Wood & Fiberglass Window Replacement cost in Illinois (2026)
Across Illinois, wood and fiberglass window replacement varies by your city's labor rates, climate and permit fees. Select your city below for a localized estimate.
wood and fiberglass window replacement typically falls in this range across 52 Illinois cities — your exact estimate depends on local rates.
| Largest cities in Illinois | Typical 2026 range |
|---|---|
| Chicago, IL | $11,800 – $29,350 |
| Aurora, IL | $11,800 – $29,350 |
| Rockford, IL | $10,000 – $24,800 |
| Joliet, IL | $11,800 – $29,350 |
| Naperville, IL | $11,800 – $29,350 |
| Springfield, IL | $9,950 – $24,650 |
| Peoria, IL | $9,950 – $24,650 |
| Elgin, IL | $11,800 – $29,350 |
| Waukegan, IL | $11,800 – $29,350 |
| Cicero, IL | $11,800 – $29,350 |
| Champaign, IL | $10,000 – $24,800 |
| Bloomington, IL | $10,100 – $25,100 |
| Arlington Heights, IL | $11,800 – $29,350 |
| Evanston, IL | $11,800 – $29,350 |
| Schaumburg, IL | $11,800 – $29,350 |
| Decatur, IL | $9,750 – $24,250 |
| Bolingbrook, IL | $11,800 – $29,350 |
| Palatine, IL | $11,800 – $29,350 |
| Skokie, IL | $11,800 – $29,350 |
| Des Plaines, IL | $11,800 – $29,350 |
| Orland Park, IL | $11,800 – $29,350 |
| Tinley Park, IL | $11,800 – $29,350 |
| Oak Lawn, IL | $11,800 – $29,350 |
| Berwyn, IL | $11,800 – $29,350 |
| Mount Prospect, IL | $11,800 – $29,350 |
| Normal, IL | $10,100 – $25,100 |
| Wheaton, IL | $11,800 – $29,350 |
| Hoffman Estates, IL | $11,800 – $29,350 |
| Oak Park, IL | $11,800 – $29,350 |
| Downers Grove, IL | $11,800 – $29,350 |
Showing the 30 largest cities of 52 in Illinois. Every Illinois city is covered — open any city above to see nearby Illinois cities too.
Wood & Fiberglass Window Replacement cost by type in Illinois
Typical 2026 ranges, localized to Illinois labor, climate and permits.
| Type | Illinois 2026 range |
|---|---|
| Fiberglass | $11,800 – $25,850 |
| Composite | $13,000 – $27,000 |
| Aluminum-clad wood | $15,300 – $31,700 |
| Solid wood | $16,500 – $35,200 |
Cheapest time for wood and fiberglass window replacement in Illinois
Window installers slow down in cold months and manufacturers run their deepest promotions in fall and winter, so off-season buyers catch both labor discounts and rebates.
Climate-zone spec
What window rating you need in Illinois
Illinois sits in a cold climate — the Northern ENERGY STAR window zone. To qualify for ENERGY STAR (v7.0), replacement windows here should meet:
In cold climates, a low U-factor (insulating value) matters most — it cuts heat loss and heating bills. A modest solar heat gain (SHGC) is even helpful for passive winter warmth.
Thresholds from ENERGY STAR Residential Windows v7.0. Costadia groups cities into cold / mixed / hot bands — for your exact county's zone, use the ENERGY STAR Climate Zone Finder. Source.
Rebates & incentives
The federal window tax credit is gone for 2026, but ENERGY STAR windows can still earn utility rebates in some areas — and the real long-run savings come from lower heating and cooling bills.
- The federal 25C tax credit (up to $600/yr for ENERGY STAR Most Efficient windows) ended December 31, 2025 under the One Big Beautiful Bill Act — not available for 2026.
- Some utilities still rebate high-efficiency windows — real examples include Mass Save (~$75/window on single-pane replacements) and Puget Sound Energy (up to $100/window, more for income-qualified, through 2026).
- There is no federal HEAR rebate for windows (that program targets electrification equipment like heat pumps), so utility and state programs are the path — check the DSIRE database.
- The durable savings are on your energy bills: right-rated windows for your climate zone cut heating/cooling costs every year (see the climate-zone spec above).
Verified July 2026. Program budgets and windows change fast — confirm current amounts and eligibility with your utility and the DSIRE database. Costadia does not administer these programs.
Wood & Fiberglass Window Replacement in Illinois
How much does wood and fiberglass window replacement cost in Illinois?
Across Illinois, wood and fiberglass window replacement typically runs $9,750–$29,350 in 2026, depending on your city's labor rates, climate and permit fees. Decatur is the most affordable (around $17,000) and Calumet City the most expensive (around $20,600).
Which Illinois city is cheapest for wood and fiberglass window replacement?
Decatur has the lowest typical wood and fiberglass window replacement cost in Illinois at about $17,000, while Calumet City is the highest at about $20,600 — a gap driven mostly by local labor rates.
How do other Windows options compare in Illinois?
In Chicago, Illinois's largest market, wood and fiberglass window replacement typically runs $11,800–$29,350. For comparison, vinyl window replacement runs $5,950–$17,650. Each option has its own Illinois cost guide with city-by-city pricing.
Why does wood and fiberglass window replacement cost vary across Illinois?
The three levers are local labor rates, climate zone and permit fees. In this cold-climate region, energy-efficient windows (double or triple pane, low-E) cut significant heat loss, and the upfront cost of wood and fiberglass window replacement pays back through lower heating bills. Prioritise double or triple pane with a strong low-E coating for the fastest payback.
When is the cheapest time to replace in Illinois?
The best window is late fall and winter, when demand drops and installers discount to keep crews busy — typically 5–15% off peak pricing. The priciest time is an emergency job during spring and summer peak.
Does Illinois require a permit for wood and fiberglass window replacement?
Most Illinois cities require a permit for wood and fiberglass window replacement; it typically adds around $125 and is already included in the estimates above.
Other Windows projects in Illinois
Weighing your options? Typical 2026 ranges below are localized to Chicago, Illinois's largest market — open any project for the full statewide breakdown.