Cost guide · Illinois edition
Roof Replacement Cost in Illinois (2026)
In Illinois, roof replacement cost for the typical project costs about $11,600 — 4% above the national average of $11,200. The gap comes from labour: Illinois labour runs at 1.08× the national average, and labour is about 45% of an installed price, so the state figure below scales the labour share only and leaves material prices at national levels. Read the national guide for the full breakdown, then use this page for the Illinois numbers, city prices and code notes.
- $6,200
- low end in Illinois — simple spec
- $11,600
- typical in Illinois — most homeowners pay near this
- $24,850
- high end in Illinois — premium materials, complex site
- $6.84
- per sq ft of roof area installed, typical architectural shingle job, Illinois-adjusted
Typical project used for these figures: a 1,700 sq ft roof (about 17 squares) in architectural asphalt shingles, one old layer torn off. Ranges are 2026 planning figures for a professional installation in Illinois, derived from the national guide as explained below — always confirm with local quotes.
Illinois prices vs the national average
Materials for this project are priced nationally — a bundle of shingles or a pallet of panels costs roughly the same anywhere in the country before delivery. Labour is what moves, and Illinois labour sits at 1.08× the national average. Applying that index to the labour share (about 45% of the installed price) gives the Illinois range below. If your quotes cluster well outside it, the difference is usually specification — material grade, code extras or site difficulty — not the labour market, and it is worth asking which line moved.
| Figure | National average | Illinois | Difference |
|---|---|---|---|
| Low end | $6,000 | $6,200 | 4% above |
| Typical project | $11,200 | $11,600 | 4% above |
| High end | $24,000 | $24,850 | 4% above |
For the full national breakdown — what is included, what is billed separately, DIY vs pro, and what drives the price — read the national roof replacement cost guide. The table below re-prices that same breakdown for Illinois.
Cost breakdown, Illinois-adjusted
The national guide's line items, with materials held at national prices and labour scaled by the Illinois index of 1.08. Compare a real bid against this table line by line: if a contractor's labour lines run far above these figures, ask what is different about the job, and if the materials lines run far above, ask for the product grades.
| Line item | Materials | Labour (Illinois) | Total |
|---|---|---|---|
| Tear-off & disposalOne existing layer stripped, hauled and dumped | $150 | $1,500 | $1,650 |
| Decking repair allowanceReplacing a handful of damaged sheets; priced per sheet in most contracts | $300 | $300 | $600 |
| Underlayment & ice-and-water shieldSynthetic underlayment over the field, membrane at eaves and valleys | $550 | $500 | $1,050 |
| Architectural shinglesAbout 17 squares including waste and starter courses | $3,300 | $2,800 | $6,100 |
| Flashing, vents & ridge capStep and chimney flashing, vent boots, ridge ventilation and cap | $450 | $600 | $1,050 |
| Drip edge, starter strip & fastenersMetal drip edge at eaves and rakes, nails and sealants | $300 | $200 | $500 |
| Permits, inspection & cleanupPermit where required, magnetic nail sweep, site cleanup | $350 | $300 | $650 |
| Total for the typical projectState-adjusted from the national breakdown above | $5,400 | $6,250 | $11,650 |
Typical cost by city in Illinois
Labour markets differ within a state too. These city figures apply each city's multiplier to the Illinois typical price for the same project — use them to sanity-check a quote from a specific metro, not as a bid. Rural areas outside these metros often land below the cheapest city shown, while resort and island markets can exceed the highest.
| City | Typical project cost |
|---|---|
| Springfield | $10,450 |
| Peoria | $10,450 |
| Rockford | $10,650 |
| Aurora | $11,850 |
| Naperville | $12,300 |
| Chicago | $12,750 |
Illinois rules, climate and code that change the price
Illinois has no statewide residential building code — municipalities adopt their own, and Chicago runs its own comprehensive building code, which is why Chicago-area prices run well above downstate. Frost depth is 36–42 in across northern Illinois, and freeze-thaw cycles punish shallow footings and poorly drained bases. Chicago and its suburbs add strict permit, inspection and contractor-registration requirements; many smaller towns are lighter-touch but still require permits for structural work.
Roof Replacement Cost in Illinois: what to watch
Illinois roofing is a hail and ice story. The Chicago suburbs see regular hail, so Class 4 impact-resistant shingles are a common upgrade with insurance implications, and northern Illinois winters bring ice dams that punish poor attic ventilation. Chicago's own building code adds filing and inspection steps that suburban and downstate jobs do not face, and flat and low-slope roofs on Chicago two-flats and three-flats need membrane systems priced very differently from pitched shingles. For a pitched roof, the two items that separate a good Illinois quote from a cheap one are ice-shield coverage and ventilation.
What to ask contractors in Illinois
Four questions that catch the expensive surprises on this project in this state. Get the answers in writing, on the quote, before you compare prices — two quotes are only comparable when they describe the same job.
- Permit: Illinois leaves code adoption to municipalities, so permit rules vary: Chicago and its suburbs are strict and thorough, while smaller towns may be lighter but still require permits for decks, roofing and structural work. Always check the municipality, not the state, for the rule that applies to your address.
- Specification: Ask for the full material specification — grades, ratings and the code extras in the state notes above — not just a brand name and a total.
- Labour basis: Ask how the quote treats the Illinois labour market: a quote far above the $11,600 typical figure should name the extra work, access problem or specification that justifies it.
- Local references: Ask for two recent jobs in your city, not just your state — city prices above vary by thousands, and a contractor working regularly in your metro knows its permit office and inspectors.
Frequently asked questions — Illinois
Illinois leaves code adoption to municipalities, so permit rules vary: Chicago and its suburbs are strict and thorough, while smaller towns may be lighter but still require permits for decks, roofing and structural work. Always check the municipality, not the state, for the rule that applies to your address.
Illinois labour averages about 8% above national, driven by Chicago at roughly 10% above the state figure; downstate cities run about 10% below it. Deep frost footings and Chicago-code detailing are the local cost drivers national averages miss.
Budget around $11,600 for the typical project (a 1,700 sq ft roof (about 17 squares) in architectural asphalt shingles, one old layer torn off) in Illinois, with most jobs landing between $6,200 and $24,850. That typical figure is 4% above the national typical of $11,200, because Illinois labour runs at 1.08× the national average and labour is about 45% of the installed price. Get at least three local quotes before committing — the range above is a planning figure, not a bid.
Yes. Within Illinois, the typical project runs from about $10,450 in Springfield to about $12,750 in Chicago, reflecting local labour markets and, where applicable, stricter local code requirements. The city figures above are planning estimates from the state average, not quotes — a specific job's price depends on its specification, access and site conditions.