DeckMath
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Multi-level deck · all 20 popular sizes

Multi-level Deck Cost by Size

A multi-level deck stacks two or more platforms at different heights — creating natural seating tiers, hot-tub recessed wells, or transition zones to a yard at grade.

1.25× labor vs rectangular12% waste factor
Best for

Sloped yards (use grade change instead of fighting it), hot-tub installs (recessed well), large entertaining decks (zone separation).

Watch-outs

Permit complexity scales fast — most jurisdictions require an engineer review past 2 levels. Budget 25-40% more total than equivalent single-level.

Pick your multi-level deck size

10×8
80 sqft
Mid composite: $5,000-$8,000
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10×10
100 sqft
Mid composite: $6,250-$10,000
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12×10
120 sqft
Mid composite: $7,500-$12,000
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12×12
144 sqft
Mid composite: $9,000-$14,400
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14×12
168 sqft
Mid composite: $10,500-$16,800
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16×12
192 sqft
Mid composite: $12,000-$19,200
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16×14
224 sqft
Mid composite: $14,000-$22,400
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20×12
240 sqft
Mid composite: $15,000-$24,000
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16×16
256 sqft
Mid composite: $16,000-$25,600
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20×14
280 sqft
Mid composite: $17,500-$28,000
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24×12
288 sqft
Mid composite: $18,000-$28,800
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20×16
320 sqft
Mid composite: $20,000-$32,000
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20×18
360 sqft
Mid composite: $22,500-$36,000
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24×16
384 sqft
Mid composite: $24,000-$38,400
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20×20
400 sqft
Mid composite: $25,000-$40,000
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24×20
480 sqft
Mid composite: $30,000-$48,000
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24×24
576 sqft
Mid composite: $36,000-$57,600
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30×20
600 sqft
Mid composite: $37,500-$60,000
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30×24
720 sqft
Mid composite: $45,000-$72,000
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30×30
900 sqft
Mid composite: $56,250-$90,000
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Open the calculator with multi-level pre-loaded

Use the full cost calculator to dial in your exact material, railing, stair, and footing specs. Apply the 1.25× multiplier shown above to the rectangular baseline.

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