Trout 40
40 ft round71,000 gal
Pool library / Otter 38
Round natural swimming pool
Otter 38: a 38 ft round swim pond
Concept rendering
What it costs to build
Likely cost in Utah for each way to build it, from doing all the work yourself to having it fully built for you. The designer reprices it for your state and your yard.
| Wild Builder | $44,800 to $61,800 | $51,800 |
| Guided Build | $51,100 to $71,500 | $58,600 |
| Partner Build | $138,700 to $179,100 | $155,000 |
| Turnkey Oasis | $156,900 to $203,500 | $175,900 |
How this pool works
Otter 38 pairs a 38 ft round swimming zone with about 1,144 square feet of planted regeneration zone, roughly half the water surface. The swim zone is built as straight concrete block walls. A pump pulls water through a gravel and shale filter under the plants, where bacteria and roots strip out the nutrients algae would eat, then returns it clean over the rock cascade. No chlorine, no salt, and the water stays clear because something other than algae eats first.
Every number on this page comes from the same engine as the designer: the dig, liner, filter media, plumbing, pump, plants and finish work for this exact layout. Open it in the designer to fit it to your yard, or book a free 10-minute call to talk it through.
