Snohomish County, WA

Appeal your Snohomish County property assessment

2026 assessment cycle. Updated July 8, 2026.

File your 2026 Snohomish County appeal by August 25, 2026 (60 days after your value notice was mailed). You petition the Snohomish County Board of Equalization, and filing is free. This page covers the steps.

The 2026 deadline

Snohomish County mailed 2026 value notices county-wide on June 26, 2026, which sets the August 25, 2026 deadline: petitions are due 60 days after the mailing date.

If the mailing date printed on your own notice differs, your date plus 60 days governs. Check the notice.

Where to file

File your petition with:

Snohomish County Board of Equalization
3000 Rockefeller Avenue, M/S 409
Everett, WA 98201

How the appeal works

Washington assesses every home at 100 percent of market value as of January 1, revalued every year, with no cap on increases (RCW 84.40.030). An appeal argues the assessed value is higher than the market supports.

You petition the Snohomish County Board of Equalization on the state Department of Revenue form, the Taxpayer Petition to the County Board of Equalization. Filing is free, and you don't need a lawyer or an agent.

After you file, the Board schedules a hearing. You can appear in person or by phone, or ask the Board to decide on your written petition and evidence. You submit your comparable-sales evidence to the Board on the schedule in your hearing notice.

What Parcel prepares

Parcel prepares the complete appeal packet for your home: the filing form filled in, comparable-property evidence, and a step-by-step guide with this deadline and filing address built in. You preview the numbers for your home before paying anything; the completed packet is a fixed $49.

Start at savewithparcel.com, or look at a sample completed packet first.

Common questions

When is the 2026 deadline?

August 25, 2026 for most homeowners: the county mailed value notices on June 26, 2026, and petitions are due 60 days later. If your own notice shows a different mailing date, that date plus 60 days governs.

What does it cost to file?

Nothing. There is no filing fee. Parcel's completed packet, if you want it, is a fixed $49.

What form do I use?

The statewide Taxpayer Petition to the County Board of Equalization (DOR form REV 64 0075). Parcel's packet includes it filled in for your home.

What evidence do I need?

Sales of comparable homes around the January 1, 2026 assessment date. Parcel's packet gathers that evidence for your home so you can present it to the Board.