The cost of a new roof in Chicago depends on the roof’s size, material, complexity, and more. Learn how much roof replacement costs in Chicago.
How Much Does It Cost to Replace a Flat Roof in Chicago? [2026 Data]
Roofing costs depend on your project and location. Check with a local pro for your specific job.
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Cost Insights
Chicago homeowners pay an average of $10 to $20 per square foot for flat roof replacement.
Roofing companies in Chicago charge between $3 and $7 per square foot for labor.
Homeowners can see a return on investment (ROI) of 50% to 70% when upgrading a flat roof.
When budgeting for a flat roof replacement in Chicago, homeowners need to account for the area’s higher cost of living and increased labor rates. The cost to replace a flat roof in Chicago averages $12,067, with most projects falling between $5,681 and $19,269. The top factors affecting total costs are the roof's size and material, its design, the application method, and labor requirements. In the windy city, it’s also common to budget for enhanced insulation and wind-resistant materials to help protect your home from weather-related damage.
Flat Roof Replacement Cost Factors
The cost to replace a flat roof in Chicago, Illinois, depends on factors such as your roof size, type, material, and the application method. You’ll also need to budget for demolition costs, prep work, and, if necessary, inspections.
Size
Calculating the size of your roof can help you estimate the cost of a replacement. For a rough approximation, measure the length of your house's exterior, then multiply it by the width to get the size of your flat roof. Consider adding a small percentage to account for any overhangs.
Here are estimated costs by roof size—but keep in mind that the type of roof you plan on replacing, as well as the material, greatly affect your flat roof replacement cost:
| Roof Size (Sq. Ft.) | Average Cost |
|---|---|
| 1,000 | $10,000–$20,000 |
| 1,500 | $15,000–$30,000 |
| 2,000 | $20,000–$40,000 |
| 2,500 | $25,000–$50,000 |
| 3,000 | $30,000–$60,000 |
Materials
Like traditional sloped roofs, flat roofs offer a multitude of material options. Each has its own cost estimate, advantages, and disadvantages. Many flat roofing materials look similar, so discuss options with your pro.
Here’s a breakdown of estimated flat roof replacement costs based on material:
| Roof Material | Average Cost per Sq. Ft. | Features |
|---|---|---|
| Fiberglass | $4.50–$7 | Lasts 25-30 years; not durable |
| Rubber | $4–$13 | Resistant to warm weather and UV rays |
| Thermoplastic polyolefin (TPO) | $4.50–$10 | Good at handling water pools; single-ply system |
| EPDM | $5–$12 | Made from oil and natural gas byproducts; 10–25-year lifespan |
| Built-up tar | $5.75–$10 | Fire-resistant; low-maintenance; lasts 30 years |
| Glass-reinforced polyester (GRP) | $4–$6 | Weather-resistant; needs very dry installation; lasts 30 years |
| Modified bitumen | $4–$8 | Fully recyclable; low water-resistance; 10-20-year lifespan |
Roof Type
There are several types of flat roofs, including cold roofs, warm roofs, and green roofs. The type of flat roof will influence the price you pay for a replacement.
Here’s how much flat roof replacement might cost based on roof type:
| Flat Roof Type | Average Cost per Sq. Ft. | Features |
|---|---|---|
| Cold | $5–$10 | Insulation is below the roof deck, typically inside the joists or rafters; a ventilation gap is placed above the insulation; more susceptible to condensation |
| Warm | $7–$12 | Insulation is located on top of the roof deck, above the vapor barrier and below the waterproof membrane; energy-efficient; good moisture control; straightforward installation |
| Inverted | $5–$10 | A type of warm roof with reversed layers, shielding the waterproof membrane from the elements |
| Hybrid | $5–$12 | Insulation is split above and below the roof deck; increased risk of condensation; often used when a full warm roof is not possible |
| Curved | $9–$17 | Low-slope roof that has a gentle curve; has flat roof features but a sloped aesthetic; the slope improves drainage |
| Tapered | $8–$11 | Flat roof with a gentle slope created with tapered insulation boards; the design ensures proper drainage and prevents standing water |
| Green | $11–$38 | Partially or completely covered with vegetation; has layers like a root barrier and drainage system; environmental and economic benefits |
Application Method
The most common application methods for flat roofs are ballasted, fastened, and fully adhered. Here’s how the flat roof application type might influence your cost:
Ballasted roofs: $1.65 to $2.25 per square foot
Fastened attachment method: $2.20 to $3.35 per square foot
Fully adhered method: $3 to $3.90 per square foot
Demolition and Prep
When you hire a roofing pro, they might charge extra for removing the existing roof. This costs about $1.50 to $6 per square foot, or an average of $1,200 to $2,500 total. Prep involves removing debris, mold, or algae and repairing any damage.
Flat Roof Replacement Pro Costs
Labor makes up a significant portion of flat roof replacement costs in Chicago. When budgeting, consider the cost of hiring a Chicago roofer, permit fees, warranties, and additional pros you may need to hire.
Labor
Roofers charge $3 to $7 per square foot for labor, and a flat roof replacement takes about five days, depending on the size and complexity of the job. Some roofing materials, such as built-up tar, are more time-consuming to install, which will affect the overall labor cost. If you’re quoted a fee based on the total project cost, expect a markup of 20% to 30% of the job.
Permits
Depending on where you live, you may need to pay for a building permit to replace your roof. These permits cost between $100 and $600, with higher fees for roofs larger than 1,000 square feet.
Inspections
It’s a good idea to hire a professional to conduct a final inspection after the roof has been replaced. This will ensure that the contractor did quality work. Expect to pay between $120 and $320 for this inspection.
Warranties
New roofs should include manufacturer warranties that cover the roofing materials. If you’re comparing similar materials, prioritize the option with the longest and most comprehensive warranty. You can also check online reviews or ask the contractor for clarification.
Additional Pros to Consider Hiring
Your roofing contractor handles the bulk of your flat roof replacement, but depending on the scope of your project, you may require additional pros to complete the job. Consider hiring the following contractors if necessary:
Structural engineer: Older homes in Chicago often require structural upgrades to accommodate heavier ballast systems or green roofs, and the help of a structural engineer can cost $400 to $800.
General contractor: If your roof replacement is part of a larger renovation, you’ll often need to hire a general contractor to coordinate trades, which can increase total costs by 10% to 20%.
Does a Flat Roof Increase Home Value?
Replacing a flat roof is a solid investment for Chicago homeowners, offering a return on investment (ROI) of 50% to 70% for most projects. With Chicago’s heavy winter snowfall and strong winds, an aging or failing flat roof can be a major liability for sellers. Upgrading your roof with a new, professionally-installed replacement helps cut utility costs, improve safety, and offer peace of mind for potential buyers.
How Angi Gets Its Cost Data
Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We survey real Angi customers about their project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We pair this data with research from reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects.
Want to help us improve our cost data? Send us a recent project quote to [email protected]. Quotes and personal information will not be shared publicly.
Roofing services reviews from real Angi homeowners in Chicago, IL
4.4★ avg. • 433 total reviews
- Charlotte M.
Very happy with the roofing work William completed for me. Professional crew, fair pricing, and everything was cleaned up afterward
Home Genius Exteriors - Susan S.
John patched efficiently my old roof for years and years. It finally needed to be replaced. He removed a half-dozen layers of old roof, replaced some rotten boards and disintegrated brick, and installed a new roof. It has been faultless through three winters. I should add that it is a flat...
Logan Square Roofing & Tuckpointing - Gary C.
Sergio and crew were amazing. He came out, inspected the roof, and gave me a quote the same day. The crew came out and made the repairs the same week. They did an excellent job and corrected some shingles from the previous contractor. The price was more than reasonable! I highly...
Andres Roofing & Construction, Inc. - Alycia D.
Highly recommend Steve at Qualified Roofing! He walked us through the roof damage with great expertise and was very transparent about the repairs needed His communication was excellent throughout the process. It’s a huge weight off our shoulders to have the roof secured before the next storm.
- Edison P.
Very good roofing company, 100% recommended.
JM ROOFING SOLUTIONS - Kevin O.
Quickly and thoroughly layered a new roof over existing shingles. Installed 4 needed vents and drip edges. Friendly and gave us a substantial veterans discount as well as subtracting $300 from initial estimate after discovering that a section of sheathing did not require replacement. Good...
M & M Roofing - Frank B.
B&f roofing was one of the most well experienced companies I have used in years there customer service was great they used high quality material there timing was on point I will definitely use them in the future an surely recommend to friends an family
B&F Roofing and tuckpointing - Jose Z.
Cayetano Construction corp did an excellent job on my roof. They were quick and efficient. Cayetano construction tackled my roofing problem so professional that made me so glad i made a good choice on picking them for my roofing. im looking forward to working with them for my future projects.
Cayetano Construction Corp - Thomas S.
Paul at Chicago Roofing was very flexible and integrated my suggestions into the project.
Chicago Roofing Assistance Company, Inc. - Naomi L.
This was our first experience replacing a roof and the performance of Chicago Prestige roofing crew was outstanding! They finished the job in a day and a half and the results were excellent. The crew was non stop and when they weren't installing the new roof they were constantly cleaning up!...
Chicago prestige roofing
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