Trex Deck Cost in Washington
A Trex deck in Washington costs $49-$122/sqft installed with the state's 1.28× labor multiplier (West). 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). Washington labor 1.28× national. Pacific Northwest rain + moss — composite recommended over PT.
Trex cost by deck size in Washington
Mid-tier Trex (Trex Enhance Basics) at Washington's 1.28× labor multiplier — ~$45/sqft installed.
Cost ranges include materials + labor + standard railing. Excludes permit ($290 baseline + 1.2% of project value), demolition (if replacing), and footings for 18″ frost depth.
Trex product lines in Washington
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.
Washington-specific notes
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FAQ — Trex in Washington
How much does a Trex deck cost in Washington?▾
In Washington, Trex decking costs $49-$122/sqft installed (national $38-$95/sqft × Washington's 1.28× labor multiplier). A typical 16×20 (320 sqft) Trex deck lands around $27,200. Mid-tier Trex Enhance Basics runs about $14,400 for the same scope.
Which Trex line is best for Washington's climate?▾
Washington's Pacific Northwest rain favors capped composite or PVC over PT pine — better moisture resistance. Trex Transcend performs well in this environment with proper drainage gap (1/8″-3/16″ side-to-side).
What's the permit fee for a Trex deck in Washington?▾
Washington permit fees typically run $218-$537 depending on jurisdiction and project value — most calculators use max(regional baseline $290, 1.2% of project value). WA permits $250-400. Seattle moss + rain notes.
How deep do footings need to be for a Trex deck in Washington?▾
Washington's frost depth is approximately 18″. Trex doesn't change the footing requirement — that's IRC R403.1.4-driven by frost line. Use Sonotube 10″ for typical loads. Verify with your local building department since AHJs sometimes require deeper depths than the state-published value.
Is Trex worth the money in Washington?▾
Trex vs PT pine over 25 years in Washington: PT pine = ~$38/sqft installed + ~$3/sqft/yr maintenance (stain/seal annually) = $118/sqft total. Trex mid-tier = $45/sqft installed + $0 maintenance = $45/sqft total. Trex typically wins the 25-yr TCO comparison by 20-40%, plus better resale value.
Other states for Trex deck cost
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