Lake County Property Tax Appeal Guide
In Lake County, file your appeal by June 15, 2026 at Lake County Assessor's online portal.
| Deadline | File Form 130 (Taxpayer's Notice to Initiate an Appeal) with the local assessing official or county auditor by June 15 of the assessment year if the county mailed the Form 11 Notice of Assessment of Land and Structures before May 1 of that assessment year; if the Form 11 is mailed on or after May 1, the deadline is June 15 in the year the tax statements are mailed. (Indiana assesses property as of the January 1 assessment date, and a taxpayer may also initiate an appeal even when no Form 11 was issued, using the same June 15 / tax-statement-year framework.) |
|---|---|
| Lien date | January 1, 2026 |
| Appeal body | Property Tax Assessment Board of Appeals (PTABOA) |
| Assessor / district | Lake County Assessor |
| Online portal | File online |
How to File a Appeal in Lake County
- Gather your assessment notice — it lists your account number and any access code
- File online through Lake 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 PTABOA hearing