The full-sand freshwater lagoon
From where we stand as the builder, a full-sand lagoon starts with the basin. It is a true 100% sand basin, not a sand ledge poured over a concrete shell. Your feet are on sand the entire time you are in the water, and the freshwater above it is kept clear by UV disinfection running in a closed-loop system, with zero water waste.
Entry is a real beach gradient, the kind you walk into rather than climb down. There are no steps and no ladders. Because the system is engineered rather than dosed with chemicals, operating cost generally runs lower than a traditional pool, though we won't put a number on that here since it depends on your specific build.
If you want to see the lagoon in full, from the models we build to the way each one is customized to a property, that detail lives on our lagoons page. Our line includes the Anse, Crique, and Calanque, each a different take on the same full-sand, freshwater approach.
The "lagoon-style" pool
A "lagoon-style" pool starts life as a conventionally built pool. The builder shapes it into an organic, irregular outline instead of a rectangle, then finishes the shallow end with a pebble or sand ledge to suggest a beach. From a few feet away, it can look convincingly lagoon-ish.
Underneath the finish, though, it is still a hard pool shell holding chemically treated water. That is the honest, structural answer to "is this just an expensive pool with a sand ledge?" The shape changed. The basin and the water did not.
The natural pool / swimming pond
A natural pool, or swimming pond, genuinely is chemical-free. It stays clear through a planted regeneration zone built alongside the swimming area, where aquatic plants and biological processes do the filtering work that chemicals or a sand basin would otherwise do.
That trade brings its own upkeep: plant management instead of chemical dosing. It is a different commitment than either a chlorinated pool or a full-sand lagoon, and worth understanding on its own terms. If you are weighing what day-to-day upkeep really looks like for a full-sand freshwater lagoon specifically, we go into that in detail on how it works.
The comparison
The real difference is structural, what the basin is made of and how the water stays clear, not just how the edges are finished.
| Feature | Full-sand freshwater lagoon | "Lagoon-style" pool | Natural pool / pond |
|---|---|---|---|
| Basin / bottom | 100% sand basin | Conventionally built pool shell with a pebble or sand ledge | Gravel, stone, or earth with a planted filter zone |
| Water type | Freshwater | Chemically treated pool water | Freshwater, biologically filtered |
| How it stays clear | UV disinfection, closed-loop, zero water waste | Chlorine or standard chemical dosing | A planted regeneration zone |
| Entry | Gentle beach gradient, no steps or ladders | Steps, ladders, or a hard pool edge | Varies, often a dock or hard edge |
| Chemicals | None | Standard chlorine/chemical demand | None |
| Look & feel | Sand underfoot, freshwater, beach entry | A shaped pool with a lagoon-style finish | Pond-like, integrated with planting |
| Best for | Homeowners who want a real sand-bottom, freshwater beach experience | Homeowners who want a shaped pool with a beach-like look but conventional pool upkeep | Homeowners drawn to a chemical-free pond and willing to manage a planted filter zone |
Why the full-sand approach is different
From where we stand as the builder, the full-sand approach is not a finish choice bolted onto a standard pool. It is a different build from the ground up. Your feet are on sand, not a pool shell, the entry is a real beach gradient rather than a step down, and there is no chemical smell because there are no chemicals to smell. Clarity is engineered, not dosed and not grown: freshwater held clear by UV disinfection running in a closed-loop system with zero water waste.
That distinction is why we build it this way across every project, not just the ones where a client asks for a beach entry. Natural full-sand freshwater lagoons are what we build, and that approach carries through every project, from our international work to the lagoons we build here.
None of this makes a full-sand lagoon better for every backyard. It makes it a genuinely different category, one where the basin, the water, and the entry are all part of the same engineered system rather than a pebble ledge dressed up to look like one.
