Cornelius, Washington County, Oregon Property Taxes

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Property Taxes in Cornelius, Oregon

Median Cornelius, Oregon effective property tax rate: 0.86%, significantly lower than the national median of 1.02%, and lower than the Oregon state median of 0.87%.
Median Cornelius, Oregon home value: $436,870
Median annual Cornelius, Oregon tax bill: $3,819, $1,419 higher than the national median property tax bill of $2,400.

How are property taxes in Washington calculated?

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

Last Updated April 13, 2026

Cornelius, Washington County, Oregon Property Tax Bill Calculator

Property Assessed Value

$100,000

$1,500,000

$3,000,000

Median Effective Tax Rate

0.86%

Estimate Property Tax Bill

$3,757

$3,486

How Does the Cornelius Property Tax Calculator Work?

Use this Cornelius property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Cornelius's median effective tax rate of 0.86% — based on actual property records in Washington 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 Cornelius'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 Cornelius: rates range from $3,812.00 in 97113 to $6,222.00 in 97124, 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 Cornelius.

About Cornelius Property Taxes

About Property Taxes in Cornelius, Washington, Oregon

Cornelius’s median effective property tax rate of 0.86% is lower than the Oregon state median of 0.87% and lower than the national median of 1.02%. This rate reflects the Washington County base levy combined with local school district levies and special assessment districts that vary by subdivision throughout the city.

Property tax rates are not uniform across Cornelius. Homeowners in the 97124 ZIP code carry a median effective rate of 1.01%, while those in 97113 pay 0.86%. This spread — 0.15 percentage points across the same city — reflects how school district boundaries and local assessment districts are drawn across Washington County. Understanding which part of Cornelius you live in can make a meaningful difference to your annual tax bill.

Cornelius homeowners who believe their assessed value is too high can file a formal appeal with the local Tax Assessor before the December 31, 2026 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 Cornelius, Washington County, Oregon

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 Cornelius's effective property tax rate to other cities in Oregon and the median property tax rates in Oregon and the U.S.

Property Tax Rates Across Cornelius, Washington County, Oregon

Source: Ownwell

0.58%

0.95%

1.33%

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 Cornelius Tax Rate

0.86%

Median Effective Washington County Tax Rate

0.95%

Median Effective Oregon Tax Rate

0.87%

Median Effective United States Tax Rate

1.02%

Property Tax Rates Across Cornelius, Washington County, Oregon

Zip	10th Percentile	25th Percentile	Median Tax Rate	75th Percentile	90th Percentile
97113	0.66%	0.78%	0.86%	0.93%	1.00%
97124	0.93%	0.96%	1.01%	1.04%	1.06%

Source: Ownwell

Property Tax Assessment Values Across Cornelius, Washington County, Oregon

When examining property taxes in Cornelius, Oregon, 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 Washington 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 Washington County, assessment notices are sent in the fall each year. They'll typically reach your mailbox by the middle of October.

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 Cornelius.

For example, the median home price in Cornelius is $436,870, with tax bills ranging significantly across the county. 97124 has the highest median home price at $614,970.

Property Tax Assessment Values Across Cornelius, Washington County, Oregon

Source: Ownwell

$290,450

$643,180

$995,910

Median Cornelius Market Value

$436,870

Median Washington County Market Value

$545,280

Median Oregon Market Value

$450,850

Median United States Market Value

$235,294

Property Tax Assessment Values Across Cornelius, Washington County, Oregon

Zip	10th Percentile	25th Percentile	Median Home Price	75th Percentile	90th Percentile
97113	$100,166	$382,580	$435,190	$521,000	$621,060
97124	$531,618	$568,482	$614,970	$671,882	$715,918

Source: Ownwell

Property Tax Bills Across Cornelius, Washington County, Oregon

Cornelius property tax bills are calculated based on the assessed value of a home and the local tax rates set by taxing authorities in Washington County. The bill is determined by multiplying the assessed value by the applicable tax rate, so homes with higher assessed values generally face larger tax bills. Factors such as neighborhood, property characteristics, and local levies can also affect the final amount.

For Cornelius homeowners, this means property taxes can vary widely even among similar homes. The median home price is $436,870, and the 25th percentile tax bill is $3,267, while the 75th percentile tax bill is $4,674. At the high end, the 90th percentile tax bill reaches $5,693, showing how quickly costs can rise. ZIP code differences are also notable, with the highest median tax bill at $6,222 in 97124 and the lowest median tax bill at $3,812 in 97113.

Property Tax Bills Across Cornelius, Washington County, Oregon

Source: Ownwell

$1,720

$5,743

$9,766

Median Cornelius Tax Bill

$3,819

Median Washington County Tax Bill

$5,108

Median Oregon Tax Bill

$3,806

Median United States Tax Bill

$2,400

Property Tax Bills Across Cornelius, Washington County, Oregon

Zip	10th Percentile	25th Percentile	Median Tax Bill	75th Percentile	90th Percentile
97113	$1,911	$3,260	$3,812	$4,638	$5,595
97124	$5,487	$5,775	$6,222	$6,599	$7,038

Source: Ownwell

Don't miss the deadline to appeal!

Dates
Appeal Deadline	December 31

Links
Washington Tax Assessor
Website	washcotax.co.washington.or.us

Frequently Asked Property Tax Questions in Cornelius, Oregon

How are property taxes calculated in Cornelius, Oregon?

Property taxes in Cornelius, Oregon 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 Cornelius, Oregon?

To appeal your property taxes in Cornelius, Oregon, 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 Cornelius, Oregon?

Common property tax exemptions in Cornelius, Oregon 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 Cornelius, Oregon?

Property tax deadlines in Cornelius, Oregon 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 Cornelius, Oregon?

Ownwell provides professional property tax appeal services in Cornelius, Oregon. 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.