Window Replacement Cost in Illinois (2027)
Data updated November 13, 2026
We have no permits from Illinois yet, so this is an estimate: the reference range from the cities we cover, adjusted by a state cost factor.
Your windows, your ZIP
Illinois · state estimate
Estimated range · Illinois
996 permits
$12,100
$1,729 / window7 windows
- Low
- $8,242
- High
- $25,872
- Typical
- $12,100
- median
- Low
- $8,242
- 25th percentile
- High
- $25,872
- 75th percentile
Estimated for Illinois.
Nearest cities with permit data
We have no permits from Illinois yet. The estimate above adjusts the reference range by a state labor-cost factor; these are the measured cities closest to Illinois.
Baton Rouge, LA
about 670 miles away · 43 permits · Jan 2025 – Nov 2026
$1,500/ window
$1,179 – $1,773
Seattle, WA
about 1,720 miles away · 99 permits · Jan 2025 – Nov 2026
$1,637/ window
$1,214 – $2,347
San Francisco, CA
about 1,780 miles away · 854 permits · Jan 2025 – Nov 2026
$1,717/ window
$1,115 – $3,500
All figures by city
- Baton Rouge, LAPer window
- Low (25th percentile)
- $1,179
- Typical (median)
- $1,500/ window
- High (75th percentile)
- $1,773
43 permits · Jan 2025 – Nov 2026
- Orlando, FLTotal project cost
- Low (25th percentile)
- $4,500
- Typical (median)
- $10,000
- High (75th percentile)
- $15,581
238 permits · Jan 2025 – Nov 2026
- San Francisco, CAPer window
- Low (25th percentile)
- $1,115
- Typical (median)
- $1,717/ window
- High (75th percentile)
- $3,500
854 permits · Jan 2025 – Nov 2026
- Seattle, WAPer window
- Low (25th percentile)
- $1,214
- Typical (median)
- $1,637/ window
- High (75th percentile)
- $2,347
99 permits · Jan 2025 – Nov 2026
Low / Typical / High are the 25th, 50th and 75th percentile of the declared permit value. Cities with fewer than 20 permits are not published.
What changes the price
Location
the median ranged from $1,500 / window in Baton Rouge, LA to $1,717 / window in San Francisco, CA.
Project scope
the high end of the range is more than double the low end, so size, access, tear-off of old material and finish level matter as much as location.
Questions
How much does a window replacement cost in Illinois?
The typical (median) cost is $1,729 / window. Half of projects fall between $1,177 / window and $3,696 / window, based on 996 building permits in Baton Rouge, LA, San Francisco, CA and Seattle, WA.
How many windows do homeowners usually replace at once?
In Baton Rouge, LA, the median permit covered 9 windows; In Chicago, IL, the median permit covered 6 windows; In San Francisco, CA, the median permit covered 5 windows; In Seattle, WA, the median permit covered 7 windows. That is why the calculator starts at 7 windows.
Where do these numbers come from?
From building permits that U.S. cities publish on their open-data portals. Each permit includes the project cost declared by the applicant. We filter residential projects of this type and report the 25th percentile, median and 75th percentile.
Why might my quote be higher than these figures?
Permit applicants declare the cost themselves and some understate it. Permits also exclude work that does not need one. Treat the high figure as a realistic ceiling for an average project, not a maximum.
About this figure
- Source
- Residential building-permit records published by Baton Rouge, LA, Orlando, FL, San Francisco, CA and Seattle, WA
- Period
- Jan 2025 – Nov 2026 · 1,234 permits
- Method
- 25th / 50th / 75th percentile of the declared project value. Full methodology
- Updated
- November 13, 2026