Multnomah County Property Tax Appeal — Deadline & How to File 2026
December 31193 days left to file
Yes — Multnomah County's 2026 property-tax appeal deadline is December 31. 193 days left to file with the Board of Property Tax Appeals (BOPTA).
Is my property over-assessed in Multnomah County?
You're over-assessed when the County's value is higher than what your home would actually sell for — and then you're over-paying every year until you appeal. Oregon appeals to the county Board of Property Tax Appeals (BOPTA) are due December 31 (the tax statements mail in late October), per ORS §309.100.
Honest null: Multnomah County's assessment roll isn't onboarded into our live check yet, so we can't pull your specific over-assessment here. Compare your assessed value to recent nearby sales on the county assessor portal — if it's higher than what your home would sell for, you're over-assessed and should appeal by the deadline above.
How to appeal your Multnomah County assessment — and who files it for you
Pull your current assessed value from the Multnomah County assessor portal.
Find your market value — a recent sale of your home, or comparable nearby sales.
If the County's number is higher, file an appeal with the Board of Property Tax Appeals (BOPTA) by December 31.
Present your comparables (and any appraisal) at the hearing.
Most owners who win use a contingency property-tax appeal firm — it costs nothing unless they cut your bill, then takes a share of the first-year saving. About 95% of over-assessed owners never appeal, so the saving is usually left on the table.
What is the Multnomah County appeal deadline this year?
December 31 — 193 days left.
How much does it cost to appeal?
Usually a small filing fee or none; a contingency firm only charges if it wins a reduction.
I got a reassessment notice — what now?
It's the County's new market-value opinion and the start of your appeal window. Check it; appeal by December 31 if it over-states your home's value.
Will appealing raise my taxes?
In most jurisdictions an appeal can only confirm or lower your assessment for that cycle — but confirm the rules with the Board of Property Tax Appeals (BOPTA) before filing.
Source & verification
against the official Multnomah County / OR deadline (multco.us · ORS §309.100). These are public deadline facts, not legal or tax advice — confirm your exact date with the Board of Property Tax Appeals (BOPTA) and consult a professional before filing.