Roof Cost Index
Illinois Roof Cost Index
Score 105 vs. national baseline 100. Modeled roofing cost ranges and market factors for Illinois.
Historical Trend (Modeled)
The data model already tracks monthly, quarterly, and yearly history. The values below are modeled placeholders until contractor pricing feeds are integrated.
| Month | Index | $/sqft |
|---|---|---|
| 2025-07 | 102.93 | $4.64 |
| 2025-08 | 102.42 | $4.61 |
| 2025-09 | 101.88 | $4.59 |
| 2025-10 | 101.69 | $4.58 |
| 2025-11 | 102.07 | $4.6 |
| 2025-12 | 102.97 | $4.64 |
| 2026-01 | 104.08 | $4.69 |
| 2026-02 | 105.02 | $4.73 |
| 2026-03 | 105.45 | $4.75 |
| 2026-04 | 105.3 | $4.74 |
| 2026-05 | 104.76 | $4.72 |
| 2026-06 | 104.2 | $4.69 |
| Quarter | Index | $/sqft |
|---|---|---|
| 2025-Q3 | 102.41 | $4.61 |
| 2025-Q4 | 102.24 | $4.61 |
| 2026-Q1 | 104.85 | $4.72 |
| 2026-Q2 | 104.75 | $4.72 |
Illinois Roofing Market Factors
Climate exposure — hail, hurricane wind, snow load, UV — drives material spec, code requirements, and replacement frequency.
Regional labor cost, licensing requirements, and crew availability shift installed pricing more than materials in most markets.
Asphalt, metal, and tile commodity pricing varies by region due to freight, distribution, and local manufacturer presence.
Wind/hail deductibles, ACV vs RCV policy structure, and Florida/Texas-style mitigation rules influence what homeowners actually pay out of pocket.
- Freeze-thaw cycles damage flashing
- Hail damage frequency
- High wind events
Related Calculators
Related State Resources
Frequently Asked Questions
What is the Roof Cost Index score for Illinois?
Illinois's current Roof Cost Index score is 105, which is 5.0 points above the national baseline of 100.
How much does a new roof cost per square foot in Illinois?
Modeled installed roofing in Illinois ranges from about $3.69 per square foot for builder-grade work up to $6.85 per square foot for premium materials and complex roofs, with a mid-range estimate near $4.73.
Why are roofing prices in Illinois at this level?
Snow, wind, hail, freeze-thaw cycles. Local labor cost, popular materials (Asphalt Shingles), and insurance practices also shape installed pricing.
Is Illinois more expensive than the U.S. average?
Yes. Illinois prices roughly 5.0% above the U.S. average for residential roofing.
How is the Illinois Roof Cost Index calculated?
It combines the state's cost multiplier, climate exposure profile, and labor signals from our state cost guides, normalized against a national baseline of 100.
When was the Illinois Roof Cost Index last updated?
The index was last refreshed on 2026-06-01. We plan quarterly methodology refreshes as more pricing inputs come online.
What's the most common roofing material in Illinois?
Asphalt Shingles is the most widely installed material in Illinois, driven primarily by snow, wind, hail, freeze-thaw cycles.
Can I get an accurate Illinois roof quote from this index?
The index is a benchmark, not a quote. Use our state-specific calculators and request a free estimate for binding pricing.