20×16 Deck Cost in Florida
A 20×16 (320 sqft) deck in Florida costs $14,720-$23,680 in mid-tier composite with the state's 0.92× labor multiplier (South). A 16×20 deck (320 sqft) is the canonical 'mid-large' deck — fits a full sectional, a 6-seat dining table, and a grill island. Florida's salt-air + UV combo is the toughest US deck environment. Marine-grade Trex Pro Platinum dealers stock specific corrosion-rated hardware.
5 finish tiers — 20×16 in Florida
National $/sqft × Florida's 0.92× labor multiplier × 320 sqft = total installed cost. Materials + labor + standard railing included.
Excludes permit ($105-$259 typical in Florida), demolition (if replacing), and exceptional framing for 0″ frost depth. FL hurricane requirements — check local code for uplift connectors. Permit fees $200-400.
20×16 framing notes for Florida
Florida considerations
Get a precise quote for your 20×16 deck in Florida
Open the Deck Cost Calculator with FL pre-selected and dial in your exact size, framing, material, and railing choices.
FAQ — 20×16 deck in Florida
How much does a 20×16 deck cost in Florida?▾
In Florida, a 20×16 (320 sqft) deck costs $7,360-$11,840 in pressure-treated, $14,720-$23,680 in mid-range composite (Trex Transcend / Fiberon Sanctuary), and $22,080-$32,320 in luxury composite/PVC (TimberTech AZEK / Trex Signature). Numbers reflect Florida's 0.92× labor multiplier on 2026-Q1 retail.
What's the cheapest way to build a 20×16 deck in Florida?▾
Cheapest = ground-level pressure-treated pine with no railings (where exempt under 30″ height) — ~$5,888-$8,832 in Florida. Add stairs + railings + above-grade framing and the build goes to ~$8,243-$11,776. DIY saves 30-50% on labor but requires permit + inspection coordination yourself.
How long does it take to build a 20×16 deck in Florida?▾
Permit timeline in Florida: 2-6 weeks depending on jurisdiction. Construction time for a 20×16: pro crew = 5-8 days for framing + boards + railings + stairs. DIY = 3-5 weekends for experienced DIYer. Allow extra time for permit approval + inspections.
What framing do I need for a 20×16 deck in Florida?▾
IRC R507-compliant framing for a 20×16 deck typically uses 2×8 joists at 16″ OC for spans up to 12 ft, 2×10 joists for spans 12-16 ft. Florida's frost depth is 0″ — footings must extend below that per IRC R403.1.4. No frost depth in your region — minimum 12″ footing depth still required for stability. Verify with your local building department.
Is composite worth it for a 20×16 deck in Florida?▾
Over 25 years in Florida: PT pine = ~$8,832 install + ~$18,400 maintenance (stain every 2-3 yr) = $27,232 total. Mid composite = ~$17,075 install + $0 maintenance = $17,075 total. Composite wins by 59-81% over 25-yr lifecycle PLUS better resale value in Florida's market.