10 x 20 ft rounded rectangle pool
pool plan
A compact family size: big enough for proper swimming strokes and games, small enough that heating, covering and chemistry stay cheap. In most gardens this class hits the sweet spot between water you use daily and garden you keep.
A rounded rectangle keeps almost all of the rectangle's swimmable water but rounds the corners into generous fillets. The result reads softer in a garden, is gentler on swimmers, and the corners no longer trap debris the way sharp ones do. It's the shape we default to in the designer.
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10 × 20 ft — shown to scale
The numbers, computed
- Water surface
- 196 sq ft
- Water volume
- 6,042 gal (25.2 tons)
- Perimeter
- 56′ 4″
- Depth
- 3′ 11″–5′ 3″
- Excavation approx.
- 52 cu yd
- Fill time (garden tap)
- 15 hours
- Skimmers needed
- 1×
- Heat pump size
- 31,000 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 |
|---|---|---|
| Vinyl liner | $30,000–$45,000 | Fastest and least expensive; the liner is replaced every 8–12 years. |
| Fiberglass | $39,000–$56,000 | One-piece shell, quick install; limited to sizes and shapes a mould exists for. |
| Concrete (gunite) | $49,000–$75,000 | Built to any shape or size; the slowest build and the most upkeep. |
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 10 × 20 ft pool hold?
- About 6,042 gal (25.2 tons of water) at 3′ 11″–5′ 3″ 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 196 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 10 × 20 ft rounded rectangle pool cost to build?
- Roughly $30,000 to $75,000 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
10 × 20 ft · Rectangular
Compact pool6,230 gal · 200 sq ft
12 × 24 ft · Rounded rectangle
Family pool9,344 gal · 282 sq ft
Ø 15 ft · Round
Compact pool5,298 gal · 176 sq ft
Ø 12 ft · Round
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8 × 16 ft · Rectangular
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12 × 24 ft · Rectangular
Family pool9,675 gal · 288 sq ft
Go on — put a pool in your garden.
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