price per square foot to build composite decking

Learn more about what factors into the final deck price and it will cost to build a high-performance composite a deck run about $12.12 per square foot.

The cost to Install Synthetic Decking starts at $14.40 $17.55 per square foot, Explore the full range of composite decking new installation labor options and

Materials cost $10-$30 or more a square foot, depending on the brand and style, or $3,200-$9,600 for 16'x20'. CostHelper readers report spending $8,000-$11,500 on DIY materials for a composite deck, roughly $13.91-$28.57 a square foot, with an average of $19.34.