Who can file the Homestead Improvement Exemption Application?

Property owners may file to request an exemption for qualifying improvements to homestead property or rebuilding after a catastrophic event, once the work is completed and occupied.

What information and documents does the application ask for?

It asks for owner and property information, improvement details, eligibility answers, and proof of ownership, such as a deed, contract for deed, trust agreement, lease, or other written instrument.

Do I need a notary for the Homestead Improvement Exemption Application?

No. The application is signed and dated without a notary, and it does not require a notarized attachment or sworn step.

Knox County, IL · Knox County

No notary required

Homestead Improvement Exemption Application

Property owners use this application to request a homestead improvement exemption for qualifying improvements or rebuilding on their principal residence.

At a glance

Issued by: City of Knox County · Knox County, Knox County, Illinois
Notarization: Not required: file this form without a notary.
Official source: knoxcountyil.gov
Blank form: Download the PDF
Catalogued: Oct 5, 2026
Machine-readable: JSON record · about the forms index

What this form is

Form PTAX-323 requests a homestead improvement exemption for qualifying new improvements to existing homestead structures or residential rebuilding after a catastrophic event. File it once the work is completed and occupied. The application asks for owner and property details, information about the improvement and eligibility, and proof of ownership; the owner or authorized representative signs and dates it.

Who needs it

Property owners seeking an exemption for qualifying improvements or rebuilding on their principal residence may file this application after the work is completed and occupied.

How to submit it

Mail the completed form to the local assessing official at Knox County Assessment Office, 121 S Prairie Street, Galesburg, IL 61401.

About notarization

This application is signed and dated without a notary; it does not require a notarized attachment or sworn step.

How to submit this form

1
Download the Application
Download Form PTAX-323 to request a homestead improvement exemption.
2
Complete the Application
Provide the owner and property details, describe the improvement or rebuilding, answer the eligibility questions, and sign and date the form.
3
Gather Proof of Ownership
Attach documentation showing ownership or a legal or equitable ownership interest, such as a deed or other written instrument.
4
Mail the Application
Mail the completed form to Knox County Assessment Office, 121 S Prairie Street, Galesburg, IL 61401.

Frequently asked questions

Who can file the Homestead Improvement Exemption Application?: Property owners may file to request an exemption for qualifying improvements to homestead property or rebuilding after a catastrophic event, once the work is completed and occupied.
What information and documents does the application ask for?: It asks for owner and property information, improvement details, eligibility answers, and proof of ownership, such as a deed, contract for deed, trust agreement, lease, or other written instrument.
Do I need a notary for the Homestead Improvement Exemption Application?: No. The application is signed and dated without a notary, and it does not require a notarized attachment or sworn step.
How do I submit the Homestead Improvement Exemption Application?: Mail the completed form to the local assessing official at Knox County Assessment Office, 121 S Prairie Street, Galesburg, IL 61401.

Need something notarized?

This Homestead Improvement Exemption Application doesn’t need a notary, but Illinois residents can notarize other documents online with a commissioned online notary.