McHenry County, Illinois

Challenge a revised county house value in McHenry County.

For McHenry County homeowners who want to understand whether public assessment and recorded-sale evidence supports a property tax appeal.

County-confirmed parcel lookup Nearby public sales comps Transparent low / mid / high savings range
How we help: We can prepare the appeal for you, just sign and we do the rest. Only pay if your appeal is successful.

Township publication starts a 30-day filing clock

McHenry County publishes 2026 assessment notices by township. McHenry Township is open through October 5; eight townships have published and the remaining township dates are still pending.

  • Search by parcel number or street address
  • See the county's house value and nearby comparable sales
  • Download your estimate after entering your email
  • Check the 2026 township deadline tracker.

Step 1

Find the property

Enter a McHenry County parcel number like 01-25-302-011 or a street address.