Douglas County property tax appeal 2027: deadline, forms and how to file
To appeal a Douglas County assessment, file with the Douglas County Board of Equalization by mail, by email or in person; in Washington the deadline is July 1 or 30 days after the Change of Value Notice is mailed, whichever is later (60 days in some counties, such as King). Confirm the exact date on your notice or with the assessor; we add each county's 2027 date here when it is published.
Change of Value Notices have been mailed in the fall (Sept 20, 2023; Sept 27, 2024; Oct 28, 2022; Nov 26, 2021; Oct 12, 2020), per the BOE page
Data as of 20 Oct 2026 · Douglas County Board of EqualizationCheck your own assessment
Free. We compare the value on your notice with recent sales of similar homes nearby and tell you whether an appeal is worth filing. Have your assessment notice and tax bill handy.
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How to file in Douglas County
- Step 1
File the appeal
Use the method your notice lists, usually Form 64 0075, by the deadline on the notice.
- Step 2 · before the hearing
Prepare and submit your evidence
The assessor’s value is presumed correct; you need specific market evidence that it is wrong (WAC 458-14-046). “Taxes are too high” or a large percentage increase is not enough. Use comparable sales from the last five years, adjusted to January 1 (sales closest to that date count most), a recent appraisal, photos and repair estimates (WAC 458-14-087). Ask the assessor for the comparable sales it used; it must provide them at least 21 business days before your hearing, and new evidence from either side is due 21 business days before it (WAC 458-14-066).
- Step 3
Meet, then hear
An talk to the assessor with County Assessor comes first; if you decline the offer, the Douglas County Board of Equalization hears the case. Most reductions happen at the first step.
Before you file: how to read your notice · evidence that works · informal vs formal hearing · when not to appeal
Forms
| Form | Number | Use | Format |
|---|---|---|---|
| Taxpayer Petition to the County Board of Equalization for Review of Real Property Valuation Determination | 64 0075 | The statewide petition. Give your opinion of value and the market evidence behind it; attach the notice if you file after July 1. | |
| Informal Property Tax Appeal (Board of Tax Appeals) | — | Only if you appeal the county board’s decision to the State Board of Tax Appeals. Attach the board’s order. | |
| Real Property Petition Form Application (DOR Form 64 0075, hosted by Douglas County) | 64 0075 | Real property valuation petition; county-hosted copy of the DOR form | |
| 2026 Value for 2027 Taxes Board of Equalization Packet (Real Property) | — | Douglas County appeal packet with filing instructions and petition for the 2026 assessment year | |
| Waiver of Late Filing Request | — | Request to waive the filing deadline for good cause (RCW 84.40.038, WAC 458-14-056) | |
| Petition Withdrawal Request | — | Withdraw a filed petition |
Appeal levels
| Level | Who hears it | Deadline | Cost |
|---|---|---|---|
| Talk to the assessor | County Assessor | Any time; it does not extend the petition deadline | Free |
| Board of Equalization | Douglas County Board of Equalization | July 1, or 30–60 days after the notice, whichever is later | Free |
| Board of Tax Appeals | Washington State Board of Tax Appeals | 30 days after the county board’s decision is mailed | Free |
What evidence the board accepts
The assessor’s value is presumed correct; you need specific market evidence that it is wrong (WAC 458-14-046). “Taxes are too high” or a large percentage increase is not enough. Use comparable sales from the last five years, adjusted to January 1 (sales closest to that date count most), a recent appraisal, photos and repair estimates (WAC 458-14-087). Ask the assessor for the comparable sales it used; it must provide them at least 21 business days before your hearing, and new evidence from either side is due 21 business days before it (WAC 458-14-066).
Douglas County questions
When is the Douglas County appeal deadline for 2027?
July 1 or within 30 days of the Change of Value Notice mailing date, whichever is later. Douglas County mails notices in the fall, so the 30-day window ends roughly 30 days after the fall mailing (for example notices mailed Oct 28, 2022 had a Nov 28, 2022 deadline). Check the deadline printed on your value notice.
How do I appeal my assessment in Douglas County?
Send petition Form 64 0075 (or the county’s approved version) to the Douglas County Board of Equalization, P.O. Box 747, Waterville, WA 98858.
What evidence does the board accept?
Market evidence: comparable sales from the last five years adjusted to January 1, a recent appraisal, photos and repair estimates. The assessor’s value is presumed correct, and saying taxes are too high is not grounds for a change.
Can I see the assessor’s comparable sales?
Yes. Ask the assessor; it must give you the sales and valuation data it used at least 21 business days before your hearing (WAC 458-14-066). Your own new evidence is due by the same point.
How do I contact the Douglas County Assessor's Office?
Mail: Douglas County Board of Equalization, P.O. Box 747, Waterville, WA 98858. Phone: 509-745-8537. Hours and walk-in details: douglascountywa.gov.
What if I disagree with the board’s decision?
Appeal to the State Board of Tax Appeals within 30 days after the board’s decision is mailed. There is no filing fee, and late appeals are dismissed.
Check whether yours is over-assessed
Nearby counties
Grant County · Chelan County · Okanogan County · Lincoln County · Kittitas County · Ferry County · Adams County
- Douglas County Board of Equalization
- 2026 Douglas County BOE Packet (Real Property)
- Douglas County BOE FAQ
- Douglas County Assessor
- Real Property Petition Form (county-hosted)
- RCW 84.40.038 — Petition to the county board of equalization
- RCW 84.40.045 — Notice of change in valuation
- WAC 458-14-066 — Exchange of valuation information
- WAC 458-14-087 — Evidence of value
- RCW 84.08.130 — Appeals to the Board of Tax Appeals
- Washington DOR — Appeal my property assessment
- Board of Tax Appeals — Residential property appeals
- U.S. Census Bureau, county population estimates (2024) and county gazetteer (2024).