Butler County Property Tax Protest Guide
In Butler County, file your protest by April 30, 2026 at Butler County Assessor's online portal.
| Deadline | File a protest of assessment with the local Board of Review on or after April 2, to and including April 30, of the assessment year. (Disaster-area exception: in a county declared a federal disaster area or subject to a gubernatorial disaster emergency proclamation between March 1 and May 20, the Board of Review may remain in session until July 15 and the protest period is extended to May 1 through June 5.) |
|---|---|
| Lien date | January 1, 2026 |
| Protest body | local Board of Review (Board of Review) |
| Assessor / district | Butler County Assessor |
| Online portal | File online |
How to File a Protest in Butler County
- Gather your assessment notice — it lists your account number and any access code
- File online through Butler County Assessor's portal or by mail
- State your grounds and submit evidence (comparable sales, a licensed appraisal, or photos of defects)
- Request an informal review to try to settle before a formal Board of Review hearing