Price per unit
US average
$450–$1,500
In Illinois
$450–$1,500
per window installed
Typical project
10 replacement windows — $4,500–$15,000
What's included
- Window unit
- Removal of old window
- Flashing and sealing
- Interior/exterior trim
What drives the cost
- Frame material (vinyl vs wood)
- Glass (double vs triple pane)
- Custom sizes / shapes
- Full-frame vs insert
Get an exact Illinois quote in 3 minutes
These are local averages. For a precise number, use the free calculator — it auto-adjusts pricing to your ZIP code.
Frequently asked questions
How much does window replacement cost in Illinois?
In Illinois, expect $450 to $1,500 per window installed in 2026, depending on materials, scope, and access.
Why is the price different in Illinois?
Illinois labor and material costs differ from the national average, so the same job costs more or less here than elsewhere. Our calculator adjusts automatically by location.
How do I get an accurate quote?
Measure the area, then use the free ConstruMate calculator — it itemizes material and labor at local rates and produces a professional estimate in minutes.