7 x 4 m kidney pool
pool plan
A full family pool: a shallow end where kids stand and games happen, a proper deep end for diving-free swimming, and enough length that two people can swim without negotiating. This is the most-built size class in private gardens for a reason.
The kidney is the archetypal free-form pool: one flowing bean-shaped curve with a waist that invites planting, a boulder or a slide. It blends into naturalistic landscapes better than any straight-walled shape and makes small gardens feel bigger because the eye never finds a hard boundary.
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7 × 4 m — shown to scale
The numbers, computed
- Water surface
- 171 sq ft
- Water volume
- 5,826 gal (24.3 tons)
- Perimeter
- 55′ 1″
- Depth
- 3′ 11″–5′ 11″
- Excavation approx.
- 48 cu yd
- Fill time (garden tap)
- 15 hours
- Skimmers needed
- 1×
- Heat pump size
- 27,000 BTU/h
Figures are computed from the sampled pool outline and the plan's depths — the same geometry the 3D designer uses. Excavation includes shell and working allowance; your site conditions may differ.
What it costs to build
A rough installed-cost range per construction type, at this size — the pool itself, with basic coping. Not a quote.
| Construction | Installed cost | Note |
|---|---|---|
| Liner or membrane | €21,000–€35,000 | Over a block or concrete shell; the least expensive route to any shape. |
| Tiled concrete | €32,000–€51,000 | A poured shell finished in tile; built to any shape, the most durable finish. |
| One-piece fiberglass | €18,000–€30,000 | Fastest to install; limited to sizes and shapes a mould exists for. |
Rough 2026 estimates for the pool installed with basic coping — excavation, shell and basic equipment. Excludes deck, fencing, landscaping, heating and permits, all of which vary by site and by builder; get real bids before budgeting from these figures.
Questions about this plan
- How much water does the 7 × 4 m pool hold?
- About 5,826 gal (24.3 tons of water) at 3′ 11″–5′ 11″ depth — computed from the actual pool outline, not a rule of thumb.
- How long does it take to fill?
- Roughly 15 hours from a standard garden tap (~6.6 GPM). A water delivery service fills it in a few hours.
- Is this size right for my garden?
- The water surface is 171 sq ft; plan roughly 1.5–2× that footprint including the surrounding deck. Open the plan in the designer and set your own deck margins to see the full footprint.
- Can I change the depth or edge type?
- Yes — open the plan in the designer and adjust depths, edge system (skimmer, deck-level overflow or raised), finishes and accessories freely.
- How much does the 7 × 4 m kidney pool cost to build?
- Roughly €18,000 to €51,000 installed at this size, depending on construction type — before deck, fence, landscaping, heating or permits. See the cost table above for the range per type.
Similar pool plans
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7 × 4 m · Oval
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8 × 3.5 m · Roman
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7 × 4 m · Grecian
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7 × 4 m · Figure 8
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Go on — put a pool in your garden.
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