If you have never received a Homeowner Exemption on your home, you will need to file an initial application. Property tax exemptions are savings that contribute to lowering a homeowner's property tax bill.The most common is the Homeowner Exemption. For information and to apply for this homestead exemption, contact the Cook County Assessor's Office. Link to obtain further information about the various exemptions that are offered, the documents and filing process required for each exemption to be claimed. The BOR accepts exemption applications for approximately 30 days, four times each year. To apply or for homestead classification fill out and return to the Assessor's Office a homestead application. A list of required documents for charitable or educational ownership property tax exemption. You may apply for homestead exemption in the Tax Assessor's office. To qualify, you must both own and occupy your home as of January 1.