Cook County Property Appraiser & Tax Assessor
Real property appraisal records, parcel search lookup, property tax rates, and assessment protest deadlines for Cook County, Illinois.
Cook County Assessor's Office Information
Cook County Appraisal & Assessment Office, Chicago, IL 17001
Get Driving Directions ↗Monday - Friday: 8:00 AM - 4:30 PM (Local Time)
Closed on state & federal holidays.
(312) 603-7790
Cook County Assessor / Beacon
Cook County Property Tax Calculator
Estimated using Cook County's effective tax rate of 2.25% (Assessment ratio: 33.33%)
Appealing Your Cook County Assessment
Within 30 calendar days from the date of the official township/county assessment publication.
Under Illinois property tax law, property owners in Cook County have the legal right to challenge an assessed valuation that exceeds fair market value, is unequally appraised compared to neighboring properties, or contains clerical errors.
Contact the Cook County Assessor's Office to review your property record card, verify square footage, and present recent comparable sales (comps).
If informal review does not resolve the valuation, file a written notice of appeal with the County Board of Review & Illinois Property Tax Appeal Board (PTAB) before the statutory deadline.
Was Your Cook County Home Over-Assessed This Year?
Studies show up to 30% to 60% of US residential properties are overvalued by automated municipal algorithms. Protesting your assessment before the statutory deadline can lower your tax bill by an average of $1,100/year.
Cook County Homestead Exemptions & Tax Relief
Homeowners in Cook County who occupy their home as their permanent primary residence may qualify for property tax reductions under state and local homestead programs:
General Homestead Exemption reduces equalized assessed value (EAV) by $10,000 in Cook County and $8,000 in all other counties.
Senior Citizens Homestead Exemption ($8,000 in Cook, $5,000 elsewhere) plus Senior Assessment Freeze. 100% property tax exemption for veterans with 70%+ disability.
Need Deed, Lien, or Title Records for Cook County?
While the Property Appraiser values real estate for taxation, official legal property transfers, warranty deeds, mortgages, and marriage records in Cook County are maintained by the County Clerk & Recorder.
Frequently Asked Questions
Where is the Cook County Property Appraiser office located?
The official Cook County property appraisal and tax assessment office is located at Cook County Appraisal & Assessment Office, Chicago, IL 17001. Operating hours are typically Monday - Friday: 8:00 AM - 4:30 PM (Local Time). You can reach the customer service staff by phone at (312) 603-7790.
What is the property tax rate in Cook County, IL?
The average effective property tax rate in Cook County is approximately 2.25%. For a home with the median county market value of $315.000, the estimated annual property tax is about $7088 per year.
How do I search for a property or parcel in Cook County?
You can look up property record cards, assessed valuations, ownership history, and parcel boundary maps online through the official Cook County parcel search portal: https://www.cookcountyclerkil.gov/assessor/parcel-search.
When is the deadline to appeal my property assessment in Cook County?
Property valuation protests and appeals in Cook County must be submitted by: Within 30 calendar days from the date of the official township/county assessment publication. Appeals are formally reviewed and heard by the County Board of Review & Illinois Property Tax Appeal Board (PTAB).
How does the Homestead Exemption work in Cook County?
General Homestead Exemption reduces equalized assessed value (EAV) by $10,000 in Cook County and $8,000 in all other counties. Additional exemptions are available for senior citizens (65+) and disabled military veterans (Senior Citizens Homestead Exemption ($8,000 in Cook, $5,000 elsewhere) plus Senior Assessment Freeze. 100% property tax exemption for veterans with 70%+ disability.).
Adjacent & Neighboring County Appraisers
County Overview
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