Kankakee County property tax appeal 2027: deadline, forms and how to file
To appeal a Kankakee County assessment, file with the Kankakee County Board of Review by mail or in person; in Illinois the deadline is 30 days after the township assessment list is published (Cook County uses township filing windows). Confirm the exact date on your notice or with the assessor; we add each county's 2027 date here when it is published.
Assessments are published by township in the Daily Journal (and the Herscher Pilot for Salina and Pilot townships); in 2026 publication was September 9-10, 2026 with a final appeal date of October 13, 2026. The 2027 schedule is not yet published.
Data as of 20 Oct 2026 · Kankakee County Board of ReviewCheck your own assessment
Free. We compare the value on your notice with recent sales of similar homes nearby and tell you whether an appeal is worth filing. Have your assessment notice and tax bill handy.
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How to file in Kankakee County
- Step 1
File the appeal
Use the method your notice lists, by the deadline on the notice.
- Step 2 · before the hearing
Prepare and submit your evidence
Overvaluation must be shown by a preponderance of the evidence; a uniformity (equity) claim needs clear and convincing evidence. The strongest evidence is a recent arm’s-length purchase of your home, or an appraisal as of January 1. Otherwise use at least three comparable sales, or for equity at least three similar nearby homes with their assessments and property record cards, in a grid. Bring a photo of your home and its property record card.
- Step 3
Meet, then hear
An informal review with Township assessor or Supervisor of Assessments comes first; if you decline the offer, the Kankakee County Board of Review hears the case. Most reductions happen at the first step.
Before you file: how to read your notice · evidence that works · informal vs formal hearing · when not to appeal
Forms
| Form | Number | Use | Format |
|---|---|---|---|
| 2026 Kankakee County Board of Review Assessment Complaint | — | Required assessment complaint form; a separate complaint is required for each parcel | |
| Residential Appeal (Property Tax Appeal Board) | PTAB-1A | Only after the Board of Review decides: the state appeal, due 30 days after the board’s written notice. Can also be filed online through PTAB eFile. | Fillable PDF |
Appeal levels
| Level | Who hears it | Deadline | Cost |
|---|---|---|---|
| Informal review | Township assessor or Supervisor of Assessments | Before the Board of Review deadline | Free |
| Board of Review | Kankakee County Board of Review | 30 days after the assessment list is published | Free |
| Property Tax Appeal Board | Illinois Property Tax Appeal Board (state) | 30 days after the Board of Review’s written decision | No filing fee |
| Court | Circuit court (administrative review), or a tax objection in Kankakee County circuit court | 35 days after the PTAB decision; tax objections follow the tax-bill penalty date | Court costs |
What evidence the board accepts
Overvaluation must be shown by a preponderance of the evidence; a uniformity (equity) claim needs clear and convincing evidence. The strongest evidence is a recent arm’s-length purchase of your home, or an appraisal as of January 1. Otherwise use at least three comparable sales, or for equity at least three similar nearby homes with their assessments and property record cards, in a grid. Bring a photo of your home and its property record card.
Kankakee County questions
When is the Kankakee County appeal deadline for 2027?
No 2027 date is published yet. The board’s rule: The Board begins accepting complaints after publication; all appeals must be filed on or before 30 days after the township's publication date (35 ILCS 200/16-55). The Board posts a 'Publication and Appeal Deadline Dates' table by township each year (2026: final appeal date October 13, 2026 for all townships). Mailed complaints count as filed on the postmark date (the taxpayer is responsible for a correct postmark; courier delivery counts on receipt); fax and e-mail complaints are not accepted.
How do I appeal my assessment in Kankakee County?
File the 2026 Kankakee County Board of Review Assessment Complaint with the Kankakee County Board of Review, 189 East Court Street, 1st Floor, Kankakee, IL 60901. Mailed complaints count as filed on the postmark date.
Should I talk to the assessor first?
Yes. The township assessor or the Kankakee County Supervisor of Assessments can fix record errors informally. Still file with the Kankakee County Board of Review by the deadline: a board complaint is required before any state appeal.
What evidence works best?
A recent arm’s-length purchase of your home or an appraisal as of January 1. Otherwise, at least three comparable sales, or three similar nearby homes with lower assessments, with property record cards and photos.
How do I contact the Kankakee County Supervisor of Assessments?
Mail: Kankakee County Board of Review, 189 East Court Street, 1st Floor, Kankakee, IL 60901. Phone: 815-937-2945. Hours and walk-in details: k3county.net.
What if the Board of Review says no?
Appeal to the Illinois Property Tax Appeal Board within 30 days of the board’s written decision. There is no fee, and you can file online through PTAB eFile. A lowered value on an owner-occupied home carries over for the rest of the assessment period.
Check whether yours is over-assessed
Nearby counties
Will County · Iroquois County · Grundy County · Livingston County · Ford County · Kendall County · DuPage County
- Kankakee County Board of Review
- Kankakee County Supervisor of Assessments Office
- 2026 Board of Review Rules and Procedures (PDF)
- 2026 Assessment Appeal Form (PDF)
- 2026 Publication and Appeal Deadline Dates (PDF)
- 35 ILCS 200/16-55 — Board of Review complaints
- 35 ILCS 200/12-10 — Publication of assessments
- 35 ILCS 200/16-160 — Appeal to the Property Tax Appeal Board
- Illinois DOR — Assessment Appeals
- Property Tax Appeal Board — Filing your appeal
- Property Tax Appeal Board — FAQ
- U.S. Census Bureau, county population estimates (2024) and county gazetteer (2024).