Rob Hartley

Founder, AppealDesk · March 11, 2026

From $1.05M to $738K: A Portland Homeowner's $5,648/Year Overassessment

Updated March 2026 · 10 min read

The Numbers at a Glance

The Situation

Portland's SW hills neighborhood sits above downtown with views, mature trees, and home values that have swung dramatically over the past few years. During the pandemic-era boom, prices in this area surged past $1 million for properties that previously traded in the $700K-$800K range.

The market has since corrected. But the county's assessment had not.

When the assessment notice arrived showing $1,052,250, the homeowner knew something was off. The homes selling on their street were going for significantly less. The question was whether the data would back up that instinct.

It did -- by $314,212.

Understanding Oregon's Assessment System

Oregon has one of the more unusual property tax systems in the country, thanks to Measure 50 (passed in 1997). Here is how it works:

• Two values on your tax bill: Real Market Value (RMV) and Maximum Assessed Value (MAV). You are taxed on the lower of the two.
• MAV grows at a maximum of 3% per year under Measure 50, regardless of actual market changes
• RMV should reflect actual market value -- and this is where overassessments happen
• When RMV drops below MAV, you are taxed on RMV -- making it critical that RMV is accurate

In this case, the RMV of $1,052,250 was the controlling value. If it were corrected to $738,038, the tax savings would be immediate and substantial.

The Evidence: 3 Comparable Sales

Portland's SW hills present a challenge for comparable sales analysis: the homes vary widely in size, lot, view, and condition. Finding true comparables requires careful matching.

Three strong comparable sales were identified, all meeting the core criteria:

• Located in the same SW Portland area
• Sold within the past 12 months
• Similar in size, style, and lot characteristics
• Arms-length transactions at full market exposure

The median sale price of these comparables came in at $738,038 -- roughly 70 cents on the dollar compared to what the county claimed the property was worth.

Three comps may sound like a small sample, but in a neighborhood where homes are highly individual, three well-matched sales carry more weight than fifteen loosely matched ones from miles away. Quality over quantity is what review boards look for.

Why Portland Assessments Overshoot

Several factors contributed to this $314,212 gap:

• Pandemic-era peak pricing: Multnomah County's mass appraisal models captured the 2021-2022 price spike. Many of those peak valuations have not been corrected.
• Market correction lag: Portland's real estate market cooled significantly in 2023-2025, but assessment models update on a schedule that often trails reality by 12-18 months.
• Unique property premium: Assessment algorithms sometimes over-apply neighborhood-level appreciation to individual properties that did not benefit equally from the boom.
• Low protest rate: Oregon homeowners appeal far less frequently than Texas or Illinois homeowners, so inflated values persist unchallenged.

The Appeal Process in Multnomah County

Oregon's appeal process runs through the county Board of Property Tax Appeals (BoPTA):

1. File a petition with BoPTA by December 31 (or within 90 days of the tax statement if your value changed)
2. Submit comparable sales evidence supporting your proposed Real Market Value
3. Attend a hearing (typically January-March) where you present your case in person or via evidence
4. Receive a decision -- if denied, you can appeal to the Oregon Tax Court (Magistrate Division)

The key is presenting a clear, evidence-based case. BoPTA members see hundreds of petitions. A well-organized packet with relevant comparable sales, adjusted for differences, stands out immediately.

What $5,648/Year Means for This Homeowner

At nearly $500 per month in excess taxes, the financial impact is significant:

• 1 year: $5,648 saved
• 3 years: $16,944 saved
• 5 years: $28,240 saved
• 10 years: $56,480 saved

For a $49 evidence packet, the return on investment is 115x in the first year. Even a partial reduction -- say the board meets halfway and lowers the value by $157,000 -- still yields $2,824 in annual savings.

Lessons for Portland Homeowners

• Check your RMV every year. Oregon law requires the county to set RMV at actual market value. If the market has dropped, your RMV should drop too. If it has not, you may be overpaying.
• Do not assume the county corrects itself. Mass appraisal models are blunt instruments. They work well in subdivisions with identical homes but struggle in neighborhoods with diverse housing stock.
• A 30% overassessment is not unusual. In rapidly shifting markets, the gap between assessed and actual value can be dramatic. This is not an edge case.
• Oregon's Measure 50 system makes it more complex, not less important. Understanding the interplay between RMV and MAV is crucial. When RMV exceeds actual market value, you need evidence to bring it down.

The Bottom Line

A Portland homeowner was paying taxes based on a $1,052,250 valuation when comparable homes in the same neighborhood were selling for $738,038. The 29.9% overassessment translated to $5,648 in excess taxes every year -- $56,480 over a decade.

The market data was clear. The county's number was wrong. It just needed someone to compile the evidence and present it.