Search St. Louis County Property Tax Records

St. Louis County property tax records cover one of the most populated counties in Missouri, with nearly one million residents across dozens of municipalities. The county assessor and collector in Clayton handle all property valuations and tax payments. You can search for tax records, file appeals, and look up assessed values through county offices. This page covers the key contacts, processes, and tools for St. Louis County property tax records.

St. Louis County Property Tax Assessments

The St. Louis County Assessor establishes the True Market Value of every parcel as of January 1 each year. Residential real estate is assessed at 19% of market value under RSMo 137.115. Commercial property is assessed at 32%. Agricultural land gets a 12% rate. Personal property like vehicles is assessed at 33.33%. Real estate is reassessed every two years in odd-numbered years.

St. Louis County is home to dozens of municipalities, each with its own mix of taxing districts. Schools, fire districts, the county itself, and city governments all set their own levy rates. That means two homes with the same market value can end up with very different tax bills depending on which taxing districts they fall in. The county clerk applies all local levy rates to the assessed value to calculate the final bill.

Personal property assessment forms go out in January and are due by March 1. Late filings bring penalties from $15 to $105 under RSMo 137.280. The Hancock Amendment in the Missouri Constitution limits total revenue a taxing entity can collect. If values jump during a reassessment year, levy rates must roll back to keep collections within the cap.

St. Louis County Tax Assessment Appeals

St. Louis County has a well-documented appeal process. If you believe your property is overvalued, start by contacting the assessor to discuss the value informally. If that does not resolve the issue, file a formal appeal with the Board of Equalization. The board reviews your evidence and makes a decision.

If the board does not lower your value, you can take the case to the Missouri State Tax Commission. You must file within 30 days of the board's mailing date. The commission has specific rules. Failure to state specific facts or law upon which your application for review is based will result in summary denial under Section 138.432 of the Missouri Revised Statutes. You need substantial and persuasive evidence that your property is overvalued. Multiple legal decisions from the State Tax Commission involve St. Louis County properties, covering both commercial and residential appeals.

While your appeal is pending, disputed taxes are held by the collector. Once the case is resolved, taxes are disbursed pursuant to court order under Section 139.031.8.

Note: St. Louis County is separate from the City of St. Louis, which is an independent city and not part of any county.

Pay St. Louis County Property Taxes

St. Louis County property taxes are due by December 31 each year. Tax statements go out in November. You can pay in person at the collector's office in Clayton, by mail, or online. The county collector handles tax payments for all municipalities within St. Louis County, including cities like Florissant.

Processing fees apply to online and credit card payments. The county does not keep these fees. Missouri law requires a paid personal property tax receipt for vehicle plate renewals. The collector issues these receipts. If you miss the December 31 deadline, interest and penalties start on January 1. The postmark date on a mailed check determines whether your payment is on time.

The Missouri Association of Counties lists all St. Louis County offices with contact details. The Missouri Department of Revenue offers a Property Tax Credit for qualifying seniors and disabled individuals, with a max credit of $1,100 for homeowners. The Missouri State Assessors Association keeps a statewide directory of assessor offices.

Cities in St. Louis County

St. Louis County has dozens of municipalities. Property taxes for all of them are collected by the St. Louis County Collector. Here are major cities with dedicated pages.

Nearby Counties

These counties border St. Louis County in eastern Missouri. Each has its own assessor and collector for property tax records.