Home Addition Cost in Illinois (2026)
Compare home addition costs across 3 cities in Illinois. Prices range from $59,400 in Aurora to $67,100 in Naperville.
State average
$63,967
Range
$59,400 – $67,100
Cities tracked
3
City comparison
| City | Avg cost | Budget range | High-end range | vs state avg |
|---|---|---|---|---|
| Naperville, IL | $67,100 | $22,000–$26,800 | $131,800–$168,400 | +5% |
| Chicago, IL | $65,400 | $21,400–$26,200 | $128,500–$164,200 | +2% |
| Aurora, IL | $59,400 | $19,400–$23,800 | $116,600–$149,000 | -7% |
Explore each city
Naperville, IL
Avg: $67,100 · $22,000–$168,400
Chicago, IL
Avg: $65,400 · $21,400–$164,200
Aurora, IL
Avg: $59,400 · $19,400–$149,000
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Frequently asked questions
The average home addition in Illinois costs $63,967. Prices range from $59,400 in Aurora to $67,100 in Naperville. Costs vary by city due to differences in labor rates, material availability, and local code requirements.