Issaquah, King County, Washington Property Taxes
Property Taxes in Issaquah, Washington
Median Issaquah, Washington effective property tax rate: 0.83%, significantly lower than the national median of 1.02%, and lower than the Washington state median of 0.92%.
Median Issaquah, Washington home value: $1,031,000
Median annual Issaquah, Washington tax bill: $9,132, $6,732 higher than the national median property tax bill of $2,400.
How are property taxes in King calculated?
Property taxes in Issaquah, 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 Issaquah's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Issaquah, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
Issaquah, King County, Washington Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
0.83%
Estimate Property Tax Bill
$8,557
$7,941
$774
Average Annual Tax Savings
How Does the Issaquah Property Tax Calculator Work?
Use this Issaquah property tax calculator to estimate your annual tax bill. Enter your property's assessed value and our calculator applies Issaquah's median effective tax rate of 0.83% — based on actual property records in King County — to generate your estimate.
Enter your property's estimated assessed value — the figure the local assessor uses to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies Issaquah'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 Issaquah: rates range from $7,732 in 98029 to $9,551 in 98027, primarily due to differences in school district levies and local assessment districts.
If your estimate is higher than expected, Ownwell can appeal your Issaquah assessment — you only pay if we save you money.
About Issaquah Property Taxes
About Property Taxes in Issaquah, King, Washington
Issaquah’s median effective property tax rate of 0.83% is lower than the Washington state median of 0.92% and lower than the national median of 1.02%. This rate reflects the King 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 Issaquah. Homeowners in the 98027 ZIP code carry a median effective rate of 0.83%, while those in 98029 pay 0.83%. This spread — 0.00 percentage points across the same city — reflects how school district boundaries and local assessment districts are drawn across King County. Understanding which part of Issaquah you live in can make a meaningful difference to your annual tax bill.
Issaquah homeowners who believe their assessed value is too high can file a formal appeal with the Tax Assessor before the July deadline each year.
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 Issaquah, King 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 Issaquah'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 Issaquah Tax Rate
0.83%
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 King County Tax Rate
0.99%
Median Effective Washington Tax Rate
0.92%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across Issaquah, King County, Washington
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 98027 | 0.82% | 0.82% | 0.83% | 1.01% | 1.03% |
| 98029 | 0.82% | 0.82% | 0.83% | 0.83% | 0.83% |
| 98077 | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
$774
Average Annual Tax Savings
Save on Your Property Taxes and More With Ownwell
Property Tax Assessment Values Across Issaquah, King County, Washington
When examining property taxes in Issaquah, 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. King 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 King County, assessment notices are sent in July each year. They'll typically reach your mailbox by the middle of July.
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. By providing insights into how assessed and market values are determined, this section helps property owners navigate their tax responsibilities and understand the valuation processes affecting their property taxes in Issaquah.
For example, the median home price in Issaquah is $1,031,000, with tax bills ranging significantly across the county. 98027 has the highest median home price at $1,052,000.
Property Tax Assessment Values Across Issaquah, King County, Washington
Source: Ownwell
$275,000
$3,858,750
$7,442,500
Median Issaquah Market Value
$1,031,000
Median King County Market Value
$774,000
Median Washington Market Value
$501,600
Median United States Market Value
$235,294
Property Tax Assessment Values Across Issaquah, King County, Washington
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 98027 | $454,000 | $728,000 | $1,052,000 | $1,351,000 | $1,700,000 |
| 98029 | $422,000 | $582,000 | $943,000 | $1,415,000 | $1,758,000 |
| 98077 | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
$774
Average Annual Tax Savings
Save on Your Property Taxes and More With Ownwell
Property Tax Bills Across Issaquah, King County, Washington
Property tax bills in Issaquah are based on the assessed value of a home and the local tax rates set by taxing districts in King County. With a median home price of $1,031,000, homeowners can face substantial annual property taxes, especially when market values rise faster than assessed values are updated. The tax bill reflects both the home’s assessed value and the levies applied to it, so two similar homes can still receive different bills depending on location and exemptions.
For many homeowners, the result is a bill that can feel higher than expected. The 25th percentile tax bill is $5,427, the 75th percentile is $11,848, and the 90th percentile is $14,687. Ownwell can help homeowners lower their property tax bills by reviewing assessments, identifying savings opportunities, and filing appeals when a home is overassessed. By challenging an unfair assessment, Ownwell helps ensure homeowners do not pay more than their fair share.
Median Issaquah Tax Bill
$9,132
Median King County Tax Bill
$7,644
Median Washington Tax Bill
$4,512
Median United States Tax Bill
$2,400
Property Tax Bills Across Issaquah, King County, Washington
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 98027 | $3,518 | $6,059 | $9,551 | $11,909 | $14,771 |
| 98029 | $3,230 | $4,744 | $7,732 | $11,708 | $14,615 |
| 98077 | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
$774
Average Annual Tax Savings
Save on Your Property Taxes and More With 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 | |
|---|---|
| King Tax Assessor | |
| Phone | (206) 296-7300 |
| Website | blue.kingcounty.com |
| assessor.info@kingcounty.gov | |