Flat Roof Replacement Cost in Green Bay 2026
Flat Roof Replacement in Green Bay costs between $5,413 and $18,042 in 2026, with the average around $9,923. Green Bay pricing runs 10% below the US national average. Removal of the existing membrane and installation of a new single-ply TPO or EPDM roof with insulation board and sealed seams. Includes edge metal and drain reflashing.
What flat roof replacement includes in Green Bay
Removal of the existing membrane and installation of a new single-ply TPO or EPDM roof with insulation board and sealed seams. Includes edge metal and drain reflashing.
Typical time on site: 2 to 3 days. Local labor rate: $21/hour for an experienced roofing pro.
What changes the price of flat roof replacement in Green Bay
- Membrane type TPO or EPDM
- Roof square footage
- Insulation thickness
- Drainage and ponding fixes
- Access and tear-off
A flat roof replacement quote priced off statewide averages will be off by 10 to 20 percent for Green Bay, because the metro has its own labor pool, material delivery distances, and permit timelines.
Green Bay climate and demand for roofing
Cold, snowy climate off Lake Michigan with heavy snow loads and deep frost, requiring below-frost foundations and snow-rated roof framing.
Green Bay permits for flat roof replacement
Building department: City of Green Bay Building Inspection Division (Dept. of Community & Economic Development). https://www.greenbaywi.gov/312/Building-Permits-Inspections
Typical permit cost: $100 - $2,000 residential. Inspection time: 7-15 business days. Green Bay rule: Like all Wisconsin, residential builders need the state DSPS Dwelling Contractor certification and registration; Green Bay uses separate short-form and long-form project permit applications depending on scope.
Wisconsin sales tax and licensing for Roofing
Wisconsin sales tax: 5% + 0.5% county (~5.4% combined avg). Real property labor exempt. County tax of 0.5% in most counties.
State license: Wisconsin Department of Safety and Professional Services (DSPS), required: Dwelling Contractor Certification $25 + Dwelling Contractor Qualifier $30.
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