DeKalb County deadline tracker

DeKalb County 2026 assessment appeal deadlines

In DeKalb County, you don't get one countywide deadline. Each township publishes its assessment list in a local newspaper, then you generally have about 30 days to file with the Board of Review. City limits are not township lines — check your parcel.

How to use this tracker Find your township → note its status → if open, run a free estimate; if TBD, get an alert; if closed, review next-step options.
Open — You can still file for 2026. TBD — The assessment list is not published yet. Closed — The 2026 Board of Review window ended.

Verified against DeKalb County sources: October 1, 2026. Statuses use America/Chicago time.

Open for 2026 filing

19 townships
Open

Afton Township

Deadline: October 13, 2026

11 days left. Published September 10, 2026 in the DeKalb County publications and deadlines.

Check my property
Open

Clinton Township

Deadline: October 13, 2026

11 days left. Published September 10, 2026 in the DeKalb County publications and deadlines.

Check my property
Open

Cortland Township

Deadline: October 13, 2026

11 days left. Published September 10, 2026 in the DeKalb County publications and deadlines.

Check my property
Open

DeKalb Township

Deadline: October 13, 2026

11 days left. Published September 10, 2026 in the DeKalb County publications and deadlines.

Check my property
Open

Franklin Township

Deadline: October 13, 2026

11 days left. Published September 10, 2026 in the DeKalb County publications and deadlines.

Check my property
Open

Genoa Township

Deadline: October 13, 2026

11 days left. Published September 10, 2026 in the DeKalb County publications and deadlines.

Check my property
Open

Kingston Township

Deadline: October 13, 2026

11 days left. Published September 10, 2026 in the DeKalb County publications and deadlines.

Check my property
Open

Malta Township

Deadline: October 13, 2026

11 days left. Published September 10, 2026 in the DeKalb County publications and deadlines.

Check my property
Open

Mayfield Township

Deadline: October 13, 2026

11 days left. Published September 10, 2026 in the DeKalb County publications and deadlines.

Check my property
Open

Milan Township

Deadline: October 13, 2026

11 days left. Published September 10, 2026 in the DeKalb County publications and deadlines.

Check my property
Open

Paw Paw Township

Deadline: October 13, 2026

11 days left. Published September 10, 2026 in the DeKalb County publications and deadlines.

Check my property
Open

Pierce Township

Deadline: October 13, 2026

11 days left. Published September 10, 2026 in the DeKalb County publications and deadlines.

Check my property
Open

Sandwich Township

Deadline: October 13, 2026

11 days left. Published September 10, 2026 in the DeKalb County publications and deadlines.

Check my property
Open

Shabbona Township

Deadline: October 13, 2026

11 days left. Published September 10, 2026 in the DeKalb County publications and deadlines.

Check my property
Open

Somonauk Township

Deadline: October 13, 2026

11 days left. Published September 10, 2026 in the DeKalb County publications and deadlines.

Check my property
Open

South Grove Township

Deadline: October 13, 2026

11 days left. Published September 10, 2026 in the DeKalb County publications and deadlines.

Check my property
Open

Squaw Grove Township

Deadline: October 13, 2026

11 days left. Published September 10, 2026 in the DeKalb County publications and deadlines.

Check my property
Open

Sycamore Township

Deadline: October 13, 2026

11 days left. Published September 10, 2026 in the DeKalb County publications and deadlines.

Check my property
Open

Victor Township

Deadline: October 13, 2026

11 days left. Published September 10, 2026 in the DeKalb County publications and deadlines.

Check my property

Publication date still TBD

0 townships

2026 filing window closed

0 townships

Deadline alerts

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Official DeKalb County sources

DeKalb County published the 2026 assessment rolls for all 19 townships on September 10, 2026, with a county-wide final filing date of October 13, 2026. The 2026 residential appeal packet states that a supplemental evidence extension to October 27, 2026 is available only if the extension form is filed with the appeal by October 13. Current county materials list paper mail or in-person filing, not e-file, fax, or email filing.

Disclaimer: HomeTaxChallenge is not a government agency and is not affiliated with the DeKalb County Assessment Office or DeKalb County Board of Review. Always confirm dates on the official county sources above. This is not legal, tax, or appraisal advice.