Deck Building Cost Calculator (2026)
A new deck adds outdoor living space. Pressure-treated wood is the budget option; composite (Trex-style) costs more up front but needs almost no maintenance.
Deck Building Cost Calculator
Adjust the details for an installed-cost range tailored to you.
Length × width of the deck surface. A 16×20 deck is 320 sq ft.
Ballpark estimate for planning — not a quote.
Get your exact price from local deck pros
This is a ballpark — compare up to 3 free, no-obligation quotes from vetted contractors.
Deck Building cost per sq ft
Installed cost per sq ft, and a typical 320 sq ft project (national average).
| Material | Per sq ft | Typical project |
|---|---|---|
| Pressure-treated wood | $15–$25 | $4,800 – $8,000 |
| Cedar / redwood | $25–$40 | $8,000 – $12,800 |
| Composite (Trex-style) | $30–$60 | $9,600 – $19,200 |
What affects deck building cost
- Decking material and railing style
- Height off the ground and stairs
- Footings, framing and permits
- Built-ins (benches, pergola, lighting)
- Local labor rates
Frequently asked questions
How much does deck building cost per sq ft?
Installed deck runs roughly $15–$60 per sq ft in 2026, depending on material — pressure-treated wood $15–$25, cedar / redwood $25–$40, composite (trex-style) $30–$60. Labor and your region shift the number; use the calculator above for your exact size and state.
How much does it cost to build a deck in 2026?
A typical 320 sq ft deck runs about $5,000–$8,000 in pressure-treated wood, or $10,000–$19,000 in composite, installed. Size, height, railings and material drive the price — use the calculator for a localized estimate.
Is composite decking worth it?
Composite costs roughly 1.5–2× wood up front but eliminates staining/sealing and lasts 25–30+ years, so total cost of ownership is often lower. It's the popular choice for homeowners who don't want annual maintenance.
Deck Building cost by state
Localized deck building prices for your state.
Compare materials
Weighing two options? See a side-by-side cost, pros and cons breakdown.