2017 Real Estate Assessment Information

The St. Charles County Assessor will mail the 2017 Notices Of Real Estate Assessment starting the third week of April. State law requires the Assessor to revalue all real property in the county as of January 1 of every odd-numbered year. The valuation notices reflect the change in value since Jan. 1, 2015 - view our latest news.

2017 Personal Property Assessment Information 

The St. Charles County Assessor Reminds Residents to Declare Personal Property - view our latest news. Forms were due by March 1, 2017; late fees will be issued by May 1.

Visit our Personal Property Assessment E-File site to file online - please see the graphic below for the location of your unique access code on the form. You need this code to file online. Visit our Personal Property Assessment Confirmation Database to confirm receipt of your form.
2017 Personal Property Assessment Form

New Agricultural Productivity Values (As of January 1, 2015)
View the new values for agricultural/horticultural land

The Assessor is charged with placing a fair market value on property as of the tax date. The property tax in Missouri is “ad valorem” meaning the taxes are based on the property value.

The Assessor has no jurisdiction or responsibility for taxing jurisdiction budgets or establishing the tax rate.

Please note: Information maintained by this office is for Assessment purposes only and should not be used to verify or transfer ownership. All maps maintained, provided and/or purchased are based on Assessment information and do not represent a legal survey of the parcels shown and shall not be used for conveyance or the establishment of property boundaries.

Please watch the video below to learn more about the Assessor's office, processes, and responsibilities.


Tax Bills
Your tax bill is comprised of 3 key components:
  • Assessment Authority
  • Taxing Authority
  • Collection Authority
Assessment Authority
The assessment authority (Assessor’s Office) is responsible for establishing the fair market value of all property within St. Charles County as of the tax date. This assures the tax burden is distributed fairly among those responsible for payment.

Taxing Authority
The taxing authority (school, city, fire districts, etc.) establishes the tax rate based on the budgetary requirements needed to appropriately fund the services provided within their jurisdiction.

Collection Authority
The collection authority (Collector’s Office) is responsible for collecting the amount of tax assigned to each property owner.