Northfield Township property tax appeals: dates, odds, and a free comps check
Is your Northfield Township home assessed higher than similar homes nearby? Check in a minute, then file yourself for free.
Free. No sign-up. Compares your home with the 5 to 10 most similar homes nearby, from the Assessor's own data.
2026 appeal windows
The Assessor window has closed. The Board of Review opens this township later; check the Board's dates page or pre-register on its portal.
- Cook County Assessor notices mailed July 24, 2026; appeals due September 4, 2026. File at the Assessor
- Board of Review dates not announced yet. Leave your email on your result page and we'll tell you when they are. File at the Board
Dates copied from the Assessor's calendar and the Board's dates page on 2026-10-30. Confirm before filing. Add these dates to your calendar.
How Northfield homeowners did at the Board of Review (2025)
- Residential parcels
- 33,233
- Appealed to the Board
- 22,411 (67%)
- Filed on their own
- 1,942 (9%)
- Won a reduction, filing alone
- 71%
- Won a reduction, with an attorney
- 56%
- Average AV cut, filing alone
- $4,747
County-wide, homeowners filing alone won 57.6% of residential appeals versus 38.9% for attorney-filed ones. Computed 2026-11-03 from the Board of Review's decision data (classes 200-299, "won" = Board value below the Assessor's certified value). Averages include appeals that got no change. An assessed-value cut of $1,000 is roughly $242 to $424 a year off a suburban bill.
What to do
- Run the free check above. It compares your assessed value per square foot with similar homes in your assessment neighborhood.
- If yours looks high, get the evidence kit from the result page: the comps in the Board's format, recent sales, and a statement to paste into the form.
- File online at the office whose window is open. Filing is free at both. You type the complaint yourself; only you or an Illinois attorney can file for your home.
- Leave an email on the result page and we'll remind you a week and three days before the deadline.
New to this? Read how to appeal, step by step.