As an Amazon Associate I earn from qualifying purchases.
A 8x16 deck covers 128 square feet and costs about $2,253 – $3,520 installed in pressure-treated pine, up to $4,915 – $7,680 in composite. It takes about 20 decking boards at 16 ft, 13 joists, 3 footings and 32 linear feet of railing.
| Material | Installed cost |
|---|---|
| Pressure-Treated Pine | $2,253 – $3,520 |
| Cedar | $3,277 – $5,120 |
| Redwood | $3,891 – $6,080 |
| Composite (Trex/TimberTech) | $4,915 – $7,680 |
| PVC / Cellular | $5,939 – $9,280 |
| Ipe / Tropical Hardwood | $6,656 – $10,400 |
A 8x16 deck is 128 square feet. In pressure-treated pine, expect roughly $2,253 – $3,520 installed. Cedar runs about $3,277 – $5,120 and composite about $4,915 – $7,680. 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 8 ft direction, you need 18 rows — that is 288 linear feet of decking, or about 20 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.