Call Today: (860) 571-8440

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 Spa, Hot Tub, Swimspa or Plunge Pool!

  • Get The Ultimate Hot Tub Building Information Package! This Award Winning “how to do it” DIY information guide outlines all the detailed steps You Need to Know to Build Your Own Spa, Hot Tub, Plunge Pool, Cocktail Pool, Swim Spa or Exercise Pool!
  • Our “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 we take you through each of the "How to do it steps" required to build your own Spa, Hot Tub or Swim Spa!
  • In addition; You Also Get “TWO Free DIY Bonus Books” covering more awesome must have DIY backyard projects! That's a total of 8 books in all! – These books are all our newest revisions for 2019 and include our 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. - I give you personal one on one Coaching help until your project is complete 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 provided help to customers, not just in the USA but around the world! We know we can help you build a successful project!

As seen on

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)

  • Serenity comes in many packages, how would this work for you? You can build something like this yourself and we can help you! Visit www.custombuiltspas.com and what we have to offer you! #DIYHOTTUB, #backyardprojects, #swimspa, #plungepool, #smallpool
  • A plunge pool in its simplicity! How cool would this be in your backyard! Do you know that you can build something like this yourself? You can and Custom Built Spas can show you how! Visit www.custombuiltspas.com and see what we can offer you! #DIY, #plungepool, #buildyourownhottub, #homeimprovement, #backyardprojects, #swimspa
  • Kudos to the owner of this perfect sized plunge pool! How would you like something like it in your backyard? Custom Built Spas can show you how to build one yourself and save a ton of money! Visit www.custombuiltspas.com for more details.  #plungepool, #DIY, #swimspa, #howtobuildahottub, #cocktailpool, #backyardprojects
  • Did you know that in many cases you can save money by building a hot tub or spa rather than buying One! Let Custom Built Spas show you how.  Our all new 2019 information package has everything you need to know! Visit www.custombuiltspas.com for more details. #DIYHOTTUB, #DIY, #plungepool, #swimspa, #homeimprovement
  • Would this be your ideal Plunge pool? Want to see how to build it yourself and save a ton of money! Visit www.custombuiltspas.com for more information. #plungepool, #DIY,  #swimspa, #howtobuildahottub
  • Learn how to build your own hot tub!
  • 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 www.custombuiltspas.com 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 www.custombuiltspas.com.  #DIYHOTTUB, #buildyourownhottub, #DIY,  #plungepool, #swimspa, #homeimprovement, #backyardprojects, #pool,  #cocktailpool
See More Customer Built Spas and Hot tubs

The Latest News

9 February

Party Pools

Party Pools… they are becoming the New rage! So, what are “Party Pools”? I mean we already have spas, hot tubs, swim spas, plunge pools, cocktail pools, exercise pools and now  “Party Pools”! Let’s talk about what it isn’t for a minute, then I’ll cover in depth what it is! First, it’s not one of […]

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25 January

Plunge Pools and Cocktail Pools Revisited

Plunge Pools and Cocktail Pools – Still the Fastest Growing “Must Haves” for Gen X and Baby Boomers? So just what’s driving the popularity of Plunge Pools and Cocktail Pools? Why do they continue to be the new rage? I stated once before that I don’t know anybody who doesn’t enjoy just relaxing in a […]

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3 January

YOUR Hot Tub Year is 2019

Is 2019 Your Hot tub Year? Custom Built Spas is excited about the New Year! We will be celebrating 20 years in business this year, a long way from our humble start in Charleston SC back in 1999. We had an idea and a goal to provide guys and gals like me who love to […]

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