Property Tax Hub
Understand the full property tax lifecycle
Cook County property taxes move through four connected offices: the Assessor, the Board of Review, the Treasurer, and the Clerk. Each office has a different job, different deadlines, and different records.
Assessment
The Assessor estimates market value and assigns classification before any appeal is filed.
Open section →2Appeal
The Board of Review hears challenges to assessed value during the open township filing period.
Open section →3Billing
The Treasurer issues bills, accepts payments, shows exemptions, and tracks delinquency status.
Open section →4Records
The Clerk handles tax extensions, delinquent tax records, redemption services, and tax maps.
Open section →Connected offices
One office does not control the entire tax bill. Assessment, appeals, billing, and records are split across separate agencies, which is why deadlines and responsibilities can feel confusing.
- Assessment: Cook County Assessor
- Appeal: Cook County Board of Review
- Billing and collection: Cook County Treasurer
- Records and administration: Cook County Clerk
Quick rule of thumb
If you are questioning your property's value or classification, start with the Assessor and the appeal window. If you are looking at a bill, payment, refund, or delinquency issue, start with the Treasurer. If you need tax extension, redemption, or official tax-map related records, start with the Clerk.