Roof Replacement Cost in Illinois (2026)
A roof replacement in Illinois typically runs $8,800–$22,000 in 2026 for a mid-size, mid-range job. Illinois renovation prices sit about 10% above the national average, so local costs run 10% above what you'd pay nationally.
Roof Replacement cost in Illinois by size and quality
These ranges take the national roof replacement baseline of $8,000–$20,000 and apply Illinois's cost index of 1.10× — meaning local labor and materials run about 10% above the national average. Pick the row and column that match your project.
| Size / scope | Budget | Mid-range | High-end |
|---|---|---|---|
| Small compact / partial | $4,800 – $12,000 | $6,200 – $15,400 | $10,500 – $26,200 |
| Medium average scope | $6,900 – $17,200 | $8,800 – $22,000 | $15,000 – $37,400 |
| Large big / whole space | $10,600 – $26,600 | $13,600 – $34,100 | $23,200 – $58,000 |
Highlighted cell = a typical mid-size, mid-range roof replacement in IL. National baseline ranges adjusted by Illinois's 1.10× cost index. Your actual cost varies with scope, finishes, and contractor.
What the 1.10× cost index means: if a roof replacement averages $8,000–$20,000 nationally, the same job in Illinois averages $8,800–$22,000 — about 10% above the national average — before your specific size and finish choices.
Illinois roof replacement calculator
Pre-adjusted for Illinois (1.10× national). Results below are Illinois-specific.
Size / scope
Quality level
Planning a roof replacement in Illinois? Roof replacement cost is driven mostly by two things: the square footage (and pitch) of your roof and the material you choose. Asphalt shingles are the budget default; metal, tile, and slate cost multiples more but last decades longer. This calculator estimates a full tear-off and replacement for a typical single-family home.
Illinois cost factors
Illinois costs are split: Chicago's strong union labor and permitting push metro renovations well above average, while downstate remains far cheaper.
What drives roof replacement cost
- Roof size and pitch — steep, complex roofs with many valleys and dormers cost more to work on safely
- Material — asphalt shingle is the baseline; metal, clay tile, and slate multiply the price
- Tear-off and disposal of the old roof, plus any rotted decking that has to be replaced underneath
- Number of roof penetrations — chimneys, skylights, and vents each need new flashing
Roof Replacement cost in Illinois — frequently asked questions
How much does it cost to replace an asphalt shingle roof?
For a typical home, an asphalt shingle tear-off and replacement usually falls in the lower-to-middle part of this range. Larger or steeper roofs and premium architectural shingles push it higher. Keep the quality on Budget or Mid-range for standard asphalt.
Is metal roofing worth the extra cost?
Metal costs roughly 2-3x asphalt up front but can last 40-70 years versus 15-25 for shingles, plus it's more energy-efficient and fire-resistant. Set quality to High-end to model a metal or tile roof. It's a strong long-term value if you're staying in the home.
Can I just add a layer over my old roof?
An overlay (roofing over existing shingles) is cheaper because it skips the tear-off, but most codes allow only two layers total, it hides deck damage, and it shortens the new roof's life. A full tear-off is what this calculator estimates and is generally the better long-term choice.
How much does a roof replacement cost in Illinois?
In Illinois, a typical roof replacement runs about $8,800–$22,000 for a mid-size, mid-range project in 2026. That reflects Illinois's cost index of 1.10× — roughly 10% above the national average — applied to national baselines. Illinois costs are split: Chicago's strong union labor and permitting push metro renovations well above average, while downstate remains far cheaper. Use the calculator above to adjust for your size and finish level.