Flat Roof Replacement cost: Green Bay vs Madison (2026)
In 2026, flat roof replacement is about 3% less expensive in Green Bay than in Madison. Most homeowners pay around $10,000 in Green Bay versus $10,350 in Madison — a gap of roughly $350.
Green Bay WI
Lower costTypically around $10,000
Madison WI
Typically around $10,350
Green Bay vs Madison: full breakdown
| Factor | Green Bay | Madison |
|---|---|---|
| Typical 2026 cost | $10,000 | $10,350 |
| Estimated range | $5,100–$14,850 | $5,300–$15,350 |
| Labor index (vs US) | ×0.95 | ×0.98 |
| Climate zone | Cold | Cold |
| Climate factor | ×1.03 | ×1.03 |
| Local permit | $250 | $275 |
| Labor share | $6,000 | $6,200 |
| Materials/equipment | $4,000 | $4,150 |
All figures are 2026 localized planning estimates for flat roof replacement — get an actual quote before you commit.
Is the price difference a dealbreaker?
3% is within noise for flat roof replacement — contractor selection and timing move the price more than which of these two metros you're in.
Flat roof replacement by type: Green Bay vs Madison
Every flat roof replacement type gets its own localized price for each metro, using the same labor, climate and permit adjustments — a true apples-to-apples comparison.
| Type | Green Bay | Madison |
|---|---|---|
| EPDM (rubber) | $5,100–$11,950 | $5,300–$12,350 |
| TPO | $6,100–$12,900 | $6,300–$13,350 |
| PVC | $7,050–$14,850 | $7,300–$15,350 |
| Modified bitumen | $5,100–$10,950 | $5,300–$11,350 |
| Built-up roofing (BUR) | $6,600–$13,900 | $6,800–$14,350 |
Treat these as 2026 localized estimates for flat roof replacement, not quotes from a contractor.
Flat roof replacement by roof size: Green Bay vs Madison
Flat and low-slope roofs are priced per square (100 sq ft) and run about $3–$11 per sq ft installed, depending on the membrane. The roof area is close to the footprint since there's little pitch.
| Size | Green Bay | Madison |
|---|---|---|
| 1,000 sq ft (10 squares) | $4,150–$8,550 | $4,300–$8,800 |
| 1,500 sq ft (15 squares) | $5,100–$10,950 | $5,300–$11,350 |
| 2,000 sq ft (20 squares) | $6,100–$13,900 | $6,300–$14,350 |
| 2,500 sq ft (25 squares) | $7,550–$15,850 | $7,800–$16,350 |
| 3,000+ sq ft (30 squares) | $9,000–$18,750 | $9,300–$19,400 |
Localized 2026 planning estimates — not quotes. Each city adjusts the national flat roof replacement range for local labor, climate and permits.
Cheapest time for flat roof replacement in either city
Roofers are slammed the moment warm weather returns, especially after storms. Get on their books in the off-season for a spring job and you're negotiating with an empty calendar, not a waiting list.
Where does a smart roofing budget go in 2026?
Tear-off vs. overlay, shingle tier and what's hidden under the deck decide the real number. Our editors on the trade-offs.
The value case
Architectural shingles hit the sweet spot — far more durable than 3-tab for a modest premium, and far cheaper than metal or tile. For most homes they're the right default.
The do-it-right case
Pay for a full tear-off and quality underlayment, flashing and ventilation. An overlay saves money today but traps heat, voids some warranties and costs more at the next replacement.
The risk case
Budget for the unknown: rotten decking found at tear-off is the most common surprise. Get the per-sheet repair rate in writing up front so a "cheap" bid doesn't balloon mid-job.
Full tear-off, architectural shingles and a written deck-repair rate protect you from the two big risks — hidden rot and warranty gaps. The lowest storm-season bid is rarely the cheapest over the roof's life.
Green Bay vs Madison
Is flat roof replacement cheaper in Green Bay or Madison?
Green Bay comes out ahead here, at roughly $10,000 for flat roof replacement compared with $10,350 in Madison — a 3% ($350) gap as of 2026.
Why does flat roof replacement cost more in Madison than Green Bay?
Labor rates explain most of it — 0.98 in Madison vs 0.95 in Green Bay. A cold climate versus cold, along with differing permit costs, accounts for the rest.
How much is flat roof replacement in Green Bay, WI?
Green Bay homeowners can expect $5,100 to $14,850 for flat roof replacement in 2026, with $10,000 the typical number.
When is the cheapest time to buy flat roof replacement — and does it differ by city?
It doesn't vary by location — Late spring to early fall (dry, 45–85°F) is the discount window in both Green Bay and Madison (roughly 5–10% off), while mid-winter and the post-storm rush tends to be the most expensive in either city.
Should I choose where to live based on flat roof replacement cost?
That would be a stretch. $350 is a one-time difference, not an ongoing one, and off-season buying plus apples-to-apples bids in Madison can close a good chunk of it. What matters more long-term is energy costs, climate and the condition of the home.
Compare flat roof replacement in other cities
Updated June 2026 · By Serhat Özçelik