Property Tax Appeal Kit (King County)

Your Seattle property tax appeal packet, built from your own assessor record.

The Board of Appeals & Equalization gives you 60 days from your value notice — or July 1, whichever is later — to file. This kit assembles your deadline, your assessment at a glance, comparable-sale and equity evidence, and a draft petition you file free via eAppeals.

$79 one-time · 10-page sample · In minutes

Get the Property Tax Appeal Kit (King County)

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Photo: American Craftsman-style home at a Seattle house, Seattle — Guywelch2000 — CC BY 4.0

Inside this dossier

A 10-page sample, chapter by chapter.

The chapter index of your report — the real table of contents from the sample, rebuilt for your address at purchase.

Cover1
Report disclaimer2
Executive summary4
Your filing deadline4
Your assessment at a glance5
Comparable-sale evidence5
What the Board will and will not hear6
Characteristics sanity check6
Draft petition, ready to file7
How to file (fee-free)7
What would change this verdict8
Worked examples from real Seattle lots8
Next steps8
Sources9
Before you rely on this3
Next step: the full study10

Sample pages

How it reads, page by page.

Your evidence packet — three pages from the sample PDF, generated from a real Seattle address. Your copy is built from your own parcel.

Download the full sample PDF

Method & sources

Methodology: where every figure comes from.

Every figure follows the same methodology — live public records or a dated constant, marked ★ official or ◇ estimate.

King County Assessor eReal Property recordassessed land/improvements/total, tax roll, levy code, sale history
Nearby parcel assessor recordsrecent comparable sales within the neighborhood
RCW 84.40.038the 60-day / July 1 filing deadline
King County Board of Appeals & EqualizationeAppeals filing and petition requirements

Worked examples

Real Seattle lots, run through this report.

One Seattle address measured with the same engine, so you can see how the analysis lands on a lot like yours.

Worked example 1 · Licton Springs

Comparable sales support a reduction

Appraised total: $772,000
Comparable sales found: 0
Levy rate: 9.9 ◇ / $1,000
Filing deadline: 60 days from the mailing date on your 2025 notice

King County values this Licton Springs lot at $772,000, and 0 nearby comparable sales point lower, so there is a moderate market-value case. The kit pulls the parcel's own assessor record and builds the evidence packet from those sales, arguing for about $null. File the draft petition free through eAppeals before your deadline — 60 days from the mailing date on your 2025 notice. The Board hears market-value evidence only, so attach the sales and let them carry the argument. A corrected characteristic in the county record would only strengthen the request.

Questions, answered

Before you order.

When is my deadline?

Petitions must be filed by July 1 of the assessment year or within 60 calendar days of the date your Official Property Value Notice was mailed — whichever is later. Enter your notice date in the form and the kit computes the exact due date.

Does this guarantee a reduction?

No. This is a self-service evidence packet and draft petition, not an appraisal or a guarantee. It gives you the parcel-specific evidence — sale history, equity, and comparables — that the Board actually weighs.

Do I need to hire someone to file?

No. Filing is free through King County's eAppeals portal, and the kit includes a pre-filled draft petition. You represent yourself, or hand the packet to a licensed representative.

Read first — free

The free Seattle guides behind this report.

Everything this report measures is explained for free first. Read the guide, decide whether you still want it measured for your own address.

The King County appeal deadline and the comps that winThe 60-day math and the evidence the Board actually reads.
Why a Seattle tax bill rises when values fallThe levy rate, and the one lever a homeowner has.

All Seattle DADU & property guides

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Need the full picture?

This report answers one question. The $149 Customized Feasibility Report covers zoning, setbacks, trees, critical areas, utilities, fees and a permit path — reviewed by a person before it reaches you.