Illinois assessment appeal
Illinois assessment appeal prep
Illinois homeowners — especially Cook County — who need PIN-based evidence packages for Assessor or Board of Review filings and prefer flat document-prep pricing.
Who this is for
Illinois homeowners — especially Cook County — who need PIN-based evidence packages for Assessor or Board of Review filings and prefer flat document-prep pricing.
Typical process
- 1Provide your PIN, notice, and township if known.
- 2We research public records and prepare an evidence-oriented package.
- 3You receive a Review or Appeal Plan.
- 4Owner or agent files with the Assessor or Board of Review when the window is open.
2026 window notes
Cook County Board of Review opens by township (~30-day windows). Example 2026: Group 2 filing period closed September 29, 2026. The Cook County Board of Review’s official 2026 schedule shows only Group 3 (Lyons, Northfield, Stickney, West Chicago) still open: appeals October 8 to November 6, 2026, with evidence due November 16, 2026. Other townships aren’t listed for 2026, and the Board suggests pre-registering if yours isn’t listed. Assessor-level appeals have separate calendars. There is typically no BOR filing fee. Always confirm your township dates on the official site.
Source: Cook County Board of Review 2026 dates and deadlines (PDF)
Confirm the deadline on your notice or the official board / assessor site before you file.
What we prepare
- Assessment Review or filed-ready Appeal Plan
- Evidence package support (comps, errors, exemptions)
- PIN-aware intake notes
- Hearing script / talking points
What we don't do
- Appear as your attorney or agent of record
- Guarantee BOR outcomes
- File on your behalf without a separate engagement
- Invent township deadlines — confirm locally
Parcel Plan provides document preparation and educational materials for property-tax appeals in the United States only. We are not a law firm and do not provide legal advice or legal representation. Results vary by county, facts, and deadlines. We do not guarantee assessment reductions or tax savings. You (or a licensed representative you hire separately) are responsible for filing with your county assessor or appeal board.
Confirm your county's deadline on your notice or official board site.