Deck Cost Calculator
Use this deck cost calculator to estimate the total cost of building a deck based on size, material type, and price per square foot. Designed for homeowners, DIY builders, and contractors using standard US measurements to plan outdoor projects and budget accurately before construction begins.
× (Material + Labor) Cost per sq ft
PT Wood $8–$15 · Cedar $11–$20 · Redwood $12–$22 · Composite $15–$25 · PVC $18–$30 · Hardwood $20–$40 (installed per sq ft)
Estimates based on 2026 US average pricing. Actual costs vary by region. Always get 3 quotes before starting.
How Does the Deck Cost Calculator Work?
This deck cost calculator estimates the total cost of building a deck based on your dimensions, material choice, and whether you hire a contractor or build it yourself. It uses 2026 US average pricing across 6 popular decking materials.
Steps:
- Enter your deck length and width in feet.
- Select your decking material — pressure treated wood, cedar, composite, PVC, redwood, or hardwood.
- Choose DIY (materials only) or Contractor (includes labor).
- Get instant results — total cost range, cost per sq ft, deck area, material cost, and labor cost.
Most decks over 200 sq ft or more than 30 inches above grade require a building permit. Always check local codes before starting. Permits typically cost $200–$500 and protect your home's value when you sell.
Deck Cost by Material Type (2026)
Material choice is the biggest cost driver for any deck project. Here's a full breakdown of 2026 US average installed costs per square foot for all 6 materials in the calculator.
| Material | Material $/sq ft | Installed $/sq ft | 200 sq ft Deck | Lifespan |
|---|---|---|---|---|
| Pressure Treated Wood | $3 – $6 | $8 – $15 | $1,600 – $3,000 | 15–25 yrs |
| Cedar | $5 – $9 | $11 – $20 | $2,200 – $4,000 | 15–25 yrs |
| Redwood | $6 – $10 | $12 – $22 | $2,400 – $4,400 | 20–30 yrs |
| Composite Decking | $8 – $14 | $15 – $25 | $3,000 – $5,000 | 25–30 yrs |
| PVC / Vinyl | $10 – $18 | $18 – $30 | $3,600 – $6,000 | 25–30 yrs |
| Hardwood (Ipe/Teak) | $12 – $22 | $20 – $40 | $4,000 – $8,000 | 40–75 yrs |
*200 sq ft deck total includes labor. Framing, footings, and stairs are additional costs.
Pressure treated wood is the most affordable entry point. Composite decking costs more upfront but requires almost no maintenance — no staining, sealing, or sanding. Over 25 years, composite typically costs less than wood when maintenance is factored in.
Example Calculation
You want to build a composite deck that is 20 ft × 16 ft, hired contractor.
20 ft × 16 ft = 320 sq ft
Step 2 — Material cost (composite $8–$14/sq ft):320 × $8 = $2,560 | 320 × $14 = $4,480
Material: $2,560 – $4,480
320 × $7 = $2,240 | 320 × $11 = $3,520
Labor: $2,240 – $3,520
$4,800 – $8,000
Step 5 — Cost per square foot:$15 – $25 per sq ft
Factors That Affect Deck Cost
Deck Height & Footings
Ground-level decks are cheapest. Elevated decks require deeper footings, longer posts, and more structural framing — adding $2–$6 per sq ft to the total cost. Decks over 30 inches typically require engineered footings and permits.
Stairs & Railings
Stairs cost $150–$400 per step installed. Railings add $20–$60 per linear foot. A 40 ft deck perimeter with railings adds $800–$2,400 on top of the decking cost.
Shape & Complexity
Simple rectangular decks are the cheapest to build. L-shaped, curved, or multi-level decks add 20–40% to labor costs due to more complex framing and cutting.
Permits & Inspections
Most decks over 200 sq ft or 30 inches above grade require permits costing $200–$500. Always pull a permit — unpermitted decks are flagged during home sales and can be required to be torn down.
Region & Labor Market
Labor costs in the Northeast and West Coast run 25–40% higher than the national averages in this calculator. Schedule in fall or early spring to potentially negotiate 10–15% off peak summer pricing.
Deck contractor pricing varies widely. Always get 3 itemized quotes. Ask each contractor to break out decking material, framing, footings, railings, stairs, and permit fees separately.