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
Get a precise Trex quote for Illinois
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.
Other states for Trex deck cost
Get matched
Want 2–3 free quotes for this exact deck?
We'll send your plan to vetted local builders. Free, no obligation.