Message From Your Assessor, Mary Mahady

Our 2022 Assessment Values will be published in the Northwest Herald on Monday, September 26, 2022. The Notices will be mailed out on Friday, September 23, 2022 so you should expect them on Saturday or the following week. Our deadline date for appeals will be Wednesday, October 26, 2022.

Please check your notice for your current exemptions, and if you feel you are entitled to exemptions that are not indicated on your notice, please call my office.

We recommend scheduling an appointment if you are in need of assistance with your appeal. Please call my office at 815-385-0175 or by email: [email protected].

The forms can be found on the appeals page under appeal forms.

We are here Monday through Friday between 8:30am – 4:30pm to assist you. Our building is now open but ask that you call for an appointment when you need assistance with exemption forms or to review your property information. This allows us to make sure I have staff available to assist you in a timely manner.


Mary Mahady, C.I.A. O.
McHenry Township Assessor

Our next Facebook Live will be on Wednesday, October 5, 2022 at 3:30pm. As always if you have questions, please feel free to contact my office or email me at [email protected]

McHenry Township Assessor Mary Mahady

Senior Freeze

The 2022 Senior Freeze Forms were due July 1, 2022, but the County will still accept them if you have yet to apply or renew for this year. Please call my office to make an appointment at 815-385-0175.

Homeowner Exemption

If you should be receiving this exemption but it does not show on your tax bill, please call us. We can verify this with the proper documentation and submit a correction to the tax bill, but you need to contact us. If you are not sure, just call and we will check for you.

Senior Homestead

You are eligible for this if you have the General Homestead exemption and anyone on title is 65 or older.

As much as we like to see you, please call if you have any questions as we can rectify most situations over the phone. Our first priority is to keep you safe and until we can fully open to the public, we will find a way to take care of you any way we can…just call!  

During our time of appeal or when applying for exemptions, we ask that you make an appointment with our office by calling 815-385-0175. We do have availability for appointment during business hours on Monday, Wednesday and Friday from 9:00am through 3:00pm with a break for lunch from 12-1pm. We will be scheduling after hours appointments, if necessary, to be determined at a later date.

Mary Mahady

We are here to assist you so don't hesitate to call if you have any questions!