What is the legal assessment ratio for residential property in Washington?

Under state statutory benchmarks, residential real property in Washington is assessed at 100% of fair market value. Equalization is mandated under Wash. Const. art. VII, § 1 ("All taxes shall be uniform upon the same class of property within the territorial limits of the authority levying the tax").

How does Truth-in-Taxation protect homeowners in Washington during reappraisals?

Under RCW 84.55.010 (1% annual limit on regular property tax levy increases), local taxing jurisdictions must calculate a certified tax rate designed to produce the same total ad valorem revenue as the prior year, preventing local governments from generating a windfall revenue increase solely from reappraisal surges.

STATEWIDE ROLL DIRECTORY • WA (1 COUNTIES)

WASHINGTON PROPERTY TAX ROLLS

Q: What is the statutory deadline to appeal property taxes in Washington?

The statutory filing deadline is July 1, 2027 (RCW 84.40.038). Initial appeals are submitted to the County Board of Equalization (BOE), with state-level administrative review before the Washington State Board of Tax Appeals (WSBTA).

CLICK OR HOVER ANY COUNTY ON THE INTERACTIVE WASHINGTON MAP BELOW TO EXPLORE COUNTY TAX RATES, REAPPRAISAL CYCLES & APPEAL DEADLINES

MACRO TAX REGION

THE PACIFIC WEST COAST

1 Indexed Counties • National Atlas →

RESIDENTIAL RATIO

100%

Statutory Fraction of Market Value

COMMERCIAL RATIO

100%

Statutory Fraction of Market Value

APPEAL DEADLINE

July 1, 2027 (RCW 84.40.038)

County Board of Equalization (BOE)

UNIFORMITY CITATION

Wash. Const. art. VII, § 1 ("All taxes shall be uniform upon the same class of property within the territorial limits of the authority levying the tax")

RCW 84.55.010 (1% annual limit on regular property tax levy increases)

SEAT: SEATTLE

KING COUNTY

TAX RATE 1%

MEDIAN HOME $845,000

PARCELS 725,000

REAPPRAISAL 1 Yrs (2026)

OPEN COUNTY GUIDE →

INSTANT WASHINGTON PARCEL AUDIT

AUDIT YOUR WASHINGTON ASSESSMENT

Enter your residential or commercial street address to cross-reference against official Washington assessment rolls.

SELECTABLE COUNTY SUB-PAGES

FEATURED WASHINGTON COUNTY PROPERTY TAX GUIDES

1 FEATURED JURISDICTIONS

King County, WA

County Seat: Seattle • FIPS 53033

COMPLETE COUNTY SUB-PAGE DIRECTORY

WASHINGTON COUNTY ASSESSMENT ROLLS (1 COUNTIES)

OFFICIAL COMPTROLLER & TRUSTEE AUDITS

FILTER 1 WASHINGTON COUNTIES:

COUNTY	COUNTY SEAT	PARCELS	MEDIAN VALUE	REAPPRAISAL CYCLE	EFFECTIVE TAX RATE	ROLL STATUS	ACTION
King	Seattle	725,000	$845,000	1-Yr Cycle (Next: 2026)	1%	DIRECTORY	OPEN GUIDE →

STATEWIDE TAXPAYER FAQ

WASHINGTON PROPERTY TAX & EQUALIZATION FAQ

STATUTORY REFERENCE

What is the statutory deadline to appeal property taxes in Washington? +

The resolved statutory filing deadline for Washington is July 1, 2027 (RCW 84.40.038). Initial local reviews are filed with the County Board of Equalization (BOE), with administrative escalation to the Washington State Board of Tax Appeals (WSBTA).

How is residential property assessed in Washington? +

Under Washington law, residential real property is assessed at 100% of fair market value (and commercial property at 100%). Equal and uniform taxation across properties is protected under Wash. Const. art. VII, § 1 ("All taxes shall be uniform upon the same class of property within the territorial limits of the authority levying the tax").

How does Truth-in-Taxation work during Washington county reappraisals? +

Under RCW 84.55.010 (1% annual limit on regular property tax levy increases), when a county completes a reappraisal cycle (Annual physical or statistical revaluation under RCW 84.41.030), the taxing authority must calculate a certified revenue-neutral tax rate so the reappraisal itself does not automatically create an unadvertised windfall tax increase.

EXPLORE NEIGHBORING STATE SUB-PAGES IN THE PACIFIC WEST COAST & NATIONAL ATLAS:

U.S. National Atlas 50 States California (CA) 100% Ratio Oregon (OR) 100% Ratio Alaska (AK) 100% Ratio Hawaii (HI) 100% Ratio