How to Apply for a Certificate of Error (Homeowner Property Tax Exemption)
Applying for a Certificate of Error
If you believe you were eligible for a Homeowner Property Tax Exemption in a previous tax year but did not receive it, you may be able to apply for a Certificate of Error. This process allows eligible homeowners to retroactively apply for missed exemptions and potentially receive a property tax adjustment.
Applications are submitted online through the Cook County Assessor’s Office website and typically take only a few minutes to complete once documentation is ready.
Determine Eligibility
To qualify for the Homeowner Exemption, all of the following must apply:
- You are the owner of the property, or
- You have a contract that makes you responsible for paying real estate taxes, and
- You occupied the property as your principal residence on January 1 of the application year
If you meet these criteria, you may proceed with the application .
Required Documentation
Before starting your application, gather the following:
- Proof of identity
- Proof of occupancy for the application year
Important note:
A single ID card or driver’s license that confirms both identity and occupancy is acceptable. Otherwise, you will need to upload two separate documents .
Step-by-Step: How to Apply for a Certificate of Error
1. Visit the Exemption Website
Navigate to the Cook County Assessor’s Homeowner Exemption page:
https://www.cookcountyassessor.com/homeowner-exemption
2. Select the Correct Application Type
Provide your name and email address to begin the application. If prompted, check your email for a verification link or code and use it to continue.
3. Complete the Application Details
Enter your property and ownership information. Be sure to select Homeowner Exemption and choose the correct tax year or years. Multiple years may be selected if applicable.
4. Upload Required Documentation
Attach proof of identity and proof of occupancy. Confirm that all documents are clear, legible, and reflect the correct application year.
5. Review and Complete the Affidavit
Read the affidavit carefully and confirm that all information provided is accurate.
6. Sign and Submit the Application
Electronically sign the application and submit it for review by the Cook County Assessor’s Office.
Tips for a Smooth Signing
Prepare your documents in advance to avoid delays. Double-check that the correct exemption year or years are selected before submitting. If you need to pause your application, use the emailed link to resume where you left off.
Final Thoughts
Applying for a Certificate of Error is a straightforward way to correct missed Homeowner Property Tax Exemptions from prior years. Once submitted, your application will be reviewed by the Cook County Assessor’s Office.
If you have questions about how property tax exemptions may affect your mortgage or refinance, your UnrealFi loan advisor is always available to help.
