12 x 5 m Roman pool
pool plan
An estate-class pool: resort presence at home, with room for swimming, play and lounging at the same time. At this size the supporting decisions matter as much as the basin — plan generous decks, a solid heat source and an automatic cover from day one, because every square metre of water is heated, treated and covered.
The Roman pool pairs a rectangular body with semicircular ends, a silhouette borrowed from classical baths. You keep an honest swim lane down the middle while the ends soften the geometry and make natural places for steps — a Roman staircase flowing out of the curved end is the signature move.
Open in the 3D designerFree · no signup · runs in your browser
12 × 5 m — shown to scale
The numbers, computed
- Water surface
- 588 sq ft
- Water volume
- 20,990 gal (87.6 tons)
- Perimeter
- 97′ 5″
- Depth
- 3′ 11″–6′ 7″
- Excavation approx.
- 172 cu yd
- Fill time (garden tap)
- 2 days
- Skimmers needed
- 3×
- Heat pump size
- 96,000 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 | €42,000–€72,000 | Over a block or concrete shell; the least expensive route to any shape. |
| Tiled concrete | €64,000–€107,000 | A poured shell finished in tile; built to any shape, the most durable finish. |
| One-piece fiberglass | Not made at this size | 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 12 × 5 m pool hold?
- About 20,990 gal (87.6 tons of water) at 3′ 11″–6′ 7″ depth — computed from the actual pool outline, not a rule of thumb.
- How long does it take to fill?
- Roughly 2 days 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 588 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 12 × 5 m Roman pool cost to build?
- Roughly €42,000 to €107,000 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
11 × 5 m · Roman
Estate pool18,952 gal · 534 sq ft
12 × 5 m · Rectangular
Estate pool23,226 gal · 646 sq ft
15 × 4 m · Rectangular
Lap pool19,337 gal · 646 sq ft
12 × 5 m · Rounded rectangle
Estate pool22,459 gal · 635 sq ft
12 × 5 m · Oval
Estate pool18,543 gal · 506 sq ft
12 × 5 m · Grecian
Estate pool21,746 gal · 615 sq ft
Go on — put a pool in your garden.
Open the designer and see it in 3D tonight. Free, no signup.
Start designing — it's freeFree · no signup · runs in your browser