Assessor

Real Estate and Personal Property Assessments

Informal Hearings for Real Estate Assessments

Informal hearings for real estate assessments will be held at the St. Charles County Election Authority, located at 397 Turner Blvd., St. Peters. View the map for parking and entrance information.

For questions, please contact the Assessor's Real Estate Office at 636-949-7428. Learn more about real estate assessments.

Informal Hearings Map

E-File Your 2021 Personal Property Assessment

Use your account number and access code located on your assessment form and follow the prompts. Assessments are due March 1.

NOTE: If you do not receive a form by mid-February, please contact Personal Property at 636-949-7420 or by email.

Assessment Form 2021 Graphic

COVID-19 Latest News

Visitors to County buildings are required to review a health screening checklist before entering and are encouraged to wear face coverings. Those with COVID-19 symptoms and/or known exposure to someone diagnosed with COVID-19 within the past 14 days should remain at home. The public is strongly encouraged to continue accessing County Government services by phone, email and online when available. 

The Assessor’s Personal Property service windows on the first floor are open to the public. Please sign up for our virtual queue through QLess. For further questions, call our department at 636-949-7425.

Get in Line with QLess

Avoid crowds and save time with real-time status updates. Visitors to the Assessor’s Office can join a virtual queue from their mobile device or computer using the free QLess app, or by checking in at the kiosk in the Administration Building lobby. QLess is available for Personal Property and Real Estate services.

Additional News

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.