The average cost to build a deck is around $8,000, or $30-60 per sq. fit. Deck costs vary depending on multiple factors, including the size, style and materials used. You can reduce the costs by installing the deck yourself or choosing less-expensive decking materials. May 26, 2023 How Much Does It Cost To Build A Deck? | Bankrate bankrate.com https://www.bankrate.com � homeownership � how-muc... bankrate.com https://www.bankrate.com � homeownership � how-muc... The average cost to build a deck is around $8,000, or $30-60 per sq. fit. Deck costs vary depending on multiple factors, including the size, style and materials used. You can reduce the costs by installing the deck yourself or choosing less-expensive decking materials. May 26, 2023