Reviewed and updated October 9, 2026 by the SearchSystems.net editorial team. Every office link was opened and checked against the office's own site between September 23, 2026 and October 4, 2026.
Warren County, Missouri, has about 38,000 residents (2024 Census Bureau estimate). The title to a parcel in Warren County is in the deed records of the Recorder of Deeds and its taxable value is set by the County Assessor; what is built on it is a matter for the city or the county. This guide says who keeps each record and where the page for each office is.
This guide covers deeds, assessed values, city permits, evictions and court cases, records requests and common questions.
Related guides: Warren County public records, Warren County arrest records, Warren County warrants, Warren County inmate search, Warren County criminal records, Missouri arrest records and Missouri inmate search.
Deeds, Mortgages and Liens in Warren County
Who owns a parcel in Warren County and what it sold for are in the deed records of the Recorder of Deeds, with every lien or mortgage against the land.
SearchSystems opened and checked the Recorder of Deeds' page at warrencountymorecorder.com (page title: Warren County MO Recorder | Warren County MO Recorder), phone 636-456-9800, 101 Mockingbird Ln Suite 303 Warrenton, MO 63383, Monday thru Friday 8am to 4:30 pm., which answered when SearchSystems opened it on September 23, 2026.
Assessed Values and the Tax Roll in Warren County
The County Assessor sets the value each parcel in Warren County is taxed on and keeps the parcel maps. Missouri reassesses property in odd-numbered years and assesses homes at 19 percent of market value.
SearchSystems opened and checked the County Assessor's page at warrencoassessor.com (page title: Warren County Missouri Assessor), phone 636-456-8885, which answered when SearchSystems opened it on September 23, 2026.
Permits and City Records in the Cities of Warren County
Building permits, zoning and code cases inside a city are the city's own records. The cities in Warren County with a SearchSystems guide to their offices, with the city page SearchSystems verified:
- Warrenton: the city hall page SearchSystems verified is at warrenton-mo.org/contact-us, phone 636-456-3535 (verified September 26, 2026).
Evictions and Court Cases About Land in Warren County
An eviction, a foreclosure, a lien dispute or a quiet title suit is a court case in the Warren County Circuit Court, and the file is public unless sealed.
Asking a County Office for a Record
Under the Missouri Sunshine Law a county office must answer a request within 3 business days, and it may charge research time and copying.
Frequently Asked Questions
Who records deeds in Warren County?
The Recorder of Deeds, at warrencountymorecorder.com, phone 636-456-9800. Deeds, mortgages and liens on land in Warren County are filed there, and the County Assessor (warrencoassessor.com) has the assessment records.
Who sets the assessed value of a property in Warren County?
The County Assessor, whose page SearchSystems verified is at warrencoassessor.com.
Where are evictions from Warren County filed?
In the Warren County Circuit Court. The file is public unless the court seals it.
How is property assessed in Missouri?
Missouri reassesses property in odd-numbered years and assesses homes at 19 percent of market value.
Is this the official Warren County website?
No. SearchSystems.net is an independent public records guide, online since 1997. It links to the official county, court and state offices described above and does not hold records, charge for them or take requests.