Oregon Property Tax Appeal Guide
How to challenge your property tax assessment in Oregon - deadlines, process, and a savings calculator.
What This Data Tells Us About Appeals in Oregon
- Expect $35–$85 (varies by county) when petitioning the County Board of Property Tax Appeals (BOPTA) - later tribunal or court stages may use a different schedule.
- This ACS extract does not store how often Oregon assessments are reduced on appeal; comparable sales and property-record errors are the evidence the named board typically asks for.
- The typical window centers on December; confirm the current county notice date before relying on the statewide summary. Deadline shape differs on Virginia and Nevada.
Primary signal
The filing route can carry a fee
File with the County Board of Property Tax Appeals (BOPTA). The reported filing-fee structure is $35–$85 (varies by county); later court or tribunal stages may use a different schedule.
Decision signal 2
The filing window centers on December
December 31 deadline. Deadlines can vary by county and assessment cycle, so confirm the current date with the local assessor before relying on this guide.
Decision signal 3
Oregon's process has its own procedural details
Oregon limits annual taxable value increases to 3% under Measure 47/50. Real market value and maximum assessed value (MAV) are different concepts, focus on real market value.
Decision signal 4
This extract does not store an appeal-win rate
The ACS county medians on this site do not include how often Oregon assessments are reduced on appeal. Recent comparable sales and documented property-record errors are the evidence boards typically ask for.
How to read this guide and disclaimer
Use the ranked signals above as a preparation order, not as a forecast. Start with the filing window and named appeal body because a strong valuation argument cannot cure a missed deadline or a filing sent to the wrong office. Then compare the assessment with recent, genuinely similar properties and document factual errors such as incorrect square footage, condition, or classification.
An estimated success rate is not part of this ACS extract. Keep copies of the assessment notice, evidence, forms, delivery confirmation, and every response from the taxing authority. If a state rule and a county instruction differ, follow the current instruction issued by the office that will hear the appeal.
This guide is for informational purposes only and is not legal or tax advice. Deadlines, filing fees, and procedures vary by county within Oregon and can change year to year. Always verify the current rules with your local assessor's office, or a licensed attorney or tax professional, before filing. Source: Oregon Department of Revenue.
Appeal calendars beside Oregon
Other state boards, not geography. Use them to see whether Oregon's December window is unusual; start with Virginia and Nevada.
| Peer state | Typical month | Filing fee |
|---|---|---|
| Virginia Also open Virginia appeal steps | December | $0 for Board; filing fee for Circuit Court |
| Nevada Also open Nevada appeal steps | January | $0 |
| South Carolina Also open South Carolina appeal steps | November | $0 |
| Hawaii Also open Hawaii appeal steps | January | $25–$250 (Tax Appeal Court) |
| Alabama Also open Alabama appeal steps | October | $0 |
Appeal Deadline
December 31 deadline
Appeal Body: County Board of Property Tax Appeals (BOPTA)
Step-by-Step Appeal Process
- 1
Review your assessment notice from the county assessor (sent in October)
- 2
File a petition with the county Board of Property Tax Appeals (BOPTA) by December 31
- 3
Attend the BOPTA hearing (held between January and April)
- 4
If denied, appeal to the Oregon Tax Court, Magistrate Division within 30 days
Oregon-Specific Notes
Oregon limits annual taxable value increases to 3% under Measure 47/50. Real market value and maximum assessed value (MAV) are different concepts, focus on real market value.
Source: Oregon Department of Revenue
Estimate appeal savings
After you have Oregon's deadline (December) and filing route (County Board of Property Tax Appeals (BOPTA)), project annual savings if an assessment cut sticks. The shared estimator lives on one tools URL so each state page keeps its own process facts instead of reprinting the same form.
Open appeal savings estimator →