Flat Roof Replacement cost: Janesville vs Kenosha (2026)
In 2026, flat roof replacement is about 6% less expensive in Janesville than in Kenosha. Most homeowners pay around $10,050 in Janesville versus $10,700 in Kenosha — a gap of roughly $650.
Janesville WI
Lower costTypically around $10,050
Kenosha WI
Typically around $10,700
Janesville vs Kenosha: full breakdown
| Factor | Janesville | Kenosha |
|---|---|---|
| Typical 2026 cost | $10,050 | $10,700 |
| Estimated range | $5,150–$14,950 | $5,500–$15,900 |
| Labor index (vs US) | ×0.95 | ×1.01 |
| Climate zone | Cold | Cold |
| Climate factor | ×1.03 | ×1.03 |
| Local permit | $250 | $275 |
| Labor share | $6,050 | $6,400 |
| Materials/equipment | $4,000 | $4,300 |
These are 2026 planning figures for flat roof replacement, localized to each city — not formal quotes.
Is the gap worth worrying about?
6% 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: Janesville vs Kenosha
Below, each flat roof replacement option is priced independently for both cities, with identical local labor, climate and permit logic applied — so the comparison holds up.
| Type | Janesville | Kenosha |
|---|---|---|
| EPDM (rubber) | $5,150–$12,000 | $5,500–$12,800 |
| TPO | $6,150–$13,000 | $6,550–$13,850 |
| PVC | $7,100–$14,950 | $7,550–$15,900 |
| Modified bitumen | $5,150–$11,050 | $5,500–$11,750 |
| Built-up roofing (BUR) | $6,600–$14,000 | $7,050–$14,850 |
Flat roof replacement numbers here are 2026 planning ranges, adjusted per city — useful for budgeting, not a substitute for an actual quote.
Flat roof replacement by roof size: Janesville vs Kenosha
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 | Janesville | Kenosha |
|---|---|---|
| 1,000 sq ft (10 squares) | $4,150–$8,600 | $4,450–$9,150 |
| 1,500 sq ft (15 squares) | $5,150–$11,050 | $5,500–$11,750 |
| 2,000 sq ft (20 squares) | $6,150–$14,000 | $6,550–$14,850 |
| 2,500 sq ft (25 squares) | $7,600–$15,950 | $8,100–$16,950 |
| 3,000+ sq ft (30 squares) | $9,100–$18,900 | $9,650–$20,100 |
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
Shingles seal properly only in warm, dry conditions, which is exactly when everyone else wants a new roof too — especially right after a summer hailstorm. Lock in a late-fall or winter booking for a spring install and you skip that rush.
Where does a smart roofing budget go in 2026?
Before you compare roofing bids, know that the biggest variables are hidden: whether the crew tears off or lays over, what grade of shingle goes down, and what the decking looks like once it's exposed. Each one can shift the total well past the advertised price.
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
The surprise that wrecks a roofing budget is rot in the decking, and you rarely see it until the old shingles come off. Fix the price per replacement sheet in the contract before the crew starts, so a low bid can't quietly climb once the deck is open.
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.
Janesville vs Kenosha
Is flat roof replacement cheaper in Janesville or Kenosha?
Yes — Kenosha costs more. Expect around $10,700 for flat roof replacement there against $10,050 in Janesville, about $650 (6%) apart in 2026.
Why does flat roof replacement cost more in Kenosha than Janesville?
Kenosha's higher labor index (1.01 vs 0.95 in Janesville) is the biggest factor, with the cold/cold climate split and permit fee differences playing a smaller role.
How much is flat roof replacement in Janesville, WI?
Expect to pay $5,150 to $14,950 for flat roof replacement in Janesville in 2026, averaging around $10,050.
When is the cheapest time to buy flat roof replacement — and does it differ by city?
No, the seasonal pattern is the same in Janesville and Kenosha: book during Late spring to early fall (dry, 45–85°F) for about 5–10% in savings. Mid-winter and the post-storm rush is the priciest stretch in both cities, mostly due to emergency replacements.
Should I choose where to live based on flat roof replacement cost?
Not really — the $650 gap is one-time, and smart timing and tighter quotes in Kenosha can shrink it. Factors that compound over time, like energy prices and home condition, deserve more weight than a single upfront difference.
Compare flat roof replacement in other cities
Updated June 2026 · By Serhat Özçelik