- Typical home value
- $564,600Middle value2020–2024
- Typical yearly tax
- $4,556Middle payment2020–2024
- Tax compared with value
- 0.8%Statewide2025
- Home value used for taxes
- 100%Of estimated sale priceUsual county rule
Washington appeal deadline
File by July 1 of the year your home is valued, or 30 days after your county mails its value notice, whichever is later. Some counties, including King, allow 60 days. Online deadlines start when the county sends the notice or tells you it is available.
How to appeal
Check your home's record
Gather your value notice, property ID, and sales or condition records. Ask the Assessor about errors.
File a county appeal
Explain the value you believe is correct. File with your county Board of Equalization by the deadline.
Request a state review
Appeal to the state Board of Tax Appeals within 30 days of the county's mailed decision.
Match your evidence to the right date. The county generally values your home as of January 1. Choose sales and condition records that help show what it was worth then.
Keep your filing deadline. Talking to the Assessor does not replace filing an appeal on time.
Washington appeal questions
How does the county value my home?
The county estimates what your home could sell for. It generally uses that full amount as the value for calculating taxes. Some properties have special rules.
Can I appeal just because my tax bill went up?
An appeal challenges the value the county put on your home. A higher bill alone does not show that value is wrong; explain why your home was worth less.
What evidence can help?
Recent sales of similar homes, a professional appraisal, and photos or repair estimates can support a lower value. Your county guide explains what to prepare.
Can I file my appeal online?
Check your county's filing instructions. King County offers an online form for its properties. Use the form and submission method approved by your own county.
Should I keep paying taxes during an appeal?
Yes. Pay when they are due. If your appeal lowers the property's value, you may receive a refund or credit from the county.
Check your property's potential savings
Enter your address for a free property tax estimate.
Official Washington resources
Find your county
Local deadlines, filing instructions, and official resources. Start with your county.
Or select from major counties
County guides in Washington
No published guide matches that search. Try another county name or clear the search.
Guide prepared by LowerTheTax.
Sources and data notes
We check statewide filing rules against Washington law and official appeal instructions. County exceptions are identified separately; detailed local instructions belong in the county guide. The links and data notes below show the sources used for this review.
Sources checked October 5, 2026. The home value and yearly tax figures are medians, meaning the middle values: half are above and half are below. They are not averages or estimates of your own home's value or tax bill.
- Census QuickFacts: Washington: median value of owner-occupied housing units, 2020–2024.
- Census ACS 2024 five-year table B25103: (data file): Washington median real estate taxes paid, $4,556. This is a survey estimate for owner-occupied homes, not a bill calculated from the median home value.
- 2025 Washington Property Tax Statistics, p. 91: statewide effective rate of 0.8%, rounded as published. Effective rates express taxes as a share of market value rather than assessed value.
- Washington's market-value assessment rule
- January 1 valuation date
- County petition rules and deadlines: King County's real property petition specifies its 60-day notice period.
- King County forms and online filing
- DOR county appeal guide: Assessor review, petitions, comparable sales, and supporting evidence. Read alongside current county instructions and state rules.
- State Board of Tax Appeals: residential appeals: further appeal, evidence, court review, and tax payments.
- County Assessor and Treasurer directory