Property tax appeal · Illinois
Appeal your property taxes in Illinois.
In Illinois, the township or county assessor sets your value and the county Board of Review (then PTAB) hears your case. Boards act on evidence of market value as of the assessment date, and a licensed, USPAP-compliant appraisal is that evidence.
$5, credited toward your appraisal.
Illinois
14 county pages below
- Values your home
- Township or county assessor
- Hears your case
- County Board of Review (then PTAB)
- Desktop appraisal
- $225
- $5 check credited
- Timing
- Confirmed with your order
Deadline
Windows open township-by-township as assessment notices publish — typically 30 days from publication. Cook County runs its own per-township calendar.
Confirm your filing window and recipient requirements before ordering. Service availability and delivery depend on the property, evidence and appraiser. You remain responsible for filing on time.
How it works
How to appeal your property taxes in Illinois.
- Step 1
Check your savings
Enter your address and pay $5. We check your Illinois assessment against recent nearby sales.
- Step 2
Order the appraisal
A desktop appraisal valued as of your assessment date, with the $5 credited. Complex homes get one exact quote.
- Step 3
Show us your home
Walk through on your phone so the appraiser sees its condition. A desktop appraisal needs no visit.
- Step 4
File your appeal
A state-licensed IL appraiser signs it, with a cover letter and filing steps. You file by your deadline, and the county Board of Review (then PTAB) hears your case.
The evidence
Boards act on value, not frustration.
However Illinois labels the process, the case underneath is the same: show what your home was actually worth on the assessment date. A licensed, USPAP-compliant appraisal, with comparable sales, documented adjustments and a signed opinion of value, is that showing.
What the appraisal gives you
- Valued as of your assessment date, not today
- Comparable sales with adjustments and citations
- Signed by a state-licensed IL appraiser
- A phone walkthrough; a desktop appraisal needs no visit
Confirm before you file
- Your filing deadline, from your assessment notice
- Appraiser availability and delivery timing, before you order
The process
How Illinois handles appeals.
Illinois assesses on a cycle — Cook County reassesses each township every three years; most other counties run quadrennial cycles with annual updates. When your township’s notices publish, a roughly 30-day appeal window opens: first with the assessor (in Cook, the Assessor’s Office accepts appeals directly), then the county Board of Review, and if needed the state Property Tax Appeal Board (PTAB) or circuit court. Effective tax rates in Illinois are among the highest in the nation, so even a modest assessment cut compounds into real money.
Worth knowing in Illinois
Illinois assessments are a fraction of market value (one-third outside Cook; Cook residential is assessed at 10% of market value before equalization) — your appeal still comes down to demonstrating what the home is actually worth, which the assessor then converts to assessed value.
FAQ
Illinois questions
When can I appeal my property taxes in Illinois?
When your township’s assessment notices publish — each township gets its own ~30-day window. Watch your notice or your county’s published schedule; Cook County posts a per-township calendar every year.
Cook County appeal vs. Board of Review — what’s the difference?
In Cook you can appeal first to the Assessor’s Office, then again to the Board of Review in the same year. Many homeowners file both; the evidence — comparable sales supporting a lower market value — is the same.
