Asphalt Shingle Roof Replacement cost: Decatur vs Rockford (2026)
The two metros aren't quite in sync on asphalt shingle roof replacement: Decatur sits 3% below Rockford, or roughly $8,800 versus $9,050 — about $250 apart.
Decatur IL
Lower costTypically around $8,800
Rockford IL
Typically around $9,050
Decatur vs Rockford: full breakdown
| Factor | Decatur | Rockford |
|---|---|---|
| Typical 2026 cost | $8,800 | $9,050 |
| Estimated range | $5,750–$11,850 | $5,900–$12,150 |
| Labor index (vs US) | ×0.92 | ×0.95 |
| Climate zone | Cold | Cold |
| Climate factor | ×1.05 | ×1.05 |
| Local permit | $250 | $250 |
| Labor share | $5,300 | $5,450 |
| Materials/equipment | $3,500 | $3,600 |
These are 2026 planning figures for asphalt shingle roof replacement, localized to each city — not formal quotes.
How much should this gap actually matter?
At 3%, this gap is small enough that it's usually swallowed by normal quote-to-quote variation for asphalt shingle roof replacement — focus on the contractor, not the city.
Asphalt shingle roof replacement by type: Decatur vs Rockford
We localize each asphalt shingle roof replacement type separately for both metros, applying the same labor, climate and permit adjustments each time, so you're comparing like for like.
| Type | Decatur | Rockford |
|---|---|---|
| 3-tab shingles | $5,750–$9,950 | $5,900–$10,200 |
| Architectural shingles | $7,050–$11,850 | $7,200–$12,150 |
Treat these as 2026 localized estimates for asphalt shingle roof replacement, not quotes from a contractor.
Asphalt shingle roof replacement by roof size: Decatur vs Rockford
Roofing is priced per 'square' (100 sq ft of roof). A roof is bigger than the home's footprint because of pitch and overhangs — a 2,000 sq ft home often has a 2,200–2,600 sq ft roof. Asphalt runs about $3–$5 per sq ft installed.
| Size | Decatur | Rockford |
|---|---|---|
| 1,000 sq ft (10 squares) | $3,950–$7,050 | $4,000–$7,200 |
| 1,500 sq ft (15 squares) | $5,100–$9,450 | $5,200–$9,700 |
| 2,000 sq ft (20 squares) | $5,750–$11,850 | $5,900–$12,150 |
| 2,500 sq ft (25 squares) | $7,500–$13,800 | $7,700–$14,150 |
| 3,000 sq ft (30 squares) | $8,950–$16,700 | $9,200–$17,150 |
| 3,500+ sq ft (35 squares) | $10,400–$19,600 | $10,700–$20,100 |
Asphalt shingle roof replacement numbers here are 2026 planning ranges, adjusted per city — useful for budgeting, not a substitute for an actual quote.
Cheapest time for asphalt shingle 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?
The real cost of a roof comes down to three decisions: tear-off or overlay, which shingle tier, and what condition the decking is in. Our editors weigh in.
The do-it-right case
A full tear-off lets the crew replace underlayment, flashing and ventilation while the deck is exposed — the layers that actually keep water out. Covering old shingles with new ones costs less on install day, but the trapped heat shortens shingle life, and many manufacturers won't honor a warranty on an overlay.
The value case
Architectural shingles sit between bargain 3-tab and premium metal or tile, and for most houses that middle ground is exactly right. They carry longer wind and wear ratings than 3-tab for a small step up in price, without the four-figure jump metal or tile demands.
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.
Three habits keep a roof from costing more than it should: strip to the deck, choose an architectural shingle, and get the decking-repair rate on paper before the tear-off begins. Storm season tends to produce the lowest bids and the shortest-lived roofs.
Decatur vs Rockford
Is asphalt shingle roof replacement cheaper in Decatur or Rockford?
In 2026, asphalt shingle roof replacement is cheaper in Decatur at about $8,800, versus $9,050 in Rockford — a difference of about $250 (3%).
Why does asphalt shingle roof replacement cost more in Rockford than Decatur?
The main driver is local labor rates: Rockford's labor index is 0.95 versus 0.92 in Decatur. Climate zone (cold vs cold) also shift the total.
How much is asphalt shingle roof replacement in Decatur, IL?
Expect to pay $5,750 to $11,850 for asphalt shingle roof replacement in Decatur in 2026, averaging around $8,800.
When is the cheapest time to buy asphalt shingle 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 Decatur and Rockford (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 asphalt shingle roof replacement cost?
Probably not. Yes, $250 is a real gap, but it's a one-time cost you can partly offset in Rockford with off-season timing and tighter bids. Long-term factors like energy prices and home condition matter more than this one number.
Compare asphalt shingle roof replacement in other cities
Updated June 2026 · By Serhat Özçelik