Choosing a pool shape: a practical guide
Shape is where taste meets consequences: it changes the swim, the build cost, the cover and how the pool sits in your garden.
6 min read
Straight shapes swim better
If swimming matters, straight and long wins: the rectangle and its softened variants (rounded, Roman, Grecian) put the most uninterrupted metres of water in a given footprint. Free-form shapes trade swim lane for looks — a kidney can lose a third of its length to curves.
Curved shapes sit better
In a planted, informal garden a hard rectangle can look like a shipping container of water. Ovals, kidneys and figure-8s blend with planting, disguise their true size and forgive irregular plots. They also circulate beautifully — no corners for debris to camp in.
Zoned shapes solve family arguments
L-shapes and lazy Ls physically separate the swim lane from the play zone; the figure-8 does it with a waist. If your household includes both a lap swimmer and small children, a zoned shape resolves the conflict better than any pool rule ever will.
Shape has a price tag
Every curve costs money at forming, coping and cover time. A rectangle takes standard formwork and an off-the-shelf automatic cover; a kidney needs curved shuttering, cut-to-shape coping and a custom cover. As a rule: straight walls are budget, gentle fillets are mild premium, free-form is a genuine premium.
Frequently asked questions
- What's the most popular pool shape?
- The rectangle and the rounded rectangle, by a wide margin — they maximize swimmable water and minimize build cost.
- Which shape is cheapest to build?
- A rectangle: straight walls, standard formwork, straight coping and stock covers.
- Which shape suits a small garden?
- Round and compact rounded rectangles. The circle fits corners and courtyards; curves make a small pool feel intentional rather than shrunken.