Champaign County property tax appeal 2027: deadline, forms and how to file
To appeal a Champaign County assessment, file with the Champaign County Board of Review by mail, by email 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.
The Chief County Assessment Officer publishes the annual assessment roll by township beginning in mid-summer and continuing until all townships are published (2026 Board of Review Rules). The 2026 publications were posted in two township groups on the Assessment Office's Taxpayer Resources page.
Data as of 20 Oct 2026 · Champaign 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.
By checking an address you agree to the Terms and Privacy Policy. We keep an address only if you add it to a dashboard; we never sell it.
How to file in Champaign 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 Champaign 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 |
|---|---|---|---|
| Residential Real Estate Assessment Complaint Form (Tax Year 2026) | — | Required complaint form for residential appeals; page 3 comparison grid required for uniformity or sales-comparison appeals | |
| Commercial Complaint Form (Tax Year 2026) | — | Complaint form for commercial property appeals | |
| Comparable Data Sheet (2026) | — | Supporting comparable-property data sheet | |
| 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 | Champaign 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 Champaign 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.
Champaign County questions
When is the Champaign County appeal deadline for 2027?
No 2027 date is published yet. The board’s rule: Under the 2026 Board of Review rules, complaints are accepted July 1 through September 10 (2026), and must be filed on or before 30 days after publication of the township's assessments or by September 10, whichever is later. Filing is by hand delivery (Monday-Thursday 8:00 a.m.-4:30 p.m.), by U.S. mail with a postmark in the window, or by e-mailed PDF accompanied by 2 hard copies hand-delivered or postmarked by the deadline. Fax is not accepted. Complaints received after the deadline are returned unconsidered. Rules are re-adopted each June, so 2027 dates are not yet published.
How do I appeal my assessment in Champaign County?
File the Residential Real Estate Assessment Complaint Form (Tax Year 2026) with the Champaign County Board of Review, Scott M. Bennett Administrative Center, 102 East Main Street, Urbana, IL 61801. Mailed complaints count as filed on the postmark date.
Should I talk to the assessor first?
Yes. The township assessor or the Champaign County Supervisor of Assessments can fix record errors informally. Still file with the Champaign 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 Champaign County Assessment Office (Chief County Assessment Officer / Supervisor of Assessments)?
Mail: Champaign County Board of Review, Scott M. Bennett Administrative Center, 102 East Main Street, Urbana, IL 61801. Phone: 217-384-3758. Hours and walk-in details: champaigncountyil.gov.
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
Piatt County · Vermilion County · Douglas County · Ford County · De Witt County · Edgar County · Moultrie County
- Champaign County Board of Review
- Champaign County Board of Review Forms for Public
- 2026 Champaign County Board of Review Rules (PDF)
- Residential Complaint Form Tax Year 2026 (PDF)
- Champaign County Assessment Office
- Champaign County Assessment Office Taxpayer Resources
- 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).