Deck Cost Calculator
Estimate what your deck will cost to build in 2026. Adjust the size, material, and features for an instant price range and a full breakdown — no brand bias, no email required.
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How much does it cost to build a deck?
In 2026, a typical deck costs roughly $30 to $60 per square foot installed, with most projects landing between $9,000 and $20,000. Pressure-treated wood is the cheapest decking material ($3–$6/sq ft for the boards), composite runs $5–$14/sq ft, and exotic hardwoods like Ipe reach $10–$20/sq ft. Labor usually adds another $8–$22 per square foot.
Average deck cost by size
| Deck size | Square feet | Typical installed cost |
|---|---|---|
| 10 × 10 | 100 sq ft | $3,000 – $6,000 |
| 12 × 12 | 144 sq ft | $5,800 – $8,600 |
| 14 × 20 | 280 sq ft | $11,200 – $16,800 |
| 20 × 20 | 400 sq ft | $16,000 – $24,000 |
What drives the price
- Material — composite and PVC cost more upfront but need far less maintenance.
- Height — raised and second-story decks need bigger posts, more bracing, and harder access.
- Railing and stairs — both add up fast; railing runs $15–$60 per linear foot installed.
- Labor vs DIY — doing it yourself removes roughly half the cost but adds time and risk.
Frequently asked questions
- Does this include labor?
- Yes by default. Uncheck “Include professional labor” to see a DIY materials-only estimate.
- Is a permit required?
- Most decks attached to a house need a permit ($230–$500 here). Check your local building department.
- How accurate is this?
- It’s a planning-level estimate using 2026 national averages. Get contractor quotes for a firm price.
Plan the rest of your build
- Deck Board Calculator — how many boards and screws you need.
- Deck Footing & Concrete Calculator — footings and bags of concrete.
- Deck Stairs Calculator — risers, treads, and stringer length.