Wood Deck Cost in Illinois
Wood Deck in Illinois costs $18–$68 per sq ft in 2026. A typical 300 sq ft project averages $12,000. Illinois is in the Midwest region, where labor and materials run on the average end of national pricing.
Last updated
How much does a wood deck cost in Illinois? A wood deck in Illinois costs $5,400–$20,400 in 2026, with most homeowners paying around $12,000 for a typical 300 sq ft project.
Get Your Exact Illinois Estimate
Pre-set to wood deck in Illinois — enter your project size for a localized range.
How big is your Wood Deck?
A 10×10 deck is 100 sq ft. A 16×20 deck is 320 sq ft.
- Per sq ft
- $18–$68
- Typical range
- $5,400–$20,400
- Average
- $12,000
- Labor share
- 52%
Illinois Average Cost (2026)
Cost Breakdown
Based on a 300 sq ft project in the Midwest region. Actual costs vary by contractor, site conditions, and material choices.
Wood Deck Cost by Material in Illinois
Installed price per sq ft in Illinois, materials and labor combined.
| Material | Low | High |
|---|---|---|
| Pressure-Treated Wood | $17/sq ft | $25/sq ft |
| Composite | $41/sq ft | $53/sq ft |
Estimated from Illinois's overall wood deck pricing model; actual cost depends on brand, grade, and installation complexity.
Wood Deck Cost by Size in Illinois
150 sq ft, 300 sq ft, and 600 sq ft wood deck cost in Illinois — the most common sizes (2026).
| Project size | Low | Mid | High |
|---|---|---|---|
| 150 sq ft | $2,700 | $6,000 | $10,200 |
| 300 sq ft | $5,400 | $12,000 | $20,400 |
| 600 sq ft | $10,800 | $24,000 | $40,800 |
Based on $18–$68 per sq ft in the Midwest region. A 10×10 deck is 100 sq ft. A 16×20 deck is 320 sq ft.
Building a Wood Deck in Illinois: Local Factors
What makes wood deck projects in Illinois different from the national baseline.
Permits & codes
Illinois has no statewide residential building code — permit requirements are set by individual municipalities. Chicago requires a permit for all decks attached to the home or over 70 sq ft, with fees typically $175–$450 and inspections at framing and final. Suburban Cook County and collar-county municipalities follow IRC-based codes with similar permit requirements and fees of $150–$400. Frost depth is 42 inches in northern Illinois, requiring concrete piers or caissons rather than surface-pad foundations.
Climate & foundations
Illinois winters create significant structural demands on decks — freeze-thaw cycling causes wood checking and cupping, and snow loads must factor into framing design. Composite and PVC decking are increasingly popular across the Chicago metro for their lower winter maintenance requirements. Summer humidity can warp improperly kiln-dried lumber; specifying kiln-dried pressure-treated material is worth the small premium.
Market & timing
Chicago-area deck costs run 15–25% above the national average due to union labor influence and higher permit and inspection overhead. Downstate Illinois markets (Springfield, Peoria, Rockford) are closer to or at the national average. Spring and early summer are peak booking seasons across the state; fall builds often yield sharper bids as contractor schedules open up.
Financing Calculator
Estimate your monthly payment based on loan type and current rates.
Rates shown are approximate averages as of 2025 and will vary based on your credit score, lender, and loan-to-value ratio. Consult a lender for an accurate quote.
Return on Investment
How much value does a wood deck add to your home at resale?
How Wood Deck compares to other projects
ROI figures based on Remodeling Magazine Cost vs. Value Report 2024, national averages. Actual resale value depends on your market, home price tier, and project quality.
Find a Wood Deck Pro Near You
Get free quotes from top-rated local pros. No obligation.
Sponsored — BuildCost may earn a referral fee at no extra cost to you. This site connects you with independent service professionals through a third-party matching platform.
Frequently Asked Questions
How much does a wood deck cost in Illinois?
In Illinois, a typical 300 sq ft wood deck project costs between $5,400 and $20,400, with a mid-range average of $12,000. Illinois is in the Midwest region.
How much is labor for a wood deck in Illinois?
Labor accounts for approximately $6,240 of the total cost for a 300 sq ft wood deck project in Illinois. The Midwest offers near-average labor costs with competitive contractor markets in most metro areas.
Do I need a permit to build a wood deck in Illinois?
Illinois has no statewide residential building code — permit requirements are set by individual municipalities. Chicago requires a permit for all decks attached to the home or over 70 sq ft, with fees typically $175–$450 and inspections at framing and final. Suburban Cook County and collar-county municipalities follow IRC-based codes with similar permit requirements and fees of $150–$400. Frost depth is 42 inches in northern Illinois, requiring concrete piers or caissons rather than surface-pad foundations.
Which wood deck material costs the least in Illinois?
Pressure-Treated Wood is typically the least expensive option in Illinois, running $17–$25 per sq ft installed. Composite runs the highest, at $41–$53 per sq ft.
How do I find a contractor for a wood deck in Illinois?
Get at least 3 quotes from licensed local contractors, verify their license with Illinois's contractor licensing board, and check reviews on Google or the BBB. Use our free estimate tool to understand fair pricing before you negotiate.
Does a wood deck add value to your home in Illinois?
On average, a wood deck recoups about 95% of its cost at resale nationwide. For a $12,000 project in Illinois, that's approximately $11,400 in added home value. Actual ROI varies by neighborhood and market conditions.
Wood Deck Cost by Illinois City
Local pricing, permit notes, and climate factors for major Illinois metros.
Wood Deck Calculators
Estimate exact costs and material quantities for your wood deck project.
Other Home Improvement Costs in Illinois
Wood Deck Cost in Nearby States
Get Your Estimate
How big is your Wood Deck?
A 10×10 deck is 100 sq ft. A 16×20 deck is 320 sq ft.
Pro Tips
- Get at least 3 contractor quotes
- Ask about permit requirements
- Budget 10–20% contingency
- Check contractor licenses
Wood Deck Cost by State
See the Full Picture
Curious how Illinois compares across every project type, not just wood deck?
View the 2026 Construction Cost Index →