Rate Breakdown

Property taxes in Grant County are calculated by multiplying the assessed value (minus exemptions) by the total local millage rate.

How Property Tax Works in Grant County

Property taxes in Grant County are determined by two primary factors: the Assessed Value (AV) of the property and the combined millage rate. The Grant County Assessor determines the AV based on the Real Market Value (RMV) of the property, which is the price the property would likely sell for on the open market. Due to Oregon's Measure 5 and Measure 50 laws, the assessed value is often lower than the market value and is capped at a maximum annual growth rate of 3%.

Millage rates represent the tax rate per $1,000 of assessed value. A "mill" is one-thousandth of a dollar. The total millage rate for your specific property is the sum of local levies, including the county government, city services, school districts, and special districts (such as fire or water). To calculate your tax, the assessed value is multiplied by the total millage rate and then divided by 1,000.

Available Exemptions

Oregon offers several programs to reduce the tax burden on eligible homeowners. While these do not always eliminate taxes entirely, they can significantly lower the amount owed:

• Homeowner Property Tax Deferral: Available to senior citizens (60+), surviving spouses, or individuals with disabilities, allowing them to defer payment of property taxes.
• Disabled Veterans Exemption: Certain veterans with a service-connected disability may be eligible for a partial or full exemption from property taxes.
• Agricultural Deferrals: Land used primarily for farming or forestry may qualify for special assessment status, reducing the taxable value of the acreage.

Payment Schedule & Deadlines

Property taxes in Grant County are typically billed annually, though payment options may vary. It is critical to adhere to the following schedule to avoid penalties:

• Billing Cycle: Tax statements are generally mailed by the county treasurer in the fall.
• Deadlines: Payments are typically due in installments (often November 1st and February 1st), though some taxpayers may choose to pay in full.
• Late Consequences: Payments made after the deadline are subject to interest penalties. If a property remains delinquent for an extended period, it may be subject to a tax foreclosure process.

Appealing Your Assessment

If you believe your property's Assessed Value does not accurately reflect its market value, you have the right to appeal. The process begins with the Grant County Board of Property Tax Appeals (BOPTA). You must file a formal appeal within the designated window—typically between January 1st and April 1st—following the delivery of your Notice of Assessed Value. You will be required to provide evidence, such as recent sales of comparable properties or an independent appraisal, to support your claim for a lower valuation.