Property Taxes in Hartline, Washington
Median Hartline, Washington effective property tax rate: 0.84%, significantly lower than the national median of 1.02%, and lower than the Washington state median of 0.92%.
Median Hartline, Washington home value: $67,095
Median annual Hartline, Washington tax bill: $440, $1,960 lower than the national median property tax bill of $2,400.
How are property taxes in Grant calculated?
Property taxes in Hartline, 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 Hartline's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Hartline, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
How Does the Hartline Property Tax Calculator Work?
Use this Hartline property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Hartline's median effective tax rate of 0.84% — based on actual property records in Grant County — to generate your estimate.
Enter your property's estimated assessed value — the figure the local assessment system uses to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies Hartline'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 Hartline: rates are 440 in 99135, 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 Hartline.
About Hartline Property Taxes
About Property Taxes in Hartline, Grant, Washington
Hartline’s median effective property tax rate of 0.84% 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 that vary by subdivision throughout the city.
Property tax rates are not uniform across Hartline. Homeowners in the 99135 ZIP code carry a median effective rate of 0.84%, while those in the same ZIP code also pay 0.84%. This reflects how school district boundaries and local assessment districts are drawn across Grant County. Understanding where your home is located can make a meaningful difference to your annual tax bill.
Hartline homeowners who believe their assessed value is too high can file a formal appeal with the Grant County Tax Assessor before July 1, 2026.
If your estimated bill 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 Hartline, 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 Hartline's effective property tax rate to other cities in Washington and the median property tax rates in Washington and the U.S.
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 Hartline Tax Rate
0.84%
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
1.27%
Property Tax Rates Across Hartline, Grant County, Washington
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 99135 | 0.82% | 0.82% | 0.84% | 1.11% | 1.24% |
Source: Ownwell
Property Tax Assessment Values Across Hartline, Grant County, Washington
When examining property taxes in Hartline, 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. The Grant County appraisal district 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, assessment notices are sent in the spring each year. They'll typically reach your mailbox by the middle of the month when notices are sent.
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. For example, the median home price in Hartline is $67,095, with tax bills ranging significantly across the county. 99135 has the highest median home price at $67,095.
Property Tax Assessment Values Across Hartline, Grant County, Washington
Source: Ownwell
$24,000
$127,565
$231,130
Median Hartline Market Value
$67,095
Median Grant County Market Value
$160,157
Median Washington Market Value
$501,600
Median United States Market Value
$274,101
Property Tax Assessment Values Across Hartline, Grant County, Washington
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 99135 | $3,150 | $4,028 | $67,095 | $118,840 | $212,018 |
Source: Ownwell
Property Tax Bills Across Hartline, Grant County, Washington
Property tax bills in Hartline are based on the assessed value of a home and the local tax rate set by taxing authorities in Grant County. When a property’s assessed value rises, the tax bill can increase as well, even if the homeowner has not made any changes to the home. The median home price in Hartline is $67,095, which helps explain why many tax bills in the area are lower than national levels.
The typical property tax bill in the area is $440.00, and the highest and lowest median tax bill are both $440.00 in ZIP code 99135. That is far below the national median property tax bill of $2,400 and also below the national median property tax rate of 1.02%. For homeowners, this means property taxes are a smaller part of housing costs, but they still depend on how the home is assessed and how local rates are applied.
Median Hartline Tax Bill
$440
Median Grant County Tax Bill
$1,689
Median Washington Tax Bill
$4,512
Median United States Tax Bill
$3,209
Property Tax Bills Across Hartline, Grant County, Washington
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 99135 | $39 | $46 | $440 | $969 | $1,730 |
Source: Ownwell
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | July 1 |
| Tax Bill | |
| Issued | February 10 |
| Due Date #1 | April 30 |
| Due Date #2 | October 31 |
Links | |
|---|---|
| Grant Tax Assessor | |
| Website | grantwa-taxsifter.publicaccessnow.com |