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This deck cost calculator estimates what it costs to build a new deck based on its size and decking material. It shows a typical installed cost range per square foot, the cost at the national average, and separate ranges for decking boards and labor.
How to Use the Deck Cost Calculator
- Enter the deck length and width.
- Choose pressure-treated wood or composite decking.
- Optionally enter a quoted price per square foot.
Typical Deck Costs
| Item | Typical US price per sq ft |
|---|---|
| Deck, fully installed | $30–$60 (national average about $35) |
| Pressure-treated decking boards only | $3–$6 |
| Composite decking boards only | $5–$12 |
| Labor | $15–$35 |
Installed prices include framing, footings, decking, fasteners and labor. Composite decking, raised decks, stairs, built-in benches and railings push the cost toward the high end.
Example
A 16 × 12 ft deck is 192 sq ft. At $30–$60 per sq ft, the installed cost is about $5,800–$11,500, or about $6,700 at the $35 average. Pressure-treated decking boards alone would cost about $580–$1,150.
Cost by Deck Size
| Deck size | Area | Installed ($30–$60/sq ft) |
|---|---|---|
| 10 × 10 ft | 100 sq ft | $3,000 – $6,000 |
| 12 × 12 ft | 144 sq ft | $4,320 – $8,640 |
| 12 × 16 ft | 192 sq ft | $5,760 – $11,520 |
| 16 × 20 ft | 320 sq ft | $9,600 – $19,200 |
| 20 × 20 ft | 400 sq ft | $12,000 – $24,000 |
Ways to Save
- Build close to the ground to avoid stairs and tall posts.
- Choose simple rectangular shapes.
- Use pressure-treated framing even under composite decking.
- Get several quotes and build outside peak season.
- DIY? Our deck calculator counts boards, joists and screws.
Sources for Cost Data
Prices are national ranges and change over time. Labor rates, materials and permit fees vary widely by region, so use these figures for budgeting and always compare several local quotes.
Frequently Asked Questions
How much does it cost to build a 12×12 deck?
A 144 sq ft deck at $30–$60 per square foot costs about $4,300–$8,600 installed.
Is composite decking more expensive than wood?
Yes. Composite boards cost about $5–$12 per sq ft compared with $3–$6 for pressure-treated wood, but they need less maintenance.
How much is labor to build a deck?
Labor typically runs about $15–$35 per square foot, depending on region and complexity.
Do I need a permit to build a deck?
Most attached or raised decks need a permit. Check with your local building department.
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