Curved deck · all 20 popular sizes
Curved Deck Cost by Size
A curved deck uses a steam-bent or laminated radial rim joist to create an organic, gallery-style edge — typically on the back side facing the yard.
1.35× labor vs rectangular28% waste factor
Best for
High-end builds where the deck is a visual centerpiece, landscape-architecture-coordinated installs, pool surrounds following a curved pool wall.
Watch-outs
Specialty trade — only ~15% of decking contractors quote curved work. Get 3+ bids, expect them to vary 40-60%. Some composite brands void warranty for curved installs.
Pick your curved deck size
10×8
80 sqftMid composite: $5,400-$8,640
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10×10
100 sqftMid composite: $6,750-$10,800
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12×10
120 sqftMid composite: $8,100-$12,960
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12×12
144 sqftMid composite: $9,720-$15,552
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14×12
168 sqftMid composite: $11,340-$18,144
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16×12
192 sqftMid composite: $12,960-$20,736
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16×14
224 sqftMid composite: $15,120-$24,192
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20×12
240 sqftMid composite: $16,200-$25,920
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16×16
256 sqftMid composite: $17,280-$27,648
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20×14
280 sqftMid composite: $18,900-$30,240
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24×12
288 sqftMid composite: $19,440-$31,104
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20×16
320 sqftMid composite: $21,600-$34,560
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20×18
360 sqftMid composite: $24,300-$38,880
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24×16
384 sqftMid composite: $25,920-$41,472
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20×20
400 sqftMid composite: $27,000-$43,200
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24×20
480 sqftMid composite: $32,400-$51,840
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24×24
576 sqftMid composite: $38,880-$62,208
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30×20
600 sqftMid composite: $40,500-$64,800
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30×24
720 sqftMid composite: $48,600-$77,760
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30×30
900 sqftMid composite: $60,750-$97,200
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Open the calculator with curved pre-loaded
Use the full cost calculator to dial in your exact material, railing, stair, and footing specs. Apply the 1.35× multiplier shown above to the rectangular baseline.