Trex Deck Cost in Illinois
A Trex deck in Illinois costs $38-$95/sqft installed with the state's 1.00× labor multiplier (Midwest). Trex is the largest composite decking brand in North America with ~35% market share. 3 main lines compete on price-vs-performance: Enhance (entry), Transcend (premium), Signature (luxury heat-mitigation cap). Illinois labor 1.00× national (Midwest baseline). Chicago's permit process is more involved than downstate.
Trex cost by deck size in Illinois
Mid-tier Trex (Trex Enhance Basics) at Illinois's 1.00× labor multiplier — ~$35/sqft installed.
Cost ranges include materials + labor + standard railing. Excludes permit ($175 baseline + 1.2% of project value), demolition (if replacing), and footings for 42″ frost depth.
Trex product lines in Illinois
Trex installed cost ranges from $38/sqft (Enhance Naturals on PT framing) to $95/sqft (Signature on engineered framing + premium railing). National median is $52/sqft for a mid-tier Transcend deck — multiply by your state labor multiplier for local pricing.
Illinois-specific notes
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Open the Trex Deck Calculator with IL pre-selected to dial in your exact size, board line, and railing choices.
FAQ — Trex in Illinois
How much does a Trex deck cost in Illinois?▾
In Illinois, Trex decking costs $38-$95/sqft installed (national $38-$95/sqft × Illinois's 1.00× labor multiplier). A typical 16×20 (320 sqft) Trex deck lands around $21,440. Mid-tier Trex Enhance Basics runs about $11,200 for the same scope.
Which Trex line is best for Illinois's climate?▾
Illinois's freeze-thaw cycles favor PVC over composite where budget allows. Trex Transcend works well in snow regions when properly fastened with the right expansion gap.
What's the permit fee for a Trex deck in Illinois?▾
Illinois permit fees typically run $131-$324 depending on jurisdiction and project value — most calculators use max(regional baseline $175, 1.2% of project value). Chicago metro permits $250-400. Frost depth 42″ across most of state.
How deep do footings need to be for a Trex deck in Illinois?▾
Illinois's frost depth is approximately 42″. Trex doesn't change the footing requirement — that's IRC R403.1.4-driven by frost line. Use Sonotube 10-12″ depending on tributary area. Verify with your local building department since AHJs sometimes require deeper depths than the state-published value.
Is Trex worth the money in Illinois?▾
Trex vs PT pine over 25 years in Illinois: PT pine = ~$30/sqft installed + ~$3/sqft/yr maintenance (stain/seal annually) = $93/sqft total. Trex mid-tier = $35/sqft installed + $0 maintenance = $35/sqft total. Trex typically wins the 25-yr TCO comparison by 20-40%, plus better resale value.