Window Replacement Cost in Illinois
Updated for 2025 • Climate Zone 5A • Labor costs 10% above national average
Low
$330
Average
$715
High
$1,320
per unit • 10% above national average
Window Replacement in Illinois: What You Need to Know
Illinois falls in Climate Zone 5A (Cool-Humid), which insulation value (u-factor) is the priority. Understanding these local factors helps you make better decisions about materials and timing.
U-Factor Critical
Low U-factor (0.25 or lower) essential. Triple pane worth considering.
Solar Gain Welcome
Higher SHGC on south windows captures free solar heat in winter.
Air Sealing
Quality installation prevents cold drafts. Biggest comfort impact.
✓ Recommended for Illinois
- • Triple Pane (or premium double)
- • U-Factor ≤0.25
- • Higher SHGC South
✗ Not Recommended
- • Single Pane
- • High U-Factor
- • Poor Installation
Best time for this project in Illinois: Spring - fall
Calculate Your Window Replacement Cost in Illinois
Estimate Your Window Replacement Cost
Your Estimated Cost
Low
$3,300
Average
$7,150
High
$13,200
Slightly above national average
Standard material
Estimates are for planning purposes. Actual costs vary by project specifics, contractor, and market conditions.