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Preston, King County, Washington Property Taxes

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Property Taxes in Preston, Washington

  • Median Preston, Washington effective property tax rate: 1.04%, significantly lower than the national median of 1.02%, and higher than the Washington state median of 0.92%.

  • Median Preston, Washington home value: $1,230,000

  • Median annual Preston, Washington tax bill: $12,249, $9,849 higher than the national median property tax bill of $2,400.

How are property taxes in King calculated?

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

Last Updated April 13, 2026

Preston, King County, Washington Property Tax Bill Calculator

$100,000

$1,500,000

$3,000,000

Median Effective Tax Rate

1.04%

Estimate Property Tax Bill

$12,792

$11,871

SAVE WITH OWNWELL

$774

Average Annual Tax Savings

How Does the Preston Property Tax Calculator Work?

Use this Preston property tax calculator to estimate your annual tax bill. Enter your property's assessed value and our calculator applies Preston's median effective tax rate of 1.04% — based on actual property records in King County — to generate your estimate.

Enter your property's estimated assessed value — the figure used to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies Preston'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 Preston: rates range from 1.04% in 98050 to 1.04% in 98050, primarily due to differences in school district levies and local assessment districts. Preston's median effective tax rate is higher than Washington's 0.92% state median and higher than the national median property tax rate of 1.02%. The median property tax bill in Preston is $12,249, which is higher than the national median property tax bill of $2,400.

If your estimate is higher than expected, Ownwell can appeal your Preston assessment — you only pay if we save you money.

About Preston Property Taxes

About Property Taxes in Preston, King, Washington

Preston’s median effective property tax rate of 1.04% is lower than the Washington state median of 0.92% and higher 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 Preston. Homeowners in the 98050 ZIP code carry a median effective rate of 1.04%, while those in 98050 pay 1.04%. This spread — 0 percentage points across the same city — reflects how school district boundaries and local assessment districts are drawn across King County. Understanding which part of Preston you live in can make a meaningful difference to your annual tax bill.

Preston 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 Preston, 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 Preston'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 Preston, King County, Washington

Source: Ownwell

0.63%

0.93%

1.24%

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 Preston Tax Rate

1.04%

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 Preston, King County, Washington

Zip10th Percentile25th PercentileMedian Tax Rate75th Percentile90th Percentile
980500.87%1.02%1.04%1.06%1.09%

Source: Ownwell

Property Tax Assessment Values Across Preston, King County, Washington

When examining property taxes in Preston, 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 King 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 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 Preston.

For example, the median home price in Preston is $1,230,000, with tax bills ranging significantly across the county. 98050 has the highest median home price at $1,230,000.

Property Tax Assessment Values Across Preston, King County, Washington

Source: Ownwell

$275,000

$3,858,750

$7,442,500

Median Preston Market Value

$1,230,000

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 Preston, King County, Washington

Zip10th Percentile25th PercentileMedian Home Price75th Percentile90th Percentile
98050$509,400$738,500$1,230,000$1,660,000$2,021,800

Source: Ownwell

Property Tax Bills Across Preston, King County, Washington

Property tax bills in Preston are calculated by applying the local tax rate to the assessed value of a home, which is based on its market value and the taxing jurisdictions that fund local services. For homeowners in King County, the median home price is $1,230,000, and that value helps shape the final bill. The 25th percentile tax bill is $7,351, while the 75th percentile is $16,912 and the 90th percentile reaches $20,149, showing how quickly taxes can rise as assessed values increase.

What affects a property tax bill? The assessed value, exemptions, and local levy rates all play a role. When a home is overassessed, the bill can be higher than it should be, which can put extra pressure on homeowners.

Ownwell helps homeowners save by reviewing assessments, identifying savings opportunities, and filing appeals when a property is overvalued. That can lower the property tax bill and help homeowners keep more of their money.

Property Tax Bills Across Preston, King County, Washington

Source: Ownwell

$2,643

$24,618

$46,592

Median Preston Tax Bill

$12,249

Median King County Tax Bill

$7,644

Median Washington Tax Bill

$4,512

Median United States Tax Bill

$2,400

Property Tax Bills Across Preston, King County, Washington

Zip10th Percentile25th PercentileMedian Tax Bill75th Percentile90th Percentile
98050$4,581$7,351$12,249$16,912$20,149

Source: Ownwell

Don't miss the deadline to appeal!

Frequently Asked Property Tax Questions in Preston, Washington

How are property taxes calculated in Preston, Washington?
Property taxes in Preston, 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 Preston, Washington?
To appeal your property taxes in Preston, 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 Preston, Washington?
Common property tax exemptions in Preston, 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 Preston, Washington?
Property tax deadlines in Preston, 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 Preston, Washington?
Ownwell provides professional property tax appeal services in Preston, 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.