How Much Does a Deck Cost? (2026)
A deck costs about $15 to $45 per square foot installed. Pressure-treated wood runs $15–$25, cedar $20–$35, and composite $25–$45. A typical 300 sq ft deck costs roughly $4,500 to $13,500, with framing, railings, and height all affecting the total.
A deck is one of the best-value ways to add usable outdoor living space, but the cost swings widely by material and size. Pressure-treated wood is cheapest up front; composite costs more but barely needs maintenance.
This guide breaks down deck costs in 2026 by size and material, and shows how to estimate the boards and framing you'll need.
Key takeaways
- Decks cost about $15–$45 per square foot installed.
- Pressure-treated wood is cheapest; composite costs most but lasts longest.
- A 300 sq ft deck runs roughly $4,500–$13,500.
- Framing, railings, stairs, and height add to the base cost.
- Most decks need a permit and proper footings.
Skip the math
Get instant numbers with the Deck Calculator.
Deck cost by material
| Decking | Cost per ft² (installed) | Lifespan |
|---|---|---|
| Pressure-treated wood | $15 – $25 | 10–15 yrs |
| Cedar / redwood | $20 – $35 | 15–20 yrs |
| Composite | $25 – $45 | 25–30 yrs |
| PVC / capped | $30 – $60 | 30+ yrs |
Deck cost by size
| Deck size | Area | Installed cost |
|---|---|---|
| 10 × 12 ft | 120 ft² | $1,800 – $5,400 |
| 16 × 12 ft | 192 ft² | $2,900 – $8,600 |
| 20 × 15 ft | 300 ft² | $4,500 – $13,500 |
What drives the price
- Material — composite and PVC cost far more than pressure-treated wood
- Height — raised decks need more framing, posts, and railings
- Railings and stairs — a significant add-on beyond the deck surface
- Footings and permits — required in most areas
- Labor rates — the biggest regional variable
Estimate your deck materials
Our deck calculator turns your deck dimensions and board size into the number of boards, joists, screws, and an installed-cost range.