Oregon Property Taxes Explained: What Portland & Beaverton Homeowners Should Know

From assessed values and market values to local bonds and levies, here's what Oregon homeowners and buyers should understand about their property taxes.

How Do Property Taxes Work in Oregon?

If you've ever looked at your Oregon property tax statement and wondered why your assessed value is so much lower than your home's market value, you're certainly not alone.

Property taxes are one of the more confusing parts of homeownership in Oregon, particularly for buyers relocating from other states or homeowners trying to understand why their annual bill has changed.

Unlike some states, Oregon doesn't calculate property taxes based solely on what your home is currently worth or what you paid for it. Instead, our system uses a combination of assessed values, local tax rates, and voter-approved bonds and levies.

The result is that two homes with similar market values, sometimes even on the same street, can have noticeably different property tax bills.

And perhaps one of the biggest misconceptions? Oregon's well-known 3% property tax rule doesn't necessarily mean your taxes can only increase by 3% each year.

Whether you're buying your first home in Beaverton, preparing to sell in Portland, or simply reviewing your latest tax statement, understanding how this system works can help you make more informed financial decisions.

1. Assessed Value vs. Market Value: What's the Difference?

One of the first things I encourage homeowners to understand is the difference between their property's real market value and its assessed value.

In Oregon, these are two separate numbers, and they serve very different purposes.

Real Market Value (RMV): Your property's real market value is the county assessor's estimate of what the home could reasonably sell for on the open market as of January 1 of the assessment year.

This valuation considers factors such as the property's location, size, condition, features, and comparable market activity.

However, the county's estimated market value isn't necessarily what your home would sell for today. Actual selling prices depend on current market conditions, buyer demand, available competition, and the individual property.

Maximum Assessed Value (MAV): Your maximum assessed value is part of Oregon's property tax limitation system, established through Measure 50 in 1997.

For most existing properties, maximum assessed value can increase by no more than 3% annually, although certain qualifying property changes can trigger exceptions.

Over time, this system has created a substantial difference between the market value and maximum assessed value of many Oregon homes.

Assessed Value (AV): Your assessed value is the number generally used to calculate your property taxes. Under Oregon law, it's the lower of your real market value or maximum assessed value.

Let's look at a simplified example.

Imagine you own a home in Beaverton with the following values:

• Real Market Value: $650,000

• Maximum Assessed Value: $350,000

• Taxable Assessed Value: $350,000

Even though the county estimates the property's market value at $650,000, the assessed value used for property tax calculations is $350,000.

This distinction is one of the most important things to understand about Oregon property taxes, especially when comparing different homes.

2. Why Do Similar Homes in Portland or Beaverton Have Different Property Taxes?

This is a question that comes up frequently when buyers are comparing properties.

You might find two homes in the same Beaverton neighborhood, both listed around $700,000, only to discover that one has a significantly higher annual property tax bill.

At first glance, that can seem strange. If the homes are worth approximately the same amount, shouldn't their taxes be similar?

Not necessarily.

Because Oregon's assessed values are tied to a historical valuation system, two otherwise comparable properties can have very different taxable values.

A home built decades ago may have a maximum assessed value that has increased gradually over many years. A newer property may have a different assessed value established through the rules governing new construction.

Major additions, qualifying renovations, subdivisions, and certain changes in tax status can also affect a property's assessed value.

Local taxing districts are another important consideration. Even homes relatively close to one another may fall within different school, fire, park, or municipal service districts, resulting in different tax rates.

For buyers, this is why I always recommend looking beyond the purchase price when comparing properties. Two homes with similar asking prices can carry different ongoing ownership costs, and those differences deserve attention before making an offer.

3. Does Oregon's 3% Rule Mean Property Taxes Can Only Increase 3% Per Year?

No, and this is one of the most common misunderstandings about Oregon property taxes.

Under Measure 50, the annual growth of a property's maximum assessed value is generally limited to 3%, with certain exceptions. However, that limitation doesn't apply directly to the total amount of property taxes you pay.

Your actual tax bill can increase by more than 3%, even when your maximum assessed value follows the standard annual limitation.

There are several reasons this can happen.

New or increased local taxes: Voter-approved bonds and local option levies can change the taxes charged to properties within a taxing district.

Qualifying property improvements: Certain additions, major renovations, or changes to a property may increase its maximum assessed value beyond the normal annual growth limit.

Changes in exemptions: If a property no longer qualifies for a particular exemption or special assessment, its taxable value or tax obligation may change.

Changes in tax limitations: Oregon's property tax system includes additional limitations under Measure 5. Changes in how these limits affect a property can also influence the final bill.

There's another important distinction. If a property's real market value has fallen below its maximum assessed value, an increase in market value can sometimes produce an assessed-value increase greater than 3%, even without a qualifying improvement.

In its October 2026 property tax announcement, Washington County specifically identified these factors as reasons homeowners may see increases greater than the commonly expected 3%.

The takeaway is that Oregon's property tax system provides certain limits on taxable values, but it doesn't guarantee a fixed annual increase in your total tax bill.

4. How Do Local Bonds and Levies Affect Property Taxes in Portland and Beaverton?

Property taxes in Oregon help fund many of the public services we rely on throughout our communities, including schools, public safety, fire protection, libraries, parks, and other local services.

But not every homeowner pays the same combination of local taxes.

Your total property tax rate depends partly on the taxing districts that serve your specific address. These may include your city, county, school district, regional agencies, and other special districts.

In addition to permanent tax rates, voters can approve other forms of property taxation.

Local Option Levies

Local option levies provide temporary funding for specific public services or programs beyond a district's permanent tax rate.

Depending on the measure, these funds may support services such as schools, public safety, or other local operations.

Because these levies are approved for limited periods, their introduction, renewal, or expiration can affect property tax bills.

General Obligation Bonds

Bonds are commonly used to finance larger capital projects, such as school construction, facility improvements, and other public infrastructure.

When voters approve qualifying general obligation bonds, property taxes may be collected to repay the associated debt.

These bond taxes operate differently from many other property taxes and can contribute to changes in a homeowner's annual bill.

Why Location Matters

For homeowners in Beaverton, Bethany, Cedar Mill, Tigard, Hillsboro, and surrounding Washington County communities, the specific combination of taxing districts can vary considerably.

The same is true throughout Portland, including properties in Multnomah County and other portions of the metro area.

In fact, Washington County reported 360 separate property tax code areas for the 2026–27 tax year, reflecting the different combinations of local taxing districts throughout the county.

This is another reason that comparing your property taxes directly with a friend's or neighbor's doesn't always provide an accurate picture.

Understanding which districts serve your property is just as important as understanding its assessed value.

5. Why Property Taxes Don't Always Rise or Fall With Home Values

Another common question homeowners ask is why their property taxes continue increasing when the real estate market is slowing down or home values are declining.

It seems reasonable to assume that if your home's market value decreases, your property taxes should decrease as well.

But Oregon's system doesn't necessarily work that way.

Because property taxes are generally calculated using assessed value rather than current market value, changes in the broader housing market don't always translate directly into changes on your tax statement.

For example, imagine your home's real market value decreases from $650,000 to $625,000.

If its maximum assessed value remains substantially lower, perhaps around $350,000, the decline in market value may have little effect on the taxable value of the property.

Your maximum assessed value may still increase under Oregon's annual calculation, and your tax bill may increase as well.

However, if a property's real market value falls below its maximum assessed value, the lower market value becomes the assessed value used for taxation.

This is why property values and property taxes don't necessarily move in the same direction.

It's also why I encourage homeowners to separate their property's tax assessment from its actual market position when evaluating a potential sale.

Your property tax statement can provide useful information, but it isn't a substitute for a current market analysis.

6. What Should Buyers Know About Oregon Property Taxes Before Purchasing a Home?

If you're buying a home in Portland or Beaverton, property taxes should be part of your financial planning from the beginning.

They're an ongoing cost of ownership, and depending on the property, they can make a meaningful difference in your monthly housing expenses.

One particularly important thing to understand is that purchasing a home in Oregon does not automatically reset its assessed value to the purchase price.

That differs from the property tax systems in some other states.

However, that doesn't mean a property's current tax bill is guaranteed to remain unchanged after purchase. Qualifying improvements, changes in exemptions, new levies, and other factors can affect future taxes. Before purchasing a home, I recommend reviewing several details.

Review the Current Property Tax Statement

Look at the property's real market value, assessed value, annual taxes, and taxing districts.

Rather than relying solely on the tax figure shown in a real estate listing, review the actual county records for the property.

Understand the Monthly Cost

If your annual property taxes are $6,000, that's approximately $500 per month before accounting for future changes.

For buyers purchasing with a mortgage, property taxes may be included in the monthly payment through an escrow account. It's important to understand how that amount affects your total housing budget.

Ask About Recent Improvements

If the property has undergone significant additions or renovations, consider whether those improvements have been reflected in the current assessment.

Depending on the nature and timing of the work, certain changes may affect future taxable values.

Review Exemptions and Special Assessments

Some properties receive exemptions or special assessments that may not continue under new ownership.

If the current tax bill reflects a benefit that won't apply to you, your future taxes could be different.

Look at the Bigger Financial Picture

Property taxes are only one component of homeownership costs. Insurance, maintenance, utilities, and potential HOA dues should also be considered when comparing properties.

A home with a lower asking price isn't necessarily the more affordable option once all ownership expenses are taken into account.

At Carey Hughes Homes, we believe buyers should have a clear understanding of these details before making one of life's largest financial decisions.

7. How to Read Your Oregon Property Tax Statement

Oregon property tax statements are generally mailed by county tax offices in October, and they contain more information than just the amount due.

Whether your property is in Washington County or Multnomah County, there are several sections worth reviewing each year.

Property Information: Confirm that the address, account information, and property details are accurate.

Real Market Value: Review the county assessor's estimated market value of your property as of the assessment date.

Assessed Value: This is generally the taxable value used to calculate your property taxes.

Taxing Districts: Review the local governments, school districts, and other agencies receiving property tax revenue from your property.

Bond and Local Option Levies: Look for additional voter-approved taxes that may affect your total bill.

Total Taxes and Payment Options: Review the amount due, installment options, deadlines, and any available early-payment discounts.

For the 2026–27 tax year, both Washington County and Multnomah County identify November 16, 2026, as the first property tax payment deadline.

Homeowners who pay their current-year property taxes in full by that deadline may qualify for a 3% discount, while paying two-thirds may qualify for a 2% discount.

If your mortgage lender collects property taxes through escrow, confirm whether the lender is responsible for making the payment. You want to avoid paying twice, but you also want to make sure your taxes are paid on time.

For homeowners who want to review their records online, both counties offer property tax information and statement resources:

• Washington County Assessment & Taxation

• Multnomah County Property Taxes

Taking a few minutes to review your statement each year can help you better understand your ownership expenses and identify changes that may deserve a closer look.

8. Can You Appeal Your Property Tax Assessment in Oregon?

Yes. Oregon property owners generally have the right to appeal certain property values established by the county assessor.

If you believe your property's real market value is incorrect, you may be able to challenge that assessment through your county's Property Value Appeals Board.

However, it's important to understand that a successful appeal of market value doesn't automatically result in lower property taxes.

Because Oregon uses the lower of real market value and maximum assessed value to determine assessed value, a reduction in market value may have no impact on your tax bill if that value remains above your maximum assessed value.

Appeals typically require evidence supporting the property's value as of the applicable January 1 assessment date. This may include an independent appraisal or relevant comparable sales.

For the 2026–27 tax year, the general property value appeal deadline is December 31, 2026.

If you have concerns about your assessment, I recommend contacting your county assessor's office to review the property's valuation and understand the applicable appeal process.

Frequently Asked Questions About Oregon Property Taxes

Are Oregon property taxes based on the purchase price of a home?

No. Oregon property taxes are generally calculated using a property's assessed value, which is the lower of its real market value or maximum assessed value. A home purchase does not automatically reset the property's assessed value to the price paid.

Why are my property taxes higher than my neighbor's in Beaverton?

Similar homes can have different property tax bills because their assessed values may have developed differently over time. Property age, qualifying improvements, exemptions, and applicable taxing districts can all contribute to differences.

Can property taxes increase more than 3% per year in Oregon?

Yes. Oregon's 3% limitation generally applies to maximum assessed value, not the total tax bill. Voter-approved bonds and levies, qualifying improvements, changes in exemptions, and other factors can cause taxes to increase by more than 3%.

Do property taxes decrease when home values fall in Portland?

Not necessarily. If a property's real market value remains above its maximum assessed value, a decrease in market value may not reduce its taxable assessed value. Taxes can continue increasing even when market values decline.

Does buying a house in Oregon trigger a property tax reassessment?

A sale alone does not automatically reset the property's maximum assessed value or establish a new taxable value based on the purchase price. However, changes to the property or its tax status may affect future assessments.

When are Oregon property taxes due?

Oregon property tax payments are generally due in November, with additional installment options available. For the 2026–27 tax year, the first payment deadline is November 16, 2026, in Washington and Multnomah counties. Always verify the dates and payment options on your county tax statement.

Can I challenge my home's assessed value?

Oregon homeowners may appeal certain property values through their county's Property Value Appeals Board. However, reducing the county's estimated real market value won't necessarily reduce the taxable assessed value or annual tax bill.

Understanding Your Property Taxes Is Part of Understanding Your Home's Value

Whether you're buying, selling, or planning to stay in your home for years to come, understanding Oregon's property tax system is an important part of making informed decisions about homeownership.

And while the terminology can feel complicated, the underlying takeaway is fairly straightforward: Your home's market value, assessed value, and property taxes are related, but they aren't interchangeable.

For buyers, understanding those differences can help you more accurately evaluate the cost of a property before making an offer. For current homeowners, it can help explain changes in annual taxes and provide a clearer picture of ongoing expenses.

And for sellers, it's a good reminder that your property's assessed value doesn't necessarily reflect what buyers may be willing to pay in today's market.

After more than 20 years of helping clients buy and sell homes throughout Portland, Beaverton, and the surrounding communities, I've learned how valuable it is to understand the details that affect a home's financial picture.

At Carey Hughes Homes, our goal is to help you navigate those details with clarity and confidence, whether you're preparing for your next move or simply trying to better understand the home you already own.

Have questions about your home's current market value or what to consider when purchasing in Portland or Beaverton? We'd be happy to help you explore your options. Click here to connect.

Thinking About Selling Your Home in 2027?

Understanding your property's taxes and market value is just one part of planning a successful sale. Timing matters, too. If you're considering a move in the coming year, you may want to start preparing sooner than you think.

In our recent blog, we explore why January, February, and March can offer Portland and Beaverton homeowners a competitive advantage before the spring real estate market gets into full swing.

READ NEXT: Best Time to Sell a House in Portland or Beaverton: Why Early 2027 Deserves a Look