Valley County, MontanaProperty records & tax offices
Links open the listed public-office or service-provider website in a new tab. This directory does not collect payments.
Find the right property record
Use the property portal for ownership and assessed value, the collector for a bill or balance, and the map for parcel location. Have the address, owner name, or parcel number ready.
Tax bills & filing dates
These are the dates and qualifications recorded in the directory. Confirm your tax year and current deadline with the official office and your property’s notice.
- Payment deadline
- Tax year 2026 Montana real-property taxes: first payment due by 5:00 p.m. November 30, 2026, or within 30 days of the postmark on the tax notice, whichever is later; second payment due by 5:00 p.m. May 31, 2027. If a due date falls on a weekend or holiday, the next business day applies.
- Assessment appeal
- Submit Montana DOR Form AB-26 within 30 days of the date on the 2025–2026 classification and appraisal notice; if that deadline was missed, informal review or a direct local county tax appeal board appeal was available through June 1, 2026. A property-tax protest must also be filed with the county treasurer and the disputed tax paid under protest by the payment due date. Official process: https://revenue.mt.gov/property/appraisal/appeals-and-reviews.
Exemptions & appeals
View exemption application (opens in a new tab)Exemption filing
The 2026 Montana homestead and long-term-rental reduced-rate enrollment deadline was March 20, 2026, after a state extension. The 2027 enrollment period is May 4, 2026–March 1, 2027. Official application portal: https://revenue.mt.gov/property/property-tax-changes/enroll.
Senior relief
Montana Elderly Homeowner/Renter Credit: age 62 or older by December 31, Montana resident at least nine months, owned/rented/leased a Montana home at least six months, and total household income less than $45,000; refundable credit up to $1,150. File through the Montana DOR TransAction Portal/Form 2 Schedule 2EC. Official information: https://revenue.mt.gov/property/property-tax-help/montana-elderly-homeowner-renter-credit.
Valuation limits
No county-specific annual assessed-value cap was verified. Montana DOR administers the 2025–2026 reappraisal cycle and local taxing jurisdictions set mill levies from certified taxable values. Montana’s 2026 homestead reduced-rate structure is a tax-rate reduction, not an assessed-value cap.
For a valuation appeal, use the appeal date in the tax and filing section above. Keep your notice, supporting evidence, and proof of submission.