Grant County, WA Property Tax: $2,268/yr (2026)
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The effective property tax rate in Grant County is 0.82% of assessed home value. On a home at the county median value of $275,700, that works out to about $2,261 per year, or $188 per month. Grant County is located in central Washington, and is home to approximately 100,428 residents.
About Grant County
Grant County covers approximately 2,679.5 square miles in Washington. The county is home to about 100,428 residents living in roughly 39,496 housing units, of which 57.3% are owner-occupied. The median household income is $71,115, and the median home was built in 1987.
Grant County borders Adams County, Benton County, Douglas County, Franklin County, Kittitas County — useful comparisons if you're considering nearby areas with potentially different tax rates.
How Property Taxes Work in Washington
Property taxes in Washington are administered at the county level. Each county sets a millage rate applied to the assessed value of real property — the effective rate above accounts for any partial assessments and exemptions already built into the local tax base. Assessed value can differ meaningfully from current market value depending on how often the county reassesses and what fraction of market value it uses.
Most counties in Washington offer exemptions that reduce the taxable assessed value: homestead exemptions for primary residences, senior exemptions, disability exemptions, and veteran exemptions are common. These reduce your effective rate below the county-wide average shown here. Contact the Grant County Assessor's office to learn which exemptions apply to your property and when to file.
Grant County vs. Neighboring Counties
| Location | Eff. Rate | Median Home | Annual Tax |
|---|---|---|---|
| Grant County, WA | 0.82% | $275,700 | $2,261 |
| Washington state average | 0.76% | — | $2,095* |
| Adams County | 0.84% | $251,300 | $2,104 |
| Benton County | 0.79% | $369,400 | $2,910 |
| Douglas County | 0.79% | $402,900 | $3,168 |
| Franklin County | 0.76% | $345,700 | $2,638 |
| Kittitas County | 0.71% | $459,900 | $3,255 |
| US national average | 1.10% | $281,900 | $3,101 |
*State average annual tax computed at Grant County's median home value of $275,700. Source: US Census ACS 2023 5-year estimates.
Frequently Asked Questions
How does Grant County's property tax rate compare to the rest of Washington?
At 0.82%, Grant County is higher than the Washington state average of 0.76%. On a home at the county median of $275,700, that means about $2,261 per year — versus $2,095 at the state average rate, a difference of $166 per year. Compared to the national average of 1.10%, Grant County is below average.
What's a typical annual property tax bill in Grant County?
For a home at the county median value of $275,700, the annual property tax in Grant County is approximately $2,261 — or about $188 per month. For a home worth $413,550, expect around $3,391 per year. For a $551,400 home, approximately $4,521 per year. Use the calculator above to estimate taxes for any assessed value.
Where do I appeal a Grant County property tax assessment?
Property assessment appeals in Grant County are handled by the Grant County Assessor's office. Most jurisdictions require filing within 30–90 days of receiving your assessment notice — confirm the specific deadline with the assessor's office before submitting, as deadlines and procedures vary by county. A successful appeal can reduce your assessed value and lower your tax bill for the current and future tax years.
What exemptions are available in Grant County?
Washington counties commonly offer homestead exemptions for owner-occupied primary residences, senior citizen exemptions for qualifying homeowners aged 65 and older, exemptions for disabled residents, and veterans' exemptions. Each exemption reduces your assessed taxable value, which in turn reduces your effective tax rate below the county-wide 0.82% shown here. Contact the Grant County Assessor's office to confirm which exemptions are available and the application deadlines.
Data sources: US Census Bureau ACS 2023 5-Year Estimates, US Census Gazetteer (2024), County Adjacency File