Attic Conversion Cost in Illinois (2026)
Compare attic conversion costs across 3 cities in Illinois. Prices range from $43,200 in Aurora to $48,800 in Naperville.
State average
$46,533
Range
$43,200 – $48,800
Cities tracked
3
City comparison
| City | Avg cost | Budget range | High-end range | vs state avg |
|---|---|---|---|---|
| Naperville, IL | $48,800 | $16,500–$20,100 | $98,800–$126,300 | +5% |
| Chicago, IL | $47,600 | $16,100–$19,600 | $96,400–$123,200 | +2% |
| Aurora, IL | $43,200 | $14,600–$17,800 | $87,500–$111,800 | -7% |
Explore each city
Naperville, IL
Avg: $48,800 · $16,500–$126,300
Chicago, IL
Avg: $47,600 · $16,100–$123,200
Aurora, IL
Avg: $43,200 · $14,600–$111,800
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Frequently asked questions
The average attic conversion in Illinois costs $46,533. Prices range from $43,200 in Aurora to $48,800 in Naperville. Costs vary by city due to differences in labor rates, material availability, and local code requirements.