Clark County, WA Property Tax Appeal Deadline 2026

Washington assessors revalue property every year, and the Clark County Board of Equalization is the independent board that hears value disputes. Washington is a market-value state: the question before the board is what your home was actually worth on the January 1, 2026 assessment date — and the evidence that carries weight is recent sales of comparable homes around Vancouver, Camas and Battle Ground, not comparisons of other properties' assessed values.

You file REV 64-0075 (Taxpayer Petition to the County Board of Equalization) with the Clark County Board of Equalization. The deadline is the later of July 1, 2026, or 60 days after your value notice was mailed, and a timely postmark counts (RCW 84.40.038). Filing fee: $0 — no filing fee (statewide).

• Washington petitions must be complete to be accepted — parcel number, the assessor's value, your own estimate of value, and your specific reasons and evidence all belong on the form — and documents are filed in duplicate.

How to appeal in Clark County — step by step

1. 1

   Find the date on your Official Property Value Notice

   Your personal deadline is the later of July 1, 2026, or 60 days after the notice was mailed — the mailing date printed on the notice is what starts the clock.

2. 2

   Gather comparable sales

   Recent sales of similar homes (size, age, neighborhood) close to the January 1, 2026 assessment date are the core of a Washington appeal. The board weighs market sales — not your neighbors' assessed values.

3. 3

   Complete the petition fully

   REV 64-0075 (Taxpayer Petition to the County Board of Equalization) must be complete to be accepted: parcel number, the assessor's value, your own estimate of value, your specific reasons and supporting evidence, and your signature. File the documents in duplicate.

4. 4

   File by your deadline

   The deadline is jurisdictional — a timely postmark counts, but a late petition is generally out. If in doubt, file first and supplement your evidence later within the board's rules.

5. 5

   Exchange evidence before the hearing

   Submit all of your evidence at least 21 business days before the hearing date — the assessor must do the same for you.

6. 6

   Keep paying your tax bill

   Filing a petition does not pause your property tax. Pay when due; if the board lowers your value, the difference comes back to you.

Frequently asked questions

• When is the deadline to appeal property taxes in Clark County in 2026?

  The 2026 deadline to petition the Clark County Board of Equalization is July 1, 2026, or 60 days after your Official Property Value Notice was mailed — whichever is later (RCW 84.40.038). Value notices mail on a rolling schedule, so many owners' windows are still open — the date on your own notice controls.

• What does it cost to file?

  Nothing — Washington Board of Equalization petitions are free to file statewide.

• Do I need a lawyer or an appraisal?

  No. Homeowners file and present their own petitions; the hearing is informal and evidence-driven. The burden is on you, though — bring solid comparable sales, because the assessor's value is presumed correct.

• What if both July 1 and my 60-day window have passed?

  The deadline is jurisdictional, and boards can accept late petitions only in narrow circumstances — contact your county Board of Equalization to ask, and set a calendar reminder for next year's value notice either way.

More Washington county deadline guides

• King County
• Pierce County
• Snohomish County
• Spokane County