Cook County property tax
Jefferson Township property tax appeal guide
Jefferson 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 Jefferson property freeJefferson Township follows Cook County's City Triad reassessment schedule: it was reassessed for 2024 and is next scheduled for 2027. The Cook County Assessor and Board of Review examine appeals independently under their own annual calendars. A Board of Review window opens for Jefferson each year, including the years between reassessments.
Recent home sales in Jefferson Township
From July 13, 2024 through July 13, 2026, the comparison pool contains 6,494 recorded single-family sales.
- Median sale price: $485,000
- Median sale price per square foot: $307
- Median building size: 1,567 square feet
These are recorded single-family sales used as comparison evidence, not an estimate of any home's value.
Evidence to review
- Begin within the subject's assessment neighborhood before considering sales from a wider part of Jefferson Township.
- Match bungalows, cottages, and other residences by actual type, above-grade area, age, and site characteristics.
- Check the Assessor's property details for additions, multiple cards, or classification issues that could distort a comparison.
- Use permits, contractor scopes, or dated photographs when they clarify a condition difference that sale records cannot show.
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.