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Grand Coulee, Grant County, Washington Property Taxes

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Property Taxes in Grand Coulee, Washington

  • Median Grand Coulee, Washington effective property tax rate: 1.01%, significantly lower than the national median of 1.02%, and lower than the Washington state median of 0.92%.

  • Median Grand Coulee, Washington home value: $45,771

  • Median annual Grand Coulee, Washington tax bill: $409, lower than the national median property tax bill of $2,400.

How are property taxes in Grant calculated?

Property taxes in Grand Coulee, Washington are calculated based on the tax assessed value, which is often lower than the actual market value due to property tax exemptions such as the homestead or senior exemption.

Understanding Grand Coulee's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Grand Coulee, knowing local tax details benefits homeowners and investors.

Last Updated April 13, 2026

Grand Coulee, Grant County, Washington Property Tax Bill Calculator

$100,000

$1,500,000

$3,000,000

Median Effective Tax Rate

1.01%

Estimate Property Tax Bill

$462

$429

How Does the Grand Coulee Property Tax Calculator Work?

Use this Grand Coulee property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Grand Coulee's median effective tax rate of 1.01% — based on actual property records in Grant County — to generate your estimate.

Enter your property's estimated assessed value — the figure the local appraisal district uses to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies Grand Coulee's median effective rate across all local levies, providing a more accurate estimate than applying a single county millage rate.

Your bill may vary by ZIP code within Grand Coulee: rates range from 1.01% in 99133 to 1.01% in 99133, primarily due to differences in school district levies and local assessment districts.

For a more precise estimate, scroll down to explore ZIP code-level tax rate trends across Grand Coulee.

About Grand Coulee Property Taxes

About Property Taxes in Grand Coulee, Grant, Washington

Grand Coulee's median effective property tax rate of 1.01% is lower than the Washington state median of 0.92% and lower than the national median of 1.02%. This rate reflects the Grant County base levy combined with local school district levies and Local improvement districts (LIDs) that vary by subdivision throughout the city.

Property tax rates are not uniform across Grand Coulee. Homeowners in the 99133 ZIP code carry a median effective rate of 1.01%, while those in 99133 pay 1.01%. This spread — 0 percentage points across the same city — reflects how school district boundaries and local assessment districts are drawn across Grant County. Understanding which part of Grand Coulee you live in can make a meaningful difference to your annual tax bill.

Grand Coulee homeowners who believe their assessed value is too high can file a formal appeal with the local Tax Assessor before July 1, 2026.

If your estimated bill above seems higher than expected, Ownwell can review your assessment and protest on your behalf. You only pay if we save you money.

Property Tax Rates Across Grand Coulee, Grant County, Washington

As noted earlier, local government entities set tax rates, which can vary widely within a state.

Why? Because annually, each county estimates its required budget to provide services and divides that by the total value of all taxable property within its jurisdiction. This calculation results in the property tax rate.

While there are votes and laws involved in setting tax rates and budgets, in a nutshell, this is the annual process.

Below, you can compare Grand Coulee's effective property tax rate to other cities in Washington and the median property tax rates in Washington and the U.S.

Property Tax Rates Across Grand Coulee, Grant County, Washington

Source: Ownwell

0.84%

1.06%

1.29%

Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.

Median Effective Grand Coulee Tax Rate

1.01%

Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.

Median Effective Grant County Tax Rate

1.12%

Median Effective Washington Tax Rate

0.92%

Median Effective United States Tax Rate

1.02%

Property Tax Rates Across Grand Coulee, Grant County, Washington

Zip10th Percentile25th PercentileMedian Tax Rate75th Percentile90th Percentile
991330.89%0.92%1.01%1.68%3.33%

Source: Ownwell

Property Tax Assessment Values Across Grand Coulee, Grant County, Washington

When examining property taxes in Grand Coulee, Washington, understanding the distinction between market value and assessed value is crucial.

The market value is what a willing buyer would pay to a willing seller in an open and competitive market, often influenced by location, property condition, and economic market trends. Grant County estimates the market value for tax purposes.

The assessed value is the market value minus any applicable exemptions or limits determined by local laws and offerings. The tax assessed value is the figure used to calculate your property taxes or the amount multiplied by your tax rate to get your tax bill.

Assessment notices in Grant County are sent in the spring each year and typically reach your mailbox by the middle of the month. Each property owner receives an assessment notice that contains both the market value and assessed value, along with an estimate of your property tax bill.

The median home price in Grand Coulee is $45,771, and the median tax bill is $409, far below the national median property tax bill of $2,400 and national median property tax rate of 1.02%. Tax bills range across the county, with ZIP code 99133 showing the highest median home price at $45,771.

Property Tax Assessment Values Across Grand Coulee, Grant County, Washington

Source: Ownwell

$24,000

$127,565

$231,130

Median Grand Coulee Market Value

$45,771

Median Grant County Market Value

$160,157

Median Washington Market Value

$501,600

Median United States Market Value

$235,294

Property Tax Assessment Values Across Grand Coulee, Grant County, Washington

Zip10th Percentile25th PercentileMedian Home Price75th Percentile90th Percentile
99133$3,000$8,650$45,771$107,051$189,732

Source: Ownwell

Property Tax Bills Across Grand Coulee, Grant County, Washington

Grand Coulee property tax bills are based on the assessed value of a home and the local tax rate set for Grant County. When a home’s market value changes, the assessed value can change too, which can raise or lower the tax bill. Local levies and taxing districts also affect the final amount homeowners owe.

For Grand Coulee, the median home price is $45,771, and the median property tax bill is $409.00. That is well below the national median property tax bill of $2,400 and the national median property tax rate of 1.02%. Tax bills in the city can vary widely: the 25th percentile is $126, while the 75th percentile is $950 and the 90th percentile is $1,655.

For homeowners, this means property taxes can be a meaningful part of housing costs, even in a lower-priced market. Understanding how the assessed value and local rates work can help homeowners better anticipate what they may owe each year.

Property Tax Bills Across Grand Coulee, Grant County, Washington

Source: Ownwell

$248

$1,365

$2,482

Median Grand Coulee Tax Bill

$409

Median Grant County Tax Bill

$1,689

Median Washington Tax Bill

$4,512

Median United States Tax Bill

$2,400

Property Tax Bills Across Grand Coulee, Grant County, Washington

Zip10th Percentile25th PercentileMedian Tax Bill75th Percentile90th Percentile
99133$87$126$409$950$1,655

Source: Ownwell

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Frequently Asked Property Tax Questions in Grand Coulee, Washington

How are property taxes calculated in Grand Coulee, Washington?
Property taxes in Grand Coulee, Washington are calculated by multiplying your property's assessed value by the applicable tax rate set by local taxing authorities. The assessed value is determined by the county assessor and may differ from your property's market value depending on local assessment ratios and exemptions.
How do I appeal my property taxes in Grand Coulee, Washington?
To appeal your property taxes in Grand Coulee, Washington, you typically need to file a formal protest or appeal with your local appraisal district or assessor's office by the stated deadline. You'll need evidence such as comparable sales, a recent independent appraisal, or documentation of property condition issues. Ownwell can handle this entire process for you.
What property tax exemptions are available in Grand Coulee, Washington?
Common property tax exemptions in Grand Coulee, Washington include homestead exemptions for primary residences, senior citizen exemptions, veteran exemptions, and disability exemptions. Exemption amounts and eligibility requirements vary by county. Contact your local appraisal district or check Ownwell for details specific to your property.
When are property taxes due in Grand Coulee, Washington?
Property tax deadlines in Grand Coulee, Washington vary by county but typically include an assessment notice period in spring or early summer, followed by an appeal deadline, and a tax payment due date in the fall or winter. Check with your county assessor's office for specific dates in your area.
How can Ownwell help reduce my property taxes in Grand Coulee, Washington?
Ownwell provides professional property tax appeal services in Grand Coulee, Washington. Our team analyzes your assessment, gathers evidence, files all paperwork, and represents you at hearings — all with no upfront cost. You only pay a percentage of your savings if we successfully lower your tax bill.