How much does a flat roof cost?
Roofers Hotline books a flat roof across 51 states, including 38 metro areas and 775 towns, from one number, (855) 512-1072. Calls are answered 24 hours a day and every estimate is put in writing before work starts.
Typical ranges from our cost model, with the local drivers that move the price.
- Written estimate before any work starts
- Calls answered 24 hours a day, 7 days a week
- A roofer calls you back, usually within one business day
- Deductibles are never waived or rebated
What flat roof cost covers
A flat roof price covers the membrane that keeps water out, plus the work needed to prepare the surface underneath it. Published 2026 cost guides (Fixr and This Old House) list three common membranes: TPO, EPDM rubber and modified bitumen, each with its own typical range and unit price.
Modified bitumen runs $6,800 to $15,300, or $400 to $900 per square. EPDM runs $6,800 to $22,100, or $400 to $1,300 per square, and TPO runs $6,800 to $23,800, or $400 to $1,400 per square. These are typical ranges, not a quote from Roofers Hotline.
The written estimate turns those ranges into line items for your roof. Call for flat roof repair or replacement and ask for the membrane, the prep work and the finish to be listed separately.
Material by material, what roof replacement costs lays out the prices behind the ranges above. Prices by material and job are under what roof repair costs, with the published ranges are above.
A flat roof that holds water after rain, with a soft spot near a drain, is usually the moment to call. Roofers Hotline books the roof inspection and a written estimate before any work starts, so you see a price for your roof and not a published average.
Published 2026 cost guides put a flat roof with a TPO membrane at $6,800 to $23,800. That range is wide because pitch, layers and decking differ from one roof to the next. Call Roofers Hotline, 24 hours a day, and ask for the written estimate that fits your roof.
For a worked example from one metro area, see the Milwaukee hail and storm damage guide, which covers the same ground for its own county. Read shingle roofing explained for the work step by step, from the first call to the written estimate.
- 38 Metro areas servedsix roofing services in each
- 26,909 ZIP codes served51 states, callback coverage
- 1,554 Hail events, one inch or largercounties of the 38 metro areas, since 2015
- 319 Wind events, 65 knots or morecounties of the 38 metro areas, since 2015
- 842 Federal weather disaster declarationscounties of the 38 metro areas, all years
Sources: U.S. Census ACS 2019 to 2023; NOAA Storm Events; OpenFEMA declarations. Updated October 2026.
What moves flat roof cost up or down
The membrane you choose is the first thing that moves the price. The guides put modified bitumen at $6,800 to $15,300, EPDM at $6,800 to $22,100 and TPO at $6,800 to $23,800.
Beyond the membrane, three roof conditions decide where your job lands in that range: pitch, layers and decking. A roof with an old layer to remove costs more to prepare than a clean surface, and soft or damaged decking has to be dealt with before any new membrane goes down.
Here is a typical case. A homeowner sees a stain on the ceiling below a flat section and assumes a patch will do. The inspection finds wet decking, so the estimate moves toward the upper end of the range. Call early, because a stain you catch sooner usually means less to fix.
How to get a written a flat roof estimate
One call starts it. Roofers Hotline answers 24 hours a day, takes down the address and the problem you are seeing, and books the inspection of your flat roof. After the inspection you receive a written estimate before any work starts, so you can read the price and the scope at your own pace.
It helps to have a few things ready: roughly how big the flat section is, where you see water or sagging, and whether you know how many layers are on the roof. If you do not know, say so. The inspection will find it.
Compare the written estimate with the ranges above, TPO at $6,800 to $23,800, EPDM at $6,800 to $22,100 and modified bitumen at $6,800 to $15,300, then ask about anything that sits far outside them. Call now to book your inspection.
- Call or request a quote. Call us or send the short form with your ZIP code, what the roof is doing and when you need it done. Calls are answered 24/7.
- Confirm the address. We confirm the address and the problem, and a local roofer calls you back to book the inspection.
- Written estimate, then the work. You get a written estimate before any work starts, and the work is scheduled when you say go. What happens at each step.
Costs
Flat roof cost in 2026
| Job | Range | Per unit |
|---|---|---|
| Flat roof, TPO membrane | $6,800–$23,800 | $400–$1,400 per square |
| Flat roof, EPDM rubber | $6,800–$22,100 | $400–$1,300 per square |
| Flat roof, modified bitumen | $6,800–$15,300 | $400–$900 per square |
Typical ranges for 2026 from published cost guides (sources below); a written estimate depends on pitch, layers and decking.
Not a quote: typical 2026 ranges from published cost guides and Census County Business Patterns 2022 payroll data; your written estimate depends on pitch, layers and decking.
Source: published 2026 cost guides (Fixr, This Old House).
Why call
Why Roofers Hotline for a flat roof
- One number for every roof problem Repairs, leaks, storm damage, replacement, inspections, gutters and skylights, all through (855) 512-1072.
- Calls answered 24 hours a day, 7 days a week The line is open around the clock because roofs fail at every hour.
- Written estimate before any work starts The scope and the price are written down before any work starts.
- Deductibles are never waived or rebated What the policy covers, what you pay, no games.
- You decide, on your schedule A written estimate is yours to compare at home.
Flat roof cost near you
Enter a ZIP code on Find roofers by ZIP code to find roofing help for your area.
Metro areas
- New York City, NY
- Edison, NJ
- Los Angeles, CA
- Boston, MA
- Washington, DC
- Minneapolis, MN
- Philadelphia, PA
- Anaheim, CA
- New Haven, CT
- Chicago, IL
- Pittsburgh, PA
- Houston, TX
- Seattle, WA
- Manchester, NH
- San Francisco, CA
- San Jose, CA
- Allentown, PA
- Worcester, MA
- Providence, RI
- Akron, OH
By state
- Alabama
- Alaska
- Arizona
- Arkansas
- California
- Colorado
- Connecticut
- Delaware
- Florida
- Georgia
- Hawaii
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana
- Maine
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Mississippi
- Missouri
- Montana
- Nebraska
- Nevada
- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- Rhode Island
- South Carolina
- South Dakota
- Tennessee
- Texas
- Utah
- Vermont
- Virginia
- Washington
- Washington, DC
- West Virginia
- Wisconsin
- Wyoming
Questions
Flat roof cost questions
What does flat roof cost in 2026?
By the 2026 cost table here, a tpo membrane flat replacement runs $6,800–$23,800, or $400–$1,400 per square. These are published ranges, not a quote: the written estimate for your roof depends on its size, pitch, layers and decking, so call to have it measured.
Is modified bitumen the cheapest flat roof option?
Among the three membranes in the 2026 guides, modified bitumen has the lowest top end: $6,800 to $15,300, or $400 to $900 per square. TPO runs $6,800 to $23,800 and EPDM $6,800 to $22,100, so the final price depends on your roof. Call for a written estimate that compares the options.
What should I have ready when I call about a flat roof?
Know where you see a leak, stain or pooling water, roughly how large the flat section is, and whether you know how many layers sit on the roof. Not knowing is fine, because the inspection checks it. Call, book the inspection, and get the written estimate before any work starts.
Across the metro areas served, the question that comes up most is How long does a roof last? Another question homeowners here ask is Does homeowners insurance cover roof replacement?, from across the metro areas served.
Get flat roof cost quotes
Takes about a minute. Tell us the ZIP code and what the roof is doing, and a local roofer calls you back to book an inspection and written estimate.
Start your requestOr call: the number at the top of this page is answered 24/7.