That's the typical savings when a Washington homeowner appeals successfully. Our tool cites your county's RCWs, calculates your filing deadline, and builds the petition — in under an hour.
Preview free · $49 for full appeal package · All 10 WA counties · No subscription
Your generated petition (example for King County)
Enter your assessed value and the median $/sqft in your neighborhood. We'll tell you if you look over-assessed and when your window closes.
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Ideal comps: arms-length sales within 12 months, within 1 mile, within 20% of your square footage. Pull them from your county parcel viewer, Zillow, or Redfin.
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What you actually get
Every property-tax package delivers a county-specific BOE petition, a comparable-sales evidence packet, a hearing-prep brief, and an assessor-complaint path. Here's a King County appeal.
To the Board of Equalization,
Pursuant to RCW 84.40.030 (true and fair value) and the appeal rights codified at RCW 84.40.038 and RCW 84.48.010, I petition for review of the 2026 assessed value of the above parcel, currently valued at $1,284,000.
The comparable-sales analysis, the square-footage discrepancy, the supported valuation range, and the hearing-ready evidence are set out below…
Evidence checklist
Escalation path
Names, addresses, parcel numbers, and valuations are illustrative. Your petition uses your actual parcel details and your county's specific filing rules and deadlines.
If your assessment is meaningfully above recent comparable sales in your neighborhood, an appeal is usually worth the filing time. Washington County Boards of Equalization (BOEs) hear homeowner appeals directly — no attorney required. That said, this tool is a self-help document generator, not legal advice. For commercial property, condemnation, or high-value disputes, consult a Washington-licensed attorney or property tax consultant.
Under RCW 84.40.038, the later of July 1 of the assessment year OR 60 days from the date the county mailed your Change of Value notice. Most homeowners have until July 1. A "good cause" exception exists for limited circumstances like documented illness or military deployment.
Depends on how over-assessed you are. A 10% reduction on a $750,000 assessment at a typical 1.0% effective rate saves ~$750/year — and since assessments carry forward, that compounds across multiple years until the next reassessment cycle. Appeals backed by 3+ solid comparable sales succeed at materially higher rates than comps-free petitions.
No. County Boards of Equalization hear appeals from homeowners directly. Hearings are informal. The BOE is required to be independent of the assessor. You just need a well-documented petition and a few comparable sales — which is exactly what this tool generates.
Stripe delivers the appeal package to the email on your receipt within minutes. You get the RCW-cited petition as a PDF, county-specific filing instructions (which form, where to send it, any fees), an evidence checklist, and a BOE hearing prep script. No account, no login, no subscription.
Ownwell charges a contingency fee (25–30% of first-year savings) and is built for national scale, not Washington specifics. AppealDesk is a generic $49 template. We're $49 flat, Washington-only, and the petition cites the actual RCWs and WACs the BOE expects to see.
You have 30 days from the BOE's written decision to appeal to the Washington State Board of Tax Appeals (BTA) under RCW 84.08.130. You can choose the Informal track (final, no further appeal) or the Formal track (on the record, appealable to Superior Court). The package includes the BTA appeal template as an escalation path.
The BOE is required to review the petition on its merits — the assessor cannot retaliate with a higher assessment in response to a good-faith appeal. In practice, BOEs that find evidence of under-assessment can raise the value, but this is rare and only happens when the petitioner's own evidence clearly shows higher comparable values, which is generally not how appeals are structured.
You may still qualify for a "good cause" late petition under RCW 84.40.038(1)(b) — documented illness, military deployment, death in the family, or a late-mailed Change of Value notice are the usual grounds. The package includes a late-petition request template with the "good cause" showing. For next assessment year, mark July 1 on your calendar now.
No. Every field you fill in stays on your device — the tool runs entirely in your browser. We never send your parcel number, property address, assessed value, or comparable sales to any server. Close the tab and it's gone.
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