Supported counties
Property tax appeal help built county by county
Every live county uses the same HomeTaxChallenge lookup, comparison, and savings-estimate core with local public-data adapters, filing rules, forms, deadlines, and copy.
We only call a county supported when the full workflow is ready. A county name on this page links to its dedicated calculator and local information pages — homeowners are not sent through a generic calculator.
Live now
Kane County, Illinois
Any city, village, or township parcel in Kane County.
- Address and parcel lookup using county public records
- Comparable-property screening and savings estimate
- Local filing deadline tracker
- County appeal guide and 30 community pages
Live now
Winnebago County, Illinois
Any city, village, or township parcel in Winnebago County.
- Address and parcel lookup using county public records
- Comparable-property screening and savings estimate
- Local filing deadline tracker
- County appeal guide and 13 community pages
Don't see your county?
Use the county finder on the HomeTaxChallenge homepage to join the notification list. Requests help prioritize the next full-parity county build.