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A 12x14 deck covers 168 square feet and costs about $2,957 – $4,620 installed in pressure-treated pine, up to $6,451 – $10,080 in composite. It takes about 29 decking boards at 16 ft, 11 joists, 3 footings and 38 linear feet of railing.
| Material | Installed cost |
|---|---|
| Pressure-Treated Pine | $2,957 – $4,620 |
| Cedar | $4,301 – $6,720 |
| Redwood | $5,107 – $7,980 |
| Composite (Trex/TimberTech) | $6,451 – $10,080 |
| PVC / Cellular | $7,795 – $12,180 |
| Ipe / Tropical Hardwood | $8,736 – $13,650 |
A 12x14 deck is 168 square feet. In pressure-treated pine, expect roughly $2,957 – $4,620 installed. Cedar runs about $4,301 – $6,720 and composite about $6,451 – $10,080. Building it yourself typically removes 40 to 55 percent of those figures, because labour is around half of a finished deck price.
Laying boards across the 12 ft direction, you need 26 rows — that is 364 linear feet of decking, or about 29 boards at 16 ft with a waste allowance. A 16 ft board crosses the deck in one piece, so there are no butt joints.
About 3, one under each post, with posts at no more than 8 feet along the beam. That is roughly 0.37 cubic yards of concrete for 12 inch tubes poured 42 inches below grade — around 17 eighty-pound bags. Your own frost depth sets the real number and is not negotiable.