Assessor

COVID-19 Latest News (Updated May 29, 2020)

The St. Charles County Administration Building at 201 N. Second Street in St. Charles is now reopen to the public with normal operating hours. Access is limited to the first floor. Upon entrance to any County building, employees and the public are encouraged to wear cloth facial protection, and everyone is required to have a health screening, including temperature check, before entering. Those with a fever or who have other COVID-19 symptoms will not be permitted to enter the building. View release for more information.

The Assessor’s windows on the first floor are open to the public. For other matters, visitors are encouraged to call 636-949-7425 to make an appointment.

This website will be updated to reflect any changes in facility or department services. The public is encouraged to continue accessing County Government services by phone, email and online when available. Thank you.

COVID-19 Real Estate Impact

Visit our Real Estate page for information.

Confirm Receipt of Your 2020 Personal Property Assessment 

Visit our Personal Property Assessment Confirmation Database. If you e-filed, please wait two business days for updated information. Thank you!

Flooding Update: Application for Removal of Residential Improvements

Homeowners whose property is destroyed by flooding in 2019 can apply to have their real estate assessment modified through the St. Charles County Assessor’s office. The property must be inspected and determined to be “unsafe” and uninhabitable by the St. Charles County Division of Building and Code Enforcement

Responsibilities

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 taxes are based on property value. 

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

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.

Certificate of Non-Assessment (Tax Waiver)

A Certificate of Non-Assessment, also known as a tax waiver, may be obtained at the Assessor's Office if you did not own a vehicle in St. Charles County on January 1. The Certificate is required by the Missouri Department of Revenue to license motor vehicles or obtain a business license in St. Charles County. Learn more about requirements for the Certificate of Non-Assessment.

Resources

Tax Bills

Your tax bill is comprised of three 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 of Revenue’s Office) is responsible for collecting the amount of tax assigned to each property owner.