Illinois Property Tax Assessors

LaSalle County, Illinois Tax Assessors' Office

LaSalle County Assessors Phone Number
LaSalle County Chief Assessment Officer
707 East Etna Road
La Salle County Courthouse
Ottawa, Illinois 61350

Where is the LaSalle County Tax Assessor's Office?

The LaSalle County Tax Assessor Office is located in the La Salle County Courthouse building in Ottawa, Illinois.

What can the LaSalle County Assessor's Office do for me?

The LaSalle County Tax Assessor's Office oversees the appraisal and assessment of properties as well as the billing and collection of property taxes for all taxable real estate located in LaSalle County.

Contact the assessor's office if you need help with paying your property taxes, applying for a homestead exemption or other tax exemption, reporting upgrades to your home, appealing your property tax assessment, or verifying your property records.

Submitting a LaSalle County property tax appeal

If you believe that your house has been unfairly overappraised (i.e. appraised at a value higher than the true market value of the property), you can attempt to get your home re-appraised at a lower value by contacting the Assessor's Office to submit a property tax appeal.

You will have to submit a form describing your property and sufficient proof that it is overassessed, including valuations of similar homes nearby as evidence. If your appeal is accepted, your home assessment (and property taxes) will be lowered as a result.

If you would like to appeal your property, call the LaSalle County Assessor's Office at (815) 434 8233 and ask for a property tax appeal form. Keep in mind that property tax appeals are generally only accepted in a 1-3 month window each year.

For more information and example appeals, see how to appeal your property taxes.

Useful LaSalle County Facts:

The median home value in LaSalle County is between $122,133.00 and $128,867.00. Property tax rates are based on property values.

How can I contact LaSalle County?

You can try contacting the LaSalle County local government directly with any issues the Assessor's Office can't solve. In many counties, certain property records such as deeds are kept in the county courthouse or county archives instead of at the tax assessors' office.

The county seat for LaSalle County is located in the County Courthouse in Ottawa, which is where the LaSalle County Assessors' Office is also located. You can direct your general inquiries to LaSalle County with the contact info listed below.

LaSalle County Phone Number


LaSalle County Fax Number


LaSalle County County Courthouse Address

County Courthouse
707 E Etna Rd
Ottawa, IL 61350-1047

Useful LaSalle County Links:

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