A freestanding 10' x10' deck needs 4 posts, supporting two pairs of 2-ply non-incised 2×8 beam, upgrading the beam to 3-ply using incised wood.
What is the cheapest way to build a deck?
Choose wood, but carefully: Untreated wood decks are generally the cheapest to install, but don't forget long-term costs. Wood decks require yearly maintenance and deteriorate quickly if they don't get it.
How much does it cost to build a 8x8 deck?
Dimensions Total Square Feet Average Price Range
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8x8 64 $2,560 - $3,840
8x10 80 $3,200 - $4,800
10x10 100 $4,000 - $6,000
10x12 120 $4,800 - $7,200
Average Deck Cost Per Square Foot The average cost to build a deck is $25 per square foot with most homeowners spending between $4,380 to $10,080 total. An entry level deck with basic materials costs $15 per square foot, while a deck built with premium materials costs $35 per square foot.