Before you ask.

Because the exact cost depends on things three sliders cannot know: ground conditions, access for the excavator, local permits. So the calculator gives you an honest guide figure. The binding fixed price, guaranteed in writing, comes from the free on-site appointment — and then it is exact to the franc.

Excavation including disposal, the sub-base, the complete patented Bio.design structure with EPDM membrane, the technology you choose, plus terrace and landscaping. One contact, one price — no juggling five trades.

In most municipalities in eastern Switzerland yes, but it is straightforward — because the build is non-invasive and has no concrete shell, the procedure is simpler. Köhn Gartenbau handles the application for you.

The EPDM membrane is elastic and adapts to ground movement instead of cracking. We guarantee 25+ years of water tightness — in practice considerably more, with minimal maintenance.

Very little. A cleaning robot and the well-thought-out filtration do most of the work. The sand-resin surface lets water flow through the grains and stays naturally clean — no constant scrubbing.

No. Unlike many systems, the water stays in — the elastic structure withstands frost. No draining, no refilling, no seasonal stress.

Usually 3–4 weeks, instead of the 8–12 weeks of a concrete pool with several trades. Because everything comes from one company, your garden is often finished the same summer — not the next one.

Yes. The pool is modelled freely — no off-the-shelf shell. We match the shape, the walk-in sand entry and the finish to your garden. You can view ten finishes in the configurator.