull. Gene understands the desire and satisfaction fellow DIYers, (do it yourself), get by being able to construct and complete different kinds of projects by themselves. What he also came to realize was that when 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 can find a few videos on YouTube with all kinds of crazy ways to construct a spa or hot tub. But most of those quite honestly, produced results you would not be proud to show off in your own backyard.

In addition, the information that you were able to find, lacked way too many important and essential details, critical to someone looking to complete a successful spa or hot tub project. Armed with that knowledge, Gene made it his mission to turn building a spa, hot tub or swim spa into a very doable, high quality DIY project not only for himself, but for others as well. Long story short this all started almost 20 years ago!

Since then, Gene has become one of the nations most recognized and a leading authority 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 Gene has countless customer who have completed projects not just in the USA, but in many 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 it, who offers that kind of service these days? Go ahead and read through his testimonials page and see what customers have had to say!

Learn More About Gene and Custom Built Spas Buy Now

Real Results from our clients and others

(Directly from Instagram #CustomBuiltSpas)

  • There are so many ways you can build a DIY hot tub! Custom Built Spas takes the No Rules approach! However you want to build your hot tub, we can show you how and we can help you build it! Visit and see what we can do for you! #DIY,  #buildahottub,  #buildaspa,  #buildaplungepool, #buildaswimspa
  • How would this plunge pool look in your backyard? Did you know you can build this as a DIY project? And how about if you had an industry expert helping you every step of the way! FOR FREE! Visit and see what we have to offer and how we can help you!
  • In a few short weeks spring will be here! Custom Built Spas is ready and waiting to help you build your DIY hot tub, spa or plunge pool. Make more time for you and your family to relax and soak this  year and  let us help you every step of the way with your project. Visit and see how we can help you! #DIY, #hottubs, #plungepools, #smallpools
  • There are so many ways to build a DIY hot tub, small plunge pool, swimspa etc. We like to say No Rules. It can be in ground, above ground, any shape or size you want. Visit,, see what we can offer you! Remember, our help is always FREE! #DIY,  #swlmspas, #plungepools, #smallpools.
  • Make 2020 the year you get that hot tub you have always wanted! Maybe you wanted a swimspa or plunge pool of your own. Custom Built Spas will not only show you how to build your own, we will help you every step of the way for FREE! Visit and see what we can do for you! #DIY, #hottubs, #buildahottub, #buildaswimspa, #plungepools, #buildaplungepool.
  • Don't buy a hot tub, build one with the free help of an industry expert. Visit: #buildahottub, #DIY, #buildaspa, #backyardhottubs, #buildaswimspa, #diyplungepools
  • There are so many ways to build a DIY hot tub. The best part is that you can build one  any size or shape your want, no rules! And with Custom Built Spas as your build coach, you'll see how to save a bunch of money! Visit  and get all the information you need to build a hot tub, spa, swimspa or plunge pool of your own! #buildahottub, #DIY,  #spa, #plungepools, #buildaspa
  • Why spend a bunch of money to buy a hot tub or swimspa when you can build one yourself and save as much as 75% of the cost! Custom Built Spas will not only show you how we will help you every step of the way for FREE! Visit and see what we offer! #hottubs, #swlmspas, #DIY, #buildahottub, #plungepools, #diyhottubs, diyswimspa.
See More Customer Built Spas and Hot tubs

The Latest News

30 December

DIY Hot Tubs and More… the rage is catching on!

For over 20 years now, Custom Built Spas has been providing DIYers the most complete and most detailed information package on Spa and Hot tub building that can be found anywhere period! Our information package is the #1 Best Seller in this arena bar none, nobody does it bigger or better and nobody offers the […]

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10 July

Hot Tub Water Features

Hot Tub Water Features… the upsides and downsides! Over the years, some of my customers have elected to add some type of water feature to their spa, hot tub or plunge pool projects. These types of features are perfect compliments to a hot tub or plunge pool, they add ambiance, a little extra class, soothing […]

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3 March

Planning Your New DIY Hot Tub or Plunge Pool

With spring around the corner, DIYers like me, you and many others are getting the itch to get outside and start working on new projects we’ve been looking at and are considering building this year. For some of you that may include a new hot tub or plunge pool for you and your family. And […]

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