24×20 Deck Cost in Wisconsin
A 24×20 (480 sqft) deck in Wisconsin costs $24,000-$38,400 in mid-tier composite with the state's 1.00× labor multiplier (Midwest). A 20×24 deck (480 sqft) is luxury-class — full outdoor kitchen + dining + lounge + grill island. Wisconsin labor 1.00× national. Frost depth 48″.
5 finish tiers — 24×20 in Wisconsin
National $/sqft × Wisconsin's 1.00× labor multiplier × 480 sqft = total installed cost. Materials + labor + standard railing included.
Excludes permit ($131-$324 typical in Wisconsin), demolition (if replacing), and exceptional framing for 48″ frost depth. WI permits $150-260.
24×20 framing notes for Wisconsin
Wisconsin considerations
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FAQ — 24×20 deck in Wisconsin
How much does a 24×20 deck cost in Wisconsin?▾
In Wisconsin, a 24×20 (480 sqft) deck costs $12,000-$19,200 in pressure-treated, $24,000-$38,400 in mid-range composite (Trex Transcend / Fiberon Sanctuary), and $36,000-$52,800 in luxury composite/PVC (TimberTech AZEK / Trex Signature). Numbers reflect Wisconsin's 1.00× labor multiplier on 2026-Q1 retail.
What's the cheapest way to build a 24×20 deck in Wisconsin?▾
Cheapest = ground-level pressure-treated pine with no railings (where exempt under 30″ height) — ~$9,600-$14,400 in Wisconsin. Add stairs + railings + above-grade framing and the build goes to ~$13,440-$19,200. DIY saves 30-50% on labor but requires permit + inspection coordination yourself.
How long does it take to build a 24×20 deck in Wisconsin?▾
Permit timeline in Wisconsin: 2-6 weeks depending on jurisdiction. Construction time for a 24×20: pro crew = 8-14 days for framing + boards + railings + stairs. DIY = 5-8 weekends for experienced DIYer. Allow extra time for permit approval + inspections.
What framing do I need for a 24×20 deck in Wisconsin?▾
IRC R507-compliant framing for a 24×20 deck typically uses 2×8 joists at 16″ OC for spans up to 12 ft, 2×10 joists for spans 12-16 ft. Wisconsin's frost depth is 48″ — footings must extend below that per IRC R403.1.4. Deep frost requires more concrete per footing — budget extra for sonotubes + concrete. Verify with your local building department.
Is composite worth it for a 24×20 deck in Wisconsin?▾
Over 25 years in Wisconsin: PT pine = ~$14,400 install + ~$30,000 maintenance (stain every 2-3 yr) = $44,400 total. Mid composite = ~$27,840 install + $0 maintenance = $27,840 total. Composite wins by 59-81% over 25-yr lifecycle PLUS better resale value in Wisconsin's market.