Size Dimensions Square Feet Average Cost 10x10 100 $4,000�$6,000 10x12 120 $3,600�$7,200 12x12 144 $5,760�$8,640 12x16 192 $5,400�$10,800 5 more rows � Feb 2, 2024 Cost to Build a Deck in 2024 | Angi angi.com https://www.angi.com � how-much-does-it-cost-build-deck angi.com https://www.angi.com � how-much-does-it-cost-build-deck Size Dimensions Square Feet Average Cost 10x10 100 $4,000�$6,000 10x12 120 $3,600�$7,200 12x12 144 $5,760�$8,640 12x16 192 $5,400�$10,800 5 more rows � Feb 2, 2024