Jul 19, 2018 The average cost of composite decking is $35 per square foot. Advanced DIYers can install decks on their own, but more often not, most . be installed on the tops of deck posts or even underneath the rails of the deck for a
Cost to build a deck is $20-40/sq.ft, depending on material. This Deck Cost Estimator will help you estimate prices for different types of decks, based on your specifications - size, type of railing, material (wood, AZEK, Installed Cost / sq. ft.