Cook County property tax
Oak Park Township property tax appeal guide
Oak Park Township filing window
Next window: the Assessor and Board of Review each open once a year; check your property now so you're ready.
Check your Oak Park property freeOak Park Township has the same boundaries as the Village of Oak Park. This South Triad township was reassessed for 2026 and is next scheduled for reassessment in 2029. The Cook County Assessor and Board of Review use separate annual appeal windows, and the Board of Review window opens every year, including non-reassessment years.
Recent home sales in Oak Park Township
From July 13, 2024 through July 13, 2026, the comparison pool contains 814 recorded single-family sales.
- Median sale price: $625,000
- Median sale price per square foot: $331
- Median building size: 1,921 square feet
These are recorded single-family sales used as comparison evidence, not an estimate of any home's value.
Evidence to review
- Read the Assessor's property card first, especially its building area, construction year, class, and count of residential structures.
- For frame, brick, and stucco homes of similar age, check whether additions or finished space make an apparent comparison less alike.
- Give the most weight to recent recorded sales in the same assessment neighborhood with comparable lots and building styles.
- Pair dated condition photographs with estimates or inspection notes when the public record does not describe a material defect.
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.