Property Tax Appeals · Illinois
Appeal your property taxes
in Illinois.
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.
Windows open township-by-township as assessment notices publish — typically 30 days from publication. Cook County runs its own per-township calendar.
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.
The evidence
Boards act on value,
not frustration.
However Illinois labels the process, the case underneath is identical: show what your home was actually worth on the assessment date. A licensed, USPAP-compliant appraisal — comparable sales, documented adjustments, a signed opinion of value — is that showing. Start with the $5 check to see if the numbers are on your side before you spend real money.
- Valued as of your assessment date — not today
- Comparable sales with adjustments and citations
- Signed by a state-licensed IL appraiser
- Phone walkthrough — no stranger in your home
- Delivered in 48–72 hours, rush available
Illinois counties
Illinois questions
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.
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.
We’re not an AVM, a computer model, or a real-estate agent estimate. Every report is prepared under the Uniform Standards of Professional Appraisal Practice (USPAP) and signed by a licensed appraiser in your state — the same qualification required for mortgage appraisals.