ParcelProof

Kane County property assessments

What the county's own roll says, and how many parcels sit above their neighbours.

203,320parcels on record
44,609with a published assessment
$101,978median assessed value
15,041above their neighbourhood median

Among those, the typical excess is $9,719 of assessed value above the median for like-classified land in the same town — $146,181,956 in total across Kane County.

roughly 1 in 3 Kane County properties is assessed above its local median. Whether yours is one of them takes a few seconds to find out — the comparison runs against the same 44,609 assessed parcels shown above.

Check my Kane County address →

Free to check. Nothing is filed on your behalf, and a verdict of "not worth appealing" is the answer we return most often.

A median has half of everything above it by definition, boards do not grant every uniformity claim, and being above a median is a ground to argue rather than proof of error. These are assessed values, not tax bills.

Your deadline in Kane County

30 days from the publication of your township's assessment roll in the local newspaper. The window is short and it is not the same date across the county.

Statutory basis: 35 ILCS 200/16-55. A late filing cannot be cured, so confirm the date on your own notice — it is not the same across the county.

How the assessment was calculated

Illinois assesses at 33.33% of market value. The assessor estimates market value by mass appraisal — a model over recent sales, adjusted by the characteristics they hold on file for your property. If those characteristics are wrong, the number is wrong. The full anatomy is here.

The argument most people miss

Beyond “my house is worth less than they say”, the Illinois Constitution requires uniform taxation. If comparable property near you is assessed at a lower rate per square foot, that is a ground for relief in its own right — no appraisal needed, and built from figures the assessor published themselves.

Towns in Kane County

Aurora — 36,680 parcels Elgin — 32,223 parcels St Charles — 20,430 parcels Geneva — 11,503 parcels Carpentersville — 11,377 parcels Batavia — 10,628 parcels South Elgin — 9,485 parcels North Aurora — 6,703 parcels Sugar Grove — 5,504 parcels Hampshire — 5,481 parcels Pingree Grove — 4,850 parcels Elburn — 4,846 parcels Huntley — 4,146 parcels Algonquin — 3,655 parcels Gilberts — 2,995 parcels Montgomery — 2,897 parcels West Dundee — 2,775 parcels Maple Park — 1,845 parcels East Dundee — 1,752 parcels Sleepy Hollow — 1,252 parcels Dundee — 1,017 parcels Big Rock — 811 parcels

Check your Kane County address — free, no account

Three things you can run right now, free

See a real analysis first

A genuine run against a real Illinois property, generated when you open the page — the verdict, the comparable parcels, and every step of the arithmetic. Nothing to type.

The Twin Test

The parcels the county's own records describe the same way as yours — same class, same town, same size — and what each of them is assessed.

Portfolio Triage

More than one property in Kane County? Paste up to 1,000 PINs and get the whole book ranked by what an appeal is actually worth — including which ones to drop.