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Regarding Notice of Discovery mailings
DISCLAIMER: The Assessor’s Office does not provide legal advice. If you have legal questions regarding the audit relating to your property or any other matter relating to your property taxes, you should contact an attorney.

The Notice of Discovery that you received is to notify the taxpayer that the Assessor’s Office will be conducting an audit to verify whether or not you are entitled to the homestead exemptions that you have received on your non-homestead property. Taxpayers are only entitled to one homestead exemption on their primary residence for any given tax year. If you received a notice of discovery for your primary residence, please contact the Assessor’s Office if you have not already done so. You may contact the Assessor’s Office either by email using the Contact Us link, or by telephone at (312) 603-7434.

Receipt of this notice does not mean that the taxpayer has been found to have an exemption they are not entitled to. If the Assessor’s Office, through its audit, finds that you have received an exemption that you are not entitled to, you will receive a notice of intent to lien the property, at which time you will be able to request an administrative hearing to determine your liability. Please consult our website for further information regarding this matter.

Berrios Mails Lake Township Reassessment Notices
Reassessment Notices Mailed to Lake Township Taxpayers
Residential Assessments Increase by a Median of 8.9%; Median Sale Price for Homes is $141,500 Read more...


Notice regarding "Bed and Breakfast" properties
In February of 2015, the Cook County Assessor began mailing notices to the owners of so-called "Bed and Breakfast" properties in Cook County indicating that such real estate would be re-classified from residential to commercial. Read more...


Model Home Application deadline
The deadline to file a 2015 Model Home Application, FOR ALL TOWNSHIPS, by statute,
was Thursday, April 30th, 2015.


Deadline changes
Please be advised that Calumet was moved up significantly in the schedule. Originally estimated for June 8th, 2015, Calumet was mailed March 6th, 2015.
In addition, please note that LakeView's mailing date was changed from March 31st, 2015 to April 8th, 2015 and Lemont's estimated mailing date was moved up from May 29th, 2015 to March 18th, 2015.

Received a Notice of Discovery?

Read Frequently Asked Questions or contact us here

Important Notices

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Office Closure

Notice: The Rolling Meadows branch of the Cook County Assessor’s Office was closed permanently effective as of May 30, 2014. If you need immediate assistance we ask that you visit the Skokie Branch Office or the Downtown Chicago Office.

Report Erroneous Exemptions

When a property is getting an erroneous exemption you are paying more than your fair share.
You can anonymously report erroneous exemptions at
http://whistleblowing.cookcountyassessor.com/