Travis Bunn
Founder, AppealDesk · Published March 27, 2026 · Updated August 25, 2026
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Updated August 2026
Oregon taxes real property on two different numbers, and confusing them is the single most common mistake homeowners make before they appeal. Real Market Value, or RMV, is the assessor's estimate of what your home would sell for, required to sit at 100% of that estimate under ORS 308.232. Assessed Value, the number your tax rate is actually applied against, is a different figure entirely, capped by Measure 50, the 1997 ballot measure that limits your home's Maximum Assessed Value, or MAV, to no more than a 3% increase over last year's figure, under ORS 308.146. Your actual Assessed Value is whichever is lower, RMV or MAV. In a market where prices climb faster than 3% a year, and most of Oregon has for most of the last two decades, those two numbers drift apart, and Assessed Value often ends up sitting well below Real Market Value for anyone who has owned their home more than a few years.
That gap is not a technicality. If your Assessed Value is already capped below your Real Market Value, appealing RMV downward can leave your tax bill, and your monthly escrow payment, completely unchanged, because the number the county actually taxes never moved. Your county mails the tax statement carrying all three figures no later than October 25, and you have only until December 31 to petition, a shorter and later window than most states in this series. Meanwhile your mortgage servicer runs its own clock. Under Regulation X, 12 CFR 1024.17, it analyzes your escrow account once a computation year regardless of what is happening at the assessor's office, paying whatever bill the county's roll produces, appeal pending or not.
Check your property record and relevant sales, then confirm the current local appeal window.
Every Oregon property carries three numbers on the assessment roll. Real Market Value (RMV) is the assessor's opinion of full market value, required by ORS 308.232 to sit at 100% of that estimate. Maximum Assessed Value (MAV) is a separate, statutorily controlled ceiling: under ORS 308.146, it can rise no more than to 103% of last year's Assessed Value, or 100% of last year's MAV, whichever is greater. Your actual Assessed Value (AV), the number your tax rate is multiplied against, is simply whichever of RMV or MAV is lower. MAV only resets to current market value when specific events happen: new construction or improvements, a subdivision or partition, a rezoning paired with a change in use, previously omitted property being added to the roll, or a loss of exemption. A change of ownership is not on that list. If you buy a home in Oregon, you inherit the seller's MAV trajectory, not a fresh number tied to your purchase price, which surprises buyers used to states that reset value at sale.
This is why an Oregon appeal can be pointless even when the assessor's RMV genuinely looks too high. If your AV has been sitting well below RMV for years, because MAV has been capped at 3% growth while the neighborhood's market value climbed faster, knocking RMV down in an appeal does not touch your AV at all. Your tax bill is calculated from AV, and AV was already the lower number before you filed anything. The appeal only changes what happens later, if RMV keeps falling toward MAV, or stays flat long enough for MAV's 3% creep to catch up. Appealing helps right now only when AV and RMV are close together or equal, which usually means a newer home where MAV was recently reset by new construction, a home in a market that has been flat or falling, or a property where a data error, wrong square footage, a phantom improvement, inflated RMV enough to push it below the current AV cap. Before you spend an evening building comparable sales, pull your most recent tax statement and compare the RMV and AV lines side by side. If AV is meaningfully lower than RMV, ask whether this year's appeal will do anything besides feel satisfying.
Oregon's appeal calendar starts later than most states covered in this series. Your assessment date is January 1, but the county does not have to mail your tax statement, carrying that year's RMV, MAV, and AV, until October 25 under ORS 311.250. From there, the ladder has four possible stops:
Stop at the Board and you typically have an answer by mid-April, still inside the same July-to-June tax year your statement covered. Escalate to Tax Court and there is no comparable backstop. A Magistrate Division case can run months, and a Regular Division appeal, full civil litigation with de novo review, can run past a year.
Review the notice, filing instructions, and evidence requirements before ordering a packet.
Federal law runs on its own schedule, one that has nothing to do with your county's fiscal year. Under Regulation X, 12 CFR 1024.17(c)(3), your mortgage servicer must analyze your escrow account once every twelve-month computation year set by your loan, not by Oregon's assessment calendar. That analysis pays whatever bill the treasurer sends, built off whatever is currently on the roll. Oregon's assessment year runs by calendar, January 1, but the tax year is a fiscal year running July 1 through June 30, so a roll stamped 2025 covers the tax year that started July 1, 2025 and stays the operative roll all the way through June 30, 2026, regardless of what month your appeal happens to resolve in.
If your case stays inside the Property Value Appeals Board and you get a decision by that April adjournment deadline, the correction usually reaches the county's records well before the fiscal year closes on June 30, meaning your servicer's next scheduled analysis, or an off-cycle one you request, has a real shot at catching the new number before a full extra cycle passes. If your case goes to the Magistrate Division and then the Regular Division, there is no such backstop. A Tax Court case still open the following October means your servicer has already funded at least one more full tax year at the disputed value, and your escrow account has no way of knowing a case is even pending.
Say a homeowner in Washington County finishes building a new home and moves in that summer. Because new construction resets Maximum Assessed Value under ORS 308.146, her first tax statement shows MAV landing at almost exactly the assessor's Real Market Value, which the county set at Oregon's median, $397,000. There is no cap gap yet for MAV to hide behind. At Oregon's 0.87% effective rate, that is roughly $3,454 in annual property tax, or about $288 a month if spread evenly across an escrow payment. (Rates vary by taxing district, so treat this as illustration, not a quote.) She believes the assessor leaned on builder cost data instead of finished comparable sales, and pulls three recent sales of similar new construction nearby supporting a value closer to $360,000. She files her petition with the Property Value Appeals Board before December 31.
Compare that to a homeowner three doors down who has owned her home for eleven years. Her RMV also gets corrected downward at PVAB, by a similar percentage, but her Assessed Value had already been capped by Measure 50 for years and was sitting thousands of dollars below her old RMV before she ever filed. Her tax bill, and her escrow payment, do not move at all. Same Board, same hearing, same percentage RMV reduction, completely different outcome, because one homeowner's AV had room to fall and the other's did not.
Check the taxable value, exemptions, and applicable dates before estimating a possible tax reduction.
Whichever level rules in your favor, and only when your AV actually moves, the mechanics of getting that savings into your monthly payment are federal, not Oregon-specific. The assessor updates the roll, the county issues a corrected tax statement, and none of that changes your mortgage payment until your servicer sees it. Three provisions of 12 CFR 1024.17 control what happens next:
Do not assume your servicer is tracking your PVAB docket or your Tax Court case. Nobody in an escrow department is watching Oregon Tax Court filings on your behalf. The corrected statement from your county treasurer is the document that actually moves your payment, so keep a copy of the Board's order or the court's judgment alongside the revised statement, and send both the moment they arrive.
The highest-volume appeal jurisdictions in Oregon are Multnomah, Washington, Clackamas, Lane, and Marion counties. Multnomah County's board has used the Property Value Appeals Board name since the July 2024 rename, though some older county pages and forms elsewhere in the state still say Board of Property Tax Appeals or BOPTA, the same body under its previous name. Filing portals, forms, and local scheduling differ by county even though the statewide December 31 petition deadline and the federal escrow rules apply everywhere, so confirm procedure with your specific county's PVAB clerk before you file.
Check your most recent tax statement first. If your Assessed Value is already sitting well below your Real Market Value, thanks to Measure 50's 3% annual cap on Maximum Assessed Value under ORS 308.146, correcting RMV downward may not change your Assessed Value or your tax bill at all this year. Appealing tends to help when RMV and AV are close together or equal, not when years of the cap have already pushed AV well below market.
Real Market Value (RMV) is the assessor's estimate of full market value, set at 100% under ORS 308.232. Maximum Assessed Value (MAV) is a separate ceiling that can grow no more than 3% a year over last year's Assessed Value, under ORS 308.146. Your actual Assessed Value (AV), the figure your tax rate applies to, is whichever of RMV or MAV is lower.
Legally, no. Oregon renamed the county-level board the Property Value Appeals Board (PVAB) effective July 1, 2024, under legislation that directed the substitution of the old name throughout state statutes. Some county pages, older forms, and long-time filers still use Board of Property Tax Appeals or BOPTA out of habit. Both names refer to the same body and the same December 31 petition deadline.
No. Your servicer pays whatever bill the county treasurer's roll produces, and while your petition is open, the roll still carries the value from your October tax statement. Nothing about a pending Oregon appeal changes what escrow pays that cycle. The correction only reaches your payment after the Board rules, the county issues a corrected statement, and your servicer processes it at an analysis.
No. Unlike states that reassess to market value at every sale, Oregon's Measure 50 cap follows the property, not the owner. A change of ownership is not one of the events, new construction, subdivision, rezoning, or added omitted property, that resets Maximum Assessed Value under ORS 308.146. You inherit the seller's MAV trajectory, which can leave a large gap between your purchase price and your Assessed Value, and can also mean an appeal based on your purchase price does nothing if AV is already capped well below it.