Find Warren County Property Tax Records

Warren County property tax records are managed by the assessor and collector offices in Warrenton, Missouri. These records include assessed values, tax bills, payment history, and ownership data for every parcel of real estate and personal property in the county. The collector handles over $51 million in annual tax collections and distributes funds to local school districts, fire districts, and other taxing entities. You can search these records online, by phone, or in person at the Warren County Administration Building. This page walks you through the offices, tools, and steps for finding the tax records you need.

Warren County Property Tax Assessor

The Warren County Assessor, Kathryn Smith, runs the office that determines property values. The office is in the Warren County Administration Building at 101 Mockingbird Lane, Suite 202, Warrenton, MO 63383. You can call the direct line at 636-205-8742 or the main office at 636-456-8885 ext 1227. The fax number is 636-456-9024. Email property questions to property@warrencountymo.org.

The assessor handles both real estate and personal property valuations. Real estate is reassessed every odd-numbered year using sales data and comparable properties. Residential property is assessed at 19% of market value under RSMo 137.115. Commercial real estate uses a 32% rate. Agricultural land is assessed at 12% based on productivity rather than what the land would sell for. You can search property data through the Warren County Assessor website or the Warren County assessor portal.

The assessor's office cannot process emailed assessment sheets. You must mail them in or use the electronic filing option. For tax questions or receipts, contact the collector at 636-456-3330 instead.

Warren County Tax Collector

The Warren County Collector, Julie Schaumberg, manages all property tax payments. The office is at 101 Mockingbird Ln, Suite 200, Warrenton, MO 63383. Call 636-456-3330 with questions. The fax is 636-456-5052 and email is collector@warrencountymo.gov. Office hours run Monday through Friday, 8:00 am to 4:30 pm.

The collector distributes over $51 million each year to political subdivisions across Warren County. This includes school districts, fire districts, road districts, and the county general fund. The office collects both current and delinquent property taxes. If you have past due taxes, the collector must use all legal means to collect them, including holding an annual tax certificate sale on the fourth Monday in August. You can find more details on the Warren County Collector website.

Paying Property Taxes in Warren County

Tax bills are mailed the first week of November. They are due when you get them and must be paid no later than December 31. The postmark on a mailed check determines the payment date. If you do not get your bill by Thanksgiving, call the collector's office. Not getting a bill does not excuse you from paying.

Warren County accepts several payment methods. You can pay in person, by mail, online, or through a drop box at the courthouse. The office takes cash, personal checks, money orders, and cashier's checks. Debit and credit cards are accepted in the office and online, but a processing fee applies. You can also pay by phone through a third-party service at 1-877-690-3729 using jurisdiction code 3563. Check the tax information page for current rates and details.

When you pay, inspect your tax statement for accuracy first. Return the bottom portion of the statement with your payment. If something looks wrong on your bill, the collector cannot change it without the assessor's involvement. Contact the assessor to fix errors on your assessment before paying.

Note: Delinquent tax years must be paid before you can pay your current year balance in full.

Warren County Tax Sale Records

Warren County holds an annual tax sale for properties with unpaid taxes. The sale takes place on the fourth Monday in August each year. The collector offers delinquent real estate parcels at public auction under Chapter 140 of the Missouri Revised Statutes. Buyers pay the back taxes and get a certificate of purchase. The original owner has a redemption period to pay back the amount plus interest. If nobody redeems the property, the buyer can eventually get a collector's deed.

The 2025 tax sale properties list is available through the collector's office. Properties end up on this list when taxes have gone unpaid for two or more years. If you own property in Warren County and have fallen behind, contact the collector at 636-456-3330 to work out a plan before your property goes to sale.

Tax Appeals in Warren County

If you disagree with your Warren County property assessment, start by calling the assessor at 636-205-8742. Many value disputes get resolved through an informal review. If that does not work, file a formal appeal with the Board of Equalization through the county clerk. The board meets each summer and can adjust values based on evidence like comparable sales, appraisals, or condition documentation.

You can take your case to the Missouri State Tax Commission if the local board does not lower your value. File by September 30 or within 30 days of the board's decision. Residential appeals are free at this level. The commission holds formal hearings and has the power to order changes to assessed values statewide.

Nearby Counties

These counties are next to Warren County. You can search their property tax records too.