The Homeowner's exemption is a small discount in property taxes given to homeowners. The taxpayer has to be living in the home as of Jan 1st of the tax year in question. An application is usually received around time of purchase but this is not always the case. Homeowners can double check their exemption status by clicking on the Cook County link below and searching by Address or Property Pin Number.
Certificate of Error - Homeowner's Exemption (In case you missed a few years)