Installed cost
$6,000 – $12,800$6,000$6,000–$12,800$12,800
16 × 12 ft pressure-treated wood deck with 40 ft of railing · national average prices
Deck boards29 boards29 boards29 boards16 ft, 26 rows, incl. 10% waste
Joists13 joists13 joists13 joists12 ft long at 16 in on center
Deck screws672 screws672 screws672 screws2 box(es) of 350
Cost per sq ft$31 – $67$31.25$31.25–$66.67$66.67Including railing
Key takeaways- Composite costs about 1.5× pressure-treated wood for this deck (same railing).
- Building it yourself would cut this to $2,520 – $5,440 in materials.
Installed estimate
- Pressure-treated wood deck, 192 sq ft installed$25–$50 per sq ft$4,800 – $9,600
- Railing, 40 lin ft installedEditorial estimate: $30–$80 per lin ft$1,200 – $3,200
- Total$6,000 – $12,800
Installed cost by decking material
Detailed numbers
Material comparison for 192 sq ft (deck surface only)| Material | Hire a pro | DIY materials |
|---|
| Pressure-treated wood | $4,800 – $9,600 | $1,920 – $3,840 |
|---|
| Cedar | $5,760 – $9,600 | $1,920 – $3,840 |
|---|
| Composite | $7,680 – $15,360 | $3,072 – $6,144 |
|---|
Railing is not included in this table.
Framing and decking takeoff| Item | Quantity | Notes |
|---|
| Deck boards | 29 boards | 26 rows × 1 per row + 10% waste, 16 ft long |
|---|
| Joists | 13 joists | 12 ft long at 16 in on center |
|---|
| Deck screws | 672 screws | 2 box(es) of 350 |
|---|
| Railing | 40 ft | 3 sides |
|---|
Show the math
- Area = 16 ft × 12 ft = 192 sq ft
- Board rows = ⌈144 in ÷ (5.5 in + 0.1875 in gap)⌉ = 26
- Boards per row = ⌈16 ft ÷ 16 ft⌉ = 1
- Boards = 26 × 1 = 26, + 10% waste → 29
- Joists = ⌈192 in ÷ 16 in⌉ + 1 = 13
- Screws ≈ 192 sq ft × 350 ÷ 100 = 672 → 2 box(es)
- Pressure-treated wood deck, 192 sq ft installed: $4,800 – $9,600
- Railing, 40 lin ft installed: $1,200 – $3,200
- Total = $6,000 – $12,800