Cook County property tax
Berwyn Township property tax appeal guide
Your township: Berwyn
Cook County Assessor
Window closed July 6, 2026 Official Cook County Assessor source ↗
Board of Review
Deadline: September 29, 2026 · 10 days remaining Official Board of Review source ↗
Berwyn Township: the Board of Review is accepting appeals through September 29, 2026.
File with the Cook County Board of Review · $0 filing fee ↗County calendar updated September 15, 2026.
Berwyn Township follows the same boundaries as the City of Berwyn. It was reassessed with the South Triad for 2026, with the next reassessment scheduled for 2029. Owners use separate annual Assessor and Board of Review processes; the Board of Review window is available every year, not only in a reassessment year.
Recent home sales in Berwyn Township
From July 13, 2024 through July 13, 2026, the comparison pool contains 781 recorded single-family sales.
- Median sale price: $345,000
- Median sale price per square foot: $224
- Median building size: 1,440 square feet
These are recorded single-family sales used as comparison evidence, not an estimate of any home's value.
Evidence to review
- Make sure the county record identifies the correct property class and number of units before using another property as evidence.
- When reviewing bungalow sales, compare above-grade building area, age, exterior construction, and lot dimensions rather than price alone.
- Separate ordinary market transfers from sales with facts that may make them poor evidence for your home.
- If deferred maintenance matters, organize photographs by room or building side and retain the date each image was taken.
Official sources
Cook County Assessor calendar · Cook County Board of Review appeals
You file directly with Cook County for free. We provide optional research, not representation or guaranteed savings.
Editorial guidance reviewed 2026-09-19. Filing dates are checked separately.