Message From Your Assessor, Mary Mahady

McHenry Township Property Owners for parcels starting with      09 & 10:

Our assessments are being published on Tuesday, September 1, 2020 in the Northwest Herald and the notices are being mailed on Thursday, August 27, 2020.  The deadline for appeal is Thursday, October 1, 2020

Please be sure to read your notice for important information such as:

  • Market Value
  • Assessed Value
  • Exemptions
  • Filing Deadline Date
  • McHenry Township Contact Information


Please call our office at (815) 385-0175 or email to schedule an appointment.  We may be able to walk you through your appeal process over the phone and an appointment may not be necessary.  Should we determine you need to meet with an Assessor, business hour appointments will be on Monday, Wednesday and Friday from 9:00 am until 3:00 pm.

September 2, 4, 9, 11, 14, 16, 18, 21, 23, 25, 28 & 30, 2020.

Extended hours for appointments will be scheduled as listed below:

Tuesday, September 8, 15, 22 & 29

5:00 pm to 8:30 pm

Thursday, September 3, 10, 17, 24

5:00 pm to 8:30 pm

Saturday, September 12 & 26

9:00 am to 1:00 pm

As it appears we will be limiting public contact for a while longer, I want to provide information on exemptions that you may have questions about.

McHenry Township Assessor Mary Mahady

Senior Freeze

To County has extended the filing date to September 15, 2020.

The County has extended the filing date to September 15, 2020.  If you had the Senior Freeze exemption last year, the County will automatically renew the exemption this year without having to submit this year’s application.  Please call the County Assessments Office at (815) 334-4290 to request to be sent the form for 2021.

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!   

We look forward to being able to see you in person soon. Until then, stay safe and stay healthy!

Mary Mahady

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