How Much Does It Cost to Build a Deck? (2024)

Written by Sarah NoelApril 24, 2024Edited by Tamatha HazenFact-checked by Kristen CramerAverage costCost by materialCost by typeCost estimatorDIY cost FAQsGetting estimatesCost to build a deckThe cost to build a new deck is $25 to $50 per square foot total, depending on the material and type. Deck replacement costs $30 to $55 per square foot installed. Building a 12'x12' deck costs $3,600 to $7,200 on average. A 20'x20' deck installation costs $10,000 to $20,000.Deck material prices are $14 to $28 per square foot for pressure-treated pine.The labor cost to build a new deck is $11 to $22 per square foot.Cost to build a deck by sizeDeck size (feet)Square feetAverage cost installed*8'x10'80$2,000 – $4,00010'x10'100$2,500 – $5,00010'x12'120$3,000 – $6,00012'x12'144$3,600 – $7,20012'x14'168$4,200 – $8,40012'x16'192$4,800 – $9,60012'x18'216$5,400 – $10,80012'x20'240$6,000 – $12,00014'x20'280$7,000 – $14,00016'x16'256$6,400 – $12,80020'x20'400$10,000 – $20,00020'x24'480$12,000 – $24,00024'x24...