Roof Replacement Contractors in Chicago, IL: What to Ask Before You Hire
Chicago is a two-roof city: pitched shingle roofs on bungalows and frame houses, and low-slope flat roofs on two-flats, three-flats and greystones. They are different trades with different failure modes, and Illinois is one of the few states that licenses roofing contractors specifically — so verification here is easy and non-negotiable.
By Jason Green · Roofing & Gutters · Published August 25, 2026 · 7 min read
What a roof replacement costs in Chicago
A 20 to 25 square asphalt shingle tear-off and replacement runs $12,000 to $20,000 in 2026, including ice-and-water shield at the eaves — which the freeze-thaw cycle here makes mandatory in practice, not optional.
Low-slope work is priced by system: modified bitumen runs $9 to $15 per square foot installed, and single-ply TPO or EPDM runs $8 to $14. A typical three-flat flat roof lands between $14,000 and $28,000.
Illinois licenses roofers — use it
Illinois requires a state roofing contractor license issued by IDFPR, and the license number (in the 104-xxxxxx format) must appear on contracts, bids and vehicles. If a bid does not carry one, that is the end of the conversation.
Verify the number on IDFPR's license lookup, then confirm the certificate of insurance comes from the carrier directly and that the crew carries workers' compensation. Chicago also requires a permit for reroofing, pulled in the contractor's name.
Freeze-thaw questions that separate the bids
How far up the roof does the ice-and-water membrane run? Two courses at the eaves is the bare minimum on a Chicago roof; valleys and low-slope transitions need it too.
What is the ventilation plan? Ice dams here are usually an attic heat-loss problem, and a roofer who only talks about shingles will not fix them.
On a flat roof: what is the drainage plan, and how are the scuppers and parapet flashings detailed? Standing water plus a hard freeze is what actually kills Chicago flat roofs.
Who is on the roof, and does the bid name a per-sheet decking price for rot found during tear-off?
Timing the work
April through October is the practical window; shingles need warmth to seal and torch-applied and adhered flat systems have temperature minimums. Cold-weather installs are possible but ask specifically how the crew handles adhesion.
Book spring work in late winter. Chicago crews fill their calendars before the first warm week.
Typical cost ranges
| Asphalt shingle replacement, 20-25 squares | $12,000 - $20,000 |
| Flat roof, modified bitumen (per sq ft) | $9 - $15 |
| Flat roof, TPO or EPDM (per sq ft) | $8 - $14 |
| Two- or three-flat flat roof replacement | $14,000 - $28,000 |
| Tuckpointing and parapet repair | $1,800 - $7,500 |
Ranges are general estimates gathered from homeowner-reported quotes, not an offer or a quote for your project.
Common questions
How much does a new roof cost in Chicago?
$12,000 to $20,000 for a standard asphalt shingle tear-off and replacement in 2026. A three-flat flat roof runs $14,000 to $28,000 depending on system.
Do Chicago roofers need a license?
Yes. Illinois requires a state roofing contractor license from IDFPR, and the 104-format number must appear on the bid and contract. Verify it before signing.
Why does my Chicago roof keep getting ice dams?
Almost always attic heat loss and weak ventilation rather than the shingles. A bid that addresses insulation, air sealing and ridge/soffit ventilation is the one to take seriously.
Can roofing be done in a Chicago winter?
Emergency repairs, yes. Full replacements are better scheduled April through October because shingles need warmth to seal and flat systems have temperature minimums.
Want real numbers for your own project?
Two minutes now beats weeks of unreturned calls. Free, no obligation, never more than three roofers.
Get My Free Roofing QuotesLocal cost ranges, seasons, permits and licensing for this city live on the market page.
Roofers in Chicago, ILSources
More guides
The Henry Standard
Every roofer in our network agrees to three things.
Show up
Call back. Keep appointments. And if something changes, communicate it.
Quote honestly
Clear scope, materials, and pricing in writing—so you know what you're agreeing to.
Finish the work
See the job through and take care of the agreed-upon work before calling it finished.
Nothing revolutionary. Just the way we believe doing business should still be done.