Grundy County

Official Website of Grundy County Government Offices

How do I read my Tax Bill?

  1. STIF Base Value = assessment frozen for senior's base year.
  2. Fair Market Value / 3 = Total Value.
  3. Total Value - Exemption = Net Value.
  4. Net Taxable Value x Tax Rate % = $ taxes.
    Itemized statement show $ to each district.


Mobile Home Taxes

Mobile Home taxes are based on the age of the mobile home and the square footage.

Model YearTaxes per Square Foot
1st and 2nd year 15 cents
3rd, 4th and 5th year 13.5 cents
6th, 7th and 8th year 12 cents
9th, 10th and 11th year 10.5 cents
12th, 13th and 14th year 9 cents


Mobile home tax money is distributed to the various taxing districts such as schools, libraries, townships, etc.

A 20% discount for senior citizens.

Mobile home taxes must be paid in full to receive a tax release from the Grundy County Treasurer. The release must accompany the title when sent to the State of Illinois for re-issuance of a new title.