Gasconade County homeowners pay a median of $1,315 a year in property tax on a median home value of $179,900. Its effective tax rate (property taxes paid as a share of home values, per the Tax Foundation) is 0.63%, the 63rd highest of 115 Missouri counties. The Gasconade County Assessor sets the market value of every home in Gasconade County as of January 1 of each odd-numbered year. Your taxable value is 19% of that value. The Gasconade County Board of Equalization hears appeals.
Closed for 2026The 2026 Board of Equalization deadline passed on July 13, 2026. The State Tax Commission deadline was September 30, 2026, or 30 days after your board decision, whichever is later. If your board decision is dated September 21, 2026 or later, you may still have time: file with the STC within 30 days of that decision. If you bought your home after June 13, 2026, or never got a timely notice of an increase, you may be able to appeal straight to the STC by December 31, 2026 (or within 30 days after the county first sends you the tax bill, if later). The next window opens with the 2027 reassessment: notices by mid-June 2027, and board appeals due Monday, July 12, 2027.
File your appeal with the county Board of Equalization by the second Monday in July. In most counties you file it with the county clerk. St. Louis County and Jackson County take appeals through their Board of Equalization office, mostly online, and in St. Louis City you file with the assessor's office. The board may choose to extend the time, but do not count on that. Example: Boone County's 2026 appeal form says it must be postmarked by Monday, July 13, 2026, and Clay and Johnson counties used the same date. In Greene County, the last day for 2025 appeals was July 14, 2025. If you bought your home within 30 days before that deadline or later in the year, you may be able to appeal straight to the State Tax Commission by December 31 (or within 30 days after the county first sends you the tax bill, if that is later).
Phone: 573-486-3100
Email: [email protected]
Address: 119 E. First Street, Rm. 23, Hermann, MO 65041
County Assessor: Julia Baker
County website: gasconadecounty.org (look for the county assessor page)
This office values your home, keeps your property record, mails notices when your value goes up and holds informal reviews before the board deadline.
If the assessor raises your value, the assessor must notify you, by June 15 under the notice statutes. The notice tells you how and by when to appeal. If your value did not go up, you usually get no notice, but you can still appeal. In reassessment years, some counties also send an estimate of the tax the increase may cause.
Look up your home on the Gasconade County Assessor website and check square footage, bathrooms, condition and features. Mistakes are the easiest wins. Use our record card checklist.
Get the Board of Equalization appeal form from the Gasconade County clerk or the county's Board of Equalization page (in St. Louis City, from the Gasconade County Assessor). Some large counties take appeals online. Return it with your evidence by the second Monday in July. If you lose, appeal to the State Tax Commission by September 30 or within 30 days of the board's decision, whichever is later.
An appraisal by a state-certified or licensed appraiser. At the STC, the appraiser must attend the hearing, or the report is not accepted.; Your purchase contract and closing statement, if you bought in the last two or three years in a normal sale; Sales of truly comparable nearby homes, with size, age, lot and room details (not just asking prices or listings); Written repair or construction estimates for defects. Photos alone do not prove value..
At the Board of Equalization, the law says there is no presumption that the assessor's value is correct. The assessor must prove the value is not above market value in St. Louis County and St. Louis City, and in any county when your value rose 15% or more for reasons other than new construction or improvements. At the State Tax Commission, you must prove the value you ask for with substantial and persuasive evidence. Your own opinion alone usually carries little weight.
Next step: State Tax Commission of Missouri (STC). September 30 of the tax year, or 30 days after the Board of Equalization decision, whichever is later. The STC cannot extend this deadline. For 2026 appeals that meant September 30, 2026, unless the board's decision came after August 31. File a Complaint for Review of Assessment online at stc.mo.gov (preferred), by email to [email protected], or by mail to P.O. Box 146, Jefferson City, MO 65102. Upload a copy of the board's decision letter. Do not send evidence yet; the STC will tell you when. There is no filing fee. A hearing officer may hold a prehearing conference and then an evidentiary hearing by WebEx or in your county. The hearing is like a short trial (about an hour for a home): the rules of evidence apply and you can cross-examine the assessor's witnesses. Within 30 days of the hearing officer's decision, you can ask the three commissioners to review it. After that, you can seek review in court.
Enter the market value on your assessment notice and what you think the home would really sell for. We estimate the yearly saving if the board agrees with you.
Some states cap how fast the taxable value of a home can rise (California, Florida, Michigan and Texas homesteads, for example). If your taxable value is already held below market value by a cap, a lower market value may not lower this year's bill.
Fill in your details and download a written appeal statement as a PDF or Word file. Most boards also require their own appeal form: file the form and attach this letter and your evidence to it.
Tax Appeal Map is a free information site, not a law firm or appraiser. The letter is a template, not legal advice.
File your appeal with the county Board of Equalization by the second Monday in July. In most counties you file it with the county clerk. St. Louis County and Jackson County take appeals through their Board of Equalization office, mostly online, and in St. Louis City you file with the assessor's office. The board may choose to extend the time, but do not count on that. Example: Boone County's 2026 appeal form says it must be postmarked by Monday, July 13, 2026, and Clay and Johnson counties used the same date. In Greene County, the last day for 2025 appeals was July 14, 2025. If you bought your home within 30 days before that deadline or later in the year, you may be able to appeal straight to the State Tax Commission by December 31 (or within 30 days after the county first sends you the tax bill, if that is later).
File with the Gasconade County Board of Equalization by the second Monday in July. In most counties you file through the county clerk; some large counties take appeals online, and in St. Louis City you file through the assessor's office. Then appeal to the Missouri State Tax Commission if needed.
Phone 573-486-3100.
No fee.
Contact details change; call or check the office website before you visit.