A new deck costs $15–$60 per square footinstalled in 2026. A typical 12×16 deck runs about $2,900–$11,500depending on material—pressure-treated is cheapest, composite is the priciest but lasts longest.
The single biggest factor in what a deck costs is the decking material. Beyond that, the size of the deck, the railing you choose, and add-ons like stairs, a pergola, or built-in lighting move the number up or down. Below is what to expect in 2026, plus a way to get your own itemized number in about a minute.
Deck cost by material
Pressure-treated lumber is the most affordable decking material; composite costs the most upfront but needs almost no maintenance over its life.
| Material | Installed range | Lifespan |
|---|---|---|
| Pressure-treated | $15–$35 / sq ft | 10–15 yrs |
| Cedar | $20–$45 / sq ft | 15–20 yrs |
| Composite | $30–$60 / sq ft | 25–30 yrs |
Deck cost by size
Multiply your square footage by the per-foot range above for a rough number, or use these common sizes as a starting point.
| Size | Treated | Composite |
|---|---|---|
| 10 × 10 (100 sf) | $1,500–$3,500 | $3,000–$6,000 |
| 12 × 16 (192 sf) | $2,900–$6,700 | $5,800–$11,500 |
| 16 × 20 (320 sf) | $4,800–$11,200 | $9,600–$19,200 |
What drives the price
- Material— the boards are the biggest line item.
- Railing & infill— cable and glass cost more than picket.
- Stairs & landings— each run adds framing and labor.
- Height & footings— taller decks need more structure.
- Add-ons— pergola, lighting, skirting, and built-in seating.
Labor rates, permit fees, and material availability differ across the country, so your local number may land above or below these national ranges.