Washington Property Tax Appeal — 2026 Guide
Deadline varies by county — check your county's appraisal district.
| Deadline | Varies — RCW 84.40.038(1) |
|---|---|
| Lien date | |
| Appeal body | County Board of Equalization (BOE) |
| Primary form | Taxpayer Petition to the County Board of Equalization for Review of Real Property Valuation Determination |
| Portal | Varies by county |
| Can value increase | Yes — review body can increase value |
How to Appeal Your Property Tax Assessment in Washington
The general appeal process in Washington:
- Meet the deadline: File a Taxpayer Petition with the county Board of Equalization by July 1 of the assessment year, OR within 30 days of the date the assessor mailed the change-of-value notice (some counties adopt an extended window of up to 60 days by ordinance), whichever is later. Confirm the exact window with the Board of Equalization in the county where the property is located.
- File a appeal: Contact your county's BOE or file online through your county's online portal.
- Gather evidence: Market analysis, recent comparable sales, and documentation of property defects or errors.
- Attend your hearing: Present your evidence to the County Board of Equalization.
- Escalate if needed: After the initial hearing, consider County Board of Equalization (BOE) — file a Taxpayer Petition (Form 64-0075) by the later of July 1 or 30/60 days from the notice (RCW 84.40.038).
Evidence and Hearing Tips
Strong evidence for a Washington property tax appeal typically includes comparable sales data, a recent licensed appraisal, and documentation of any property defects or errors in your assessment record.
Hearings are conducted by the County Board of Equalization (BOE). Most appeals are resolved informally before a formal hearing.
General Property Tax Appeal Questions
- Is it worth appealing my property taxes?
- How do I appeal/protest my property taxes?
- When is the property tax appeal deadline in my state?
- What evidence do I need for a property tax appeal?
- Can my taxes go up if I appeal?
- Will appealing lower my home's resale value?
- How do I find comps for a property tax appeal?
- How much can I save by appealing?
- Do I need a lawyer to appeal property taxes?
- Why did my assessed value go up so much?
- What's the difference between market, assessed, and taxable value?
- What should I say at the hearing?
- How do I appeal property taxes without a lawyer?
- How much do tax protest companies charge?
- What goes in a property tax appeal letter or template?
- Can I appeal if I just bought the house?
- What if my square footage on the record is wrong?
- What happens at a property tax appeal hearing?
- I missed the deadline — what can I do now?
- What is the property tax appeal success rate?