The price depends on the type of roof you have. For flat roofs, the average in Illinois is $15 per square foot installed, with a range of $12 to $20 per square foot depending on the specific conditions of your property. For residential shingle roofing, the price runs approximately $5 to $7 per square foot installed. If you want to go with premium materials — wood shakes, slate, or luxury roofing systems — you are looking at $20 to $40 per square foot.
Those are the numbers Premier Group Roofs works with on real jobs in Illinois every day. What moves your specific project within those ranges comes down to a handful of conditions we evaluate during every inspection. Below is a full breakdown by roof type so you know what to expect before anyone visits your property.
Flat Roof Replacement Cost in Illinois — $12 to $20 per Sq Ft
For any flat roof — commercial buildings, apartment complexes, or residential homes with a flat or low-slope design — the average installed cost in Illinois is $15 per square foot. The realistic range is $12 to $20 per square foot. Every project lands somewhere in that range based on three conditions:
What Determines the Price of a Flat Roof Replacement
- Access to the roof. How easy is it for the crew to get up there, stage material, and operate safely? A building with straightforward access runs lean. Restricted access — no clear perimeter, obstacles that require special equipment — adds time and cost.
- How many layers exist and whether a layover is possible. If the existing membrane is in decent condition and only one layer is present, it may be possible to install the new system directly on top — a layover — without tearing off the old one. That saves significant labor. If two layers already exist, or if the old membrane is damaged, everything comes off first, which adds cost.
- Other site conditions. The condition of the deck underneath, drainage design, flashing complexity, and equipment access all factor into where your project lands on the $12–$20 scale.
The honest starting point: Budget $15 per square foot for a flat roof replacement in Illinois and let an in-person inspection tell you whether your project comes in above or below that number.
| Building Size (Flat Roof) | At $12/sq ft | At $15/sq ft (average) | At $20/sq ft |
| 2,500 sq ft | $30,000 | $37,500 | $50,000 |
| 5,000 sq ft | $60,000 | $75,000 | $100,000 |
| 10,000 sq ft | $120,000 | $150,000 | $200,000 |
| 20,000 sq ft | $240,000 | $300,000 | $400,000 |
Residential Shingle Roof Replacement — $5 to $7 per Sq Ft
For a standard residential shingle roof, the installed price in Illinois runs approximately $5 to $7 per square foot. That range covers asphalt shingles — the most common material for homes in the Midwest. Where your specific project falls within that range depends on three factors.
What Affects Your Shingle Replacement Cost
- Condition of the roof deck. The deck is the structural layer underneath the shingles — the frame of the house. If sections of it are damaged, rotted, or soft from water exposure, those areas have to be repaired or replaced before new shingles go on. This is not something visible from the outside. It shows up once the old material is off.
- Height and elevation of the property. A two-story home, a steeply pitched roof, or a property on elevated terrain requires additional safety setup, slower work pace, and more equipment. That translates directly into labor cost.
- Lot conditions and access. Can a dumpster park close? Is there room to stage material? Tight lots — common in older Chicago suburb neighborhoods — add time to every step of the job.
| Home Size | At $5/sq ft | At $6/sq ft | At $7/sq ft |
| 1,000 sq ft home | ~$5,500–$6,500 | ~$6,600–$7,800 | ~$7,700–$9,100 |
| 1,500 sq ft home | ~$8,000–$10,000 | ~$9,600–$12,000 | ~$11,200–$14,000 |
| 2,000 sq ft home | ~$11,000–$13,000 | ~$13,200–$15,600 | ~$15,400–$18,200 |
| 2,500 sq ft home | ~$13,500–$16,500 | ~$16,200–$19,800 | ~$18,900–$23,100 |
| 3,000 sq ft home | ~$16,000–$20,000 | ~$19,200–$24,000 | ~$22,400–$28,000 |
**Estimates based on Premier Group Roofs pricing, Illinois market. Deck repairs, permits, and specialty flashing are quoted separately after inspection.
Luxury Roofing Materials — $20 to $40 per Sq Ft
If you want to go beyond standard asphalt shingles — into wood shakes, natural slate, or other premium roofing systems — the price range is $20 to $40 per square foot installed. This is a different product category, not just an upgrade to a better shingle. These materials change the weight requirements, the installation method, and in some cases the structural requirements of your home.
The wide range reflects the difference between options like premium synthetic shakes at the lower end and natural slate or high-end metal tile at the upper end. Premier Group can walk you through which options make sense for your home’s structure and your budget.
Frequently Asked Questions
The average is $15 per square foot installed, with a range of $12 to $20. What moves the number is how accessible the roof is, how many existing layers need to come off, and whether a layover is possible and advisable.
Approximately $5 to $7 per square foot installed. The exact price depends on the condition of the roof deck, the height and pitch of the roof, and how accessible your lot is for equipment.
Luxury materials like natural slate, premium wood shakes, and high-end metal tile systems run $20 to $40 per square foot installed. These are specialty installations that require specific structural assessments before work begins.
A layover means installing new roofing material directly over an existing layer without removing it first. It is one of the factors that can bring a flat roof project toward the lower end of the $12–$20 range. Whether it is the right call depends on how many layers already exist and the condition of the current membrane — something we evaluate during every inspection.
The only accurate answer comes from a physical inspection of your specific roof. An estimator needs to see the deck, measure the actual surface area, evaluate access, and check the number of existing layers. Premier Group Roofs provides free on-site inspections throughout Bloomingdale and the Chicago suburbs.
If the damage was caused by a covered event — hail, wind, storm damage, or a fallen tree — your policy may cover a full replacement. Most clients who qualify pay only their deductible. Premier Group works directly with insurance adjusters to document the damage and guide the claim from inspection to approval
Get a Free Inspection — Premier Group Roofs, Bloomingdale IL
An accurate quote starts with someone actually looking at your roof. We inspect residential and commercial properties throughout Bloomingdale, DuPage County, and the Chicago suburbs at no cost. If your roof qualifies for an insurance claim, we will tell you — and we will help you through the process.
- Free on-site inspection — DuPage County and Chicago suburbs
- Insurance claim assistance — from documentation to adjuster coordination
- GAF and CertainTeed certified — manufacturer-backed warranties
- Versico certified — commercial flat roof systems
- BBB accredited · NRCA member · MBE/WBE certified
Need a Roof Replacement? Call Premier Group now.
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Bloomingdale · Naperville · Aurora · Wheaton · Downers Grove · DuPage County · Rockford area · Kankakee area
You pay only your deductible. We handle everything else.