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A 16x24 deck covers 384 square feet and costs about $6,758 – $10,560 installed in pressure-treated pine, up to $14,746 – $23,040 in composite. It takes about 76 decking boards at 20 ft, 19 joists, 4 footings and 56 linear feet of railing.
| Material | Installed cost |
|---|---|
| Pressure-Treated Pine | $6,758 – $10,560 |
| Cedar | $9,830 – $15,360 |
| Redwood | $11,674 – $18,240 |
| Composite (Trex/TimberTech) | $14,746 – $23,040 |
| PVC / Cellular | $17,818 – $27,840 |
| Ipe / Tropical Hardwood | $19,968 – $31,200 |
A 16x24 deck is 384 square feet. In pressure-treated pine, expect roughly $6,758 – $10,560 installed. Cedar runs about $9,830 – $15,360 and composite about $14,746 – $23,040. 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 16 ft direction, you need 35 rows — that is 840 linear feet of decking, or about 76 boards at 20 ft with a waste allowance. At 24 ft there is no stock length that crosses in one piece, so each row takes 2 boards with 1 butt joint that needs blocking beneath it.
About 4, one under each post, with posts at no more than 8 feet along the beam. That is roughly 0.49 cubic yards of concrete for 12 inch tubes poured 42 inches below grade — around 23 eighty-pound bags. Your own frost depth sets the real number and is not negotiable.