Square, round, hexagon or octagon? How each hot tub shape affects seating, water volume, the walls, tiling, plumbing and the cost of the cover, and which shape I’d pick for which build.
Stock tank sizes explained: 6ft, 8ft and 10ft round, oval and poly tanks, how much water they really hold, how many people fit, how much they weigh, and which size I’d pick for a hot tub or a plunge pool.
What does a cocktail pool really cost to build yourself in 2026? A line-by-line budget for a 12ft x 8ft DIY build, from the dig to the heat pump, in dollars and pounds.
How deep should a hot tub be? The water depth, seat heights, footwell and step sizes I design DIY hot tubs to, in feet and metres, and why they all depend on each other.
Imperial or metric plans? How to choose hot tub dimensions that suit the blocks, pipe, tiles and timber you can buy locally, plus the conversions and traps worth knowing.
Solar mats, plug-in heaters, spa packs, heat pumps or wood-fired? The realistic stock tank pool heater options, with heat-up times, running costs and safety.
Can you have a hot tub and a plunge pool in one project? Yes. Here are the four layouts that work, why the plumbing should stay separate, and how to size, heat and budget a DIY combo.
What does a DIY hot tub cost in 2026? A line-by-line breakdown of an 8ft x 8ft in-ground build, from the dig to the electrics, with US and UK price ranges.
his might just be the biggest challenge my DIY hot tub plans have ever faced. And no, I’m not being dramatic. Let me explain.
If you’ve followed the blog or the YouTube channel for any length of time, you’ll know the videos I love making most are the project intros — the ones where we meet a real DIYer at the very start of their build and follow them all the way through to that first warm soak. Well, this one’s a bit different, because the DIYer in question is a mate of mine. And he won’t mind me saying he’s not exactly a natural with the tools.
Four things I’d do differently if I built my DIY hot tub again: ICF, a dual pump system, a bigger control room and mosaic tiles.