Custom Built Spas
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About Building a DIY Hot Tub

Mar 4, 2020 | Building or Buying a Hot Tub

How many times have you said to yourself, “I wish I had a Hot Tub or spa”, maybe a “plunge pool” or “Swim Spa”? But then you answer your own question why you don’t have one, “I just can’t afford it”. You may be right, the quality ones you see in retail outlets are expensive! The thing is, “buying” a hot tub isn’t your only option! You might want to take a hard look at building your own hot tub!

Ok, I get it, the first thought that may come into your head is “I can’t do that”. In reality, about 90% of you that have done any kind of DIY project before, can build your own hot tub, all you need is a little help and guidance from an expert. Someone who has been through the process many, many times, and can coach you every step of the way as well as be available to answer any questions you have along the way. (That would be me!).

hot tub construction  DIY customers from SC  DIY hot tub construction

With a little help you can do all the steps shown above!

DIY Hot Tubs are not as difficult to build as people may be led to think. And please don’t listen to any negative friends and neighbors who tell you that you can’t build a hot tub or plunge pool. Over the years, I’ve had blue collar workers, white collar workers, CEOs, lawyers, doctors, dentists, just about anybody you can think of build their own hot tub. And yes, I’ve had a few women do this project as well, with great results I might add! Take a quick look at what a few of my customers have had to say and what they built:

Most of the processes required to build a basic DIY Hot Tub are well within the capabilities of the average homeowner. Have you ever heard the saying “If you think you can or you think you can’t, your right”. That’s pretty much how it is with a hot tub project. As I said above, many people who want to do a DIY Hot Tub project, just need some expert guidance and a source for detailed step by step information along with a little personal coaching help.

One of the things I have a pet peeve with is that many instructional books are great at telling what to do, but then severely lack the details of “just how to actually do what they are telling you to do”. Any of you experience that besides me? I’m sure you have!

This is where you’ll find working with Custom Built Spas to be much different! Yes, I have an information package I’d like you to purchase. The package contains a series of books I’ve written that are highly detailed, with lots of descriptions, lot of pictures and lots of diagrams to help guide you. My information package also includes 2 complete videos showing a hot tub being built from start to finish. Video 1 is two and a half hours long with a ton of detail, maybe more than what some of you really need. Video 2 is forty minutes long covering another hot tub build from start to finish. This video covers the changes and updates I’ve made over the years, and several of the processes that I’ve made easier for you, plus a whole lot more. I’ve also built a library of short video clips that cover specific details that might be helpful to some of you that undertake a project. I’ve found that (some hot tub builders just need a little more help than others), I’m happy to provide that help.

And, here’s the best part! You can always call me, email me, send me pictures or video clips of what you’re doing or where you’re at or what you might be stuck on, and I’ll work you through the issue. The DIY hot tub process starts with my info package that you can get here on my website:

For over 20 years now, I’ve made a business out of teaching people just like you how to build their own DIY Hot Tubs. Recently, I’ve expanded that to building your own swim spa, plunge pool, exercise pool or cocktail pool. (all included in my information package). What’s most exciting about these types of projects is that the skills and confidence you’re going to gain, will help you tackle many more DIY projects around your home. And here’s a little secret… the only difference between you doing a project like this vs a commercial hot tub builder doing this project is the speed in which the project gets done.

Here’s something else you may not know. Here in the US you would think that there are literally thousands of contractors around the country that build hot tubs, you may be surprised to know that there are not that many. Portable hot tub installers are everywhere, but those who specialize in just building hot tubs are much more difficult to find. Over the years, I can’t tell how many times I’ve heard my customers say that the reason they decided to build their own DIY hot tub is because they couldn’t find anyone to build it for them. And when they could find someone to build it, the price the quote was nothing short of outrageous. (If you’re a contractor, keep that little bit of valuable information tucked in the back of your head).

One of the more important considerations you’re going to need to address when planning a DIY Hot Tub project, is where are your going to locate the tub. You may think the answer is straight forward enough and common sense might seem to be a governing factor for location. However, there are over a dozen important factors to consider when choosing the right location for your unit. Some of these will be obvious but, several will not be so obvious to an inexperienced DIYer. Here again is where I and my information guide will help you. My hot tub building package covers all the aspects you need to address and to think about. The information I provide will save you time, money and from making what could be costly mistakes right from the beginning, easily offsetting the information package cost.

One important aspect I cover that you should consider carefully, is the size of your DIY Hot Tub. The bigger the better is not the best approach to take. The basic difference in cost for example of a 6-foot square tub vs an 8-foot square tub is not that much. However, the size increase could add as much as 20% to the operating cost. I cover sizing your hot tub project in a lot of detail in my information package. So be sure to spend a little time on this when you read this section. A few of the other things I talk about are the number of people that will regularly use your hot tub as well as rules of thumb for determining the number of jets to install and the type of heating to consider.

Needless to say, I could just continue to outline more and more of what I cover in my DIY Hot Tub books. But, the real goal with this blog is to give you enough of an inside glimpse of the kind of information you can expect to find in my publications, so that you feel confident that you’re going to get way more than your money’s worth. I cover these projects from A-Z and everything in between. I also help you select as well as supply all the parts and equipment you will need for your project, delivered right to your door. And don’t forget, as my customer, you can call me or email me anytime during your project, construction until it’s completed and running. Of course, you can call after your hot tub is done too if you have other questions on its operation, water chemistry etc.… Anything you get stuck on or are not sure of, contact me first.


Thanks for the visit!
I’m looking forward to working with you!!

diy hot tub by custom_built_spas

Gene Trumbull
Custom Built Spas

Call With Questions (860) 571-8440



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 25 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