McLean County property tax appeal 2027: deadline, forms and how to file
To appeal a McLean County assessment, file with the McLean County Board of Review online at mcleanil.seamlessdocs.com, 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.
Assessments are published township by township in local newspapers; for 2026 the county posted publication dates from August 26 (e.g. Allin, Arrowsmith, Dale) through September 29 (Bloomington, City of Bloomington, Downs, Old Town), with filing deadlines September 25 through October 29, 2026.
Data as of 20 Oct 2026 · McLean 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 McLean County
- Step 1
File the appeal
Online at mcleanil.seamlessdocs.com with the account number on your notice, or by mailing Form PTAX-230. State the grounds the county recognises.
- 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 McLean 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 |
|---|---|---|---|
| PTAX-230 Non-Farm Property Assessment Complaint (McLean County online form) | PTAX-230 | Complaint for non-farm property; can be completed online or printed | Online |
| PTAX-227 Farm Property Assessment Complaint (McLean County online form) | PTAX-227 | Complaint for farm property; can be completed online or printed | Online |
| 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 | McLean 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 McLean 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.
McLean County questions
When is the McLean County appeal deadline for 2027?
No 2027 date is published yet. The board’s rule: A property owner has 30 days after the publication date shown for their township to file; the county posts each township's publication date, newspaper and filing deadline on its Filing an Assessment Complaint page, and complaints filed late are not heard. Electronic submissions (online form or email) are dated as of the date received; mailed appeals need an official USPS postmark (metered-mail dates are not accepted) or a private carrier receipt; faxes are not accepted. The appeal form and supporting evidence are both required at filing; an appraisal not filed with the complaint may be accepted if received within 14 calendar days of the deadline for residential property (30 for commercial).
How do I appeal my assessment in McLean County?
File online at mcleanil.seamlessdocs.com, or file the PTAX-230 Non-Farm Property Assessment Complaint (McLean County online form) with the McLean County Board of Review, P.O. Box 2400, Bloomington, IL 61702-2400 (office: 115 E. Washington St., Room 101, Bloomington, IL 61701).
Should I talk to the assessor first?
Yes. The township assessor or the McLean County Supervisor of Assessments can fix record errors informally. Still file with the McLean 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 McLean County Supervisor of Assessments (Assessor)?
Mail: McLean County Board of Review, P.O. Box 2400, Bloomington, IL 61702-2400 (office: 115 E. Washington St., Room 101, Bloomington, IL 61701). Phone: 309-888-5132. Hours and walk-in details: mcleancountyil.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
De Witt County · Woodford County · Livingston County · Ford County · Tazewell County · Piatt County · Logan County
- McLean County Filing an Assessment Complaint (2026 township deadlines)
- McLean County Board of Review page
- McLean County Assessor (Supervisor of Assessments) page
- 2026 Rules of the McLean County Board of Review (PDF)
- McLean County Guidelines for Assessment Complaints (PDF)
- McLean County PTAX-230 online complaint form
- McLean County PTAX-227 online complaint form
- Illinois State Board of Elections County Officers directory
- 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).