Arlington Heights property tax appeal 2026

26% of Arlington Heights homes may be assessed higher than similar homes nearby. Check yours free.

Deadline for Arlington Heights

Arlington Heights is split between townships. Your assessment notice names yours, and the free check sorts it for you.

  • Wheeling Township: file with the Cook County Assessor by October 22, 2026.(today is the last day) Wheeling filing guide
  • Palatine Township: file with the Cook County Assessor by November 4, 2026.(13 days left) Palatine filing guide

What the public records show

Homes checked
23,102
May be assessed too high
5,959 (26%)
Median estimated saving
$726 a year

Data as of October 20, 2026. Source: Cook County Assessor open data (2026 assessed values, property characteristics and recorded sales), checked by Morganwell. Estimates from public records, not an appraisal and not a promise; the county decides every appeal. How the check works

Arlington Heights streets

Streets with at least 15 homes we check. Each street page lists its homes.

ZIP codes: 60004, 60005

Questions

When is the Arlington Heights property tax appeal deadline in 2026?
Arlington Heights is split between Wheeling Township and Palatine Township; your assessment notice says which one your home is in. Wheeling Township: file with the Cook County Assessor by October 22, 2026. Palatine Township: file with the Cook County Assessor by November 4, 2026.
How many homes in Arlington Heights are assessed higher than similar homes?
Of 23,102 homes we checked against the county's 2026 values, 5,959 (26%) come up assessed higher than similar homes nearby or above what similar homes sold for. Among those, the median estimated saving is about $726 a year.
Does it cost anything to appeal?
No. Filing with the Cook County Assessor and with the Board of Review is free, and homeowners can file for themselves without a lawyer.
How do I check my Arlington Heights home?
Type your address in the box on this page. The check is free, takes about 10 seconds, and compares your home with similar homes nearby using the county's own records.

Morganwell is not a law firm and does not give legal advice. You file your own appeal. No outcome is guaranteed.