Spokane County WA Property Tax Appeal Deadline 2026 - How to File

If you disagree with the value the Spokane County Assessor placed on your property, you appeal to the Spokane County Board of Equalization, not the Assessor's office directly, and the deadline is tied to your own individual revaluation notice rather than one countywide date. Washington law sets the baseline rule as the later of July 1 or a set number of days after the Assessor mails your value-change notice, and Spokane County's Board of Equalization is explicit on its own website that petitioners should use "the deadline date noted on your revaluation notice" because notices go out over the course of the year rather than all at once. In practice, that means the single most reliable source for your personal deadline is the notice itself, and calling the Board at 509-477-2250 to confirm your specific date before you file is worth the few minutes it takes.

How assessments work in Spokane County

The Spokane County Assessor's Office, based at the Spokane County Courthouse at 1116 W Broadway Avenue in Spokane, revalues property and mails notices when a property's assessed value changes. Under Washington's statutory framework, a Board of Equalization petition must be received by the later of July 1 of the assessment year or a window of days after the notice was mailed or electronically transmitted, with counties permitted to extend that window by local ordinance. Because Spokane does not publish one universal notice-mailing date on its Board of Equalization pages, the county's own guidance directs every property owner back to the date printed on their notice rather than a single fixed calendar date. If you believe you are appealing a value and cannot find your notice, contact the Assessor's Office at 509-477-3698 for a copy before your window closes.

Whether you should appeal

An appeal makes the most sense when you have solid evidence that the Assessor's value is higher than what your property would actually sell for, most commonly comparable arms-length sales of similar homes near you. Spokane County's Board of Equalization recommends gathering comparable sales in your own subdivision or neighborhood, including parcel number, sale date, sale price, lot size, square footage, year built, condition, and distinguishing features like views or waterfront access. Before filing a formal petition, the county recommends contacting your appraiser at the Assessor's Office first, since many disagreements resolve informally without a hearing. If your value is in line with recent comparable sales, or your real objection is your tax bill rather than your assessed value, a formal appeal is unlikely to help, since the Board only has authority over valuation, not tax rates or budgets.

Step-by-step how to file

First, contact the Assessor's Office to discuss your value informally and request comparable sales data if you don't already have it. Second, complete the Real Property Valuation Determination petition, Spokane County's Board of Equalization form for real property appeals; separate forms exist for personal property, senior citizen/disabled person exemption and deferral, current use or forest land, and appeals to the state Board of Tax Appeals. Third, submit your signed original petition by email to the Board of Equalization or by mail to 721 N Jefferson Street, Suite 201, Spokane, WA 99260 — check the Board's current webpage for the exact submission email before sending, since Spokane does accept electronic petitions. Fourth, attach your comparable sales evidence, photographs, repair estimates, or appraisals directly to the petition; the Board notes a real estate agent's opinion letter alone is not sufficient support. The office operates by appointment only, Monday through Friday, 8:30 a.m. to 4 p.m., closed for lunch 12:30 to 1:30 p.m.; call 509-477-2250 ahead if you want to discuss your petition in person. Spokane's Board of Equalization pages do not list a filing fee for real property petitions.

What happens after

Once the Board receives your petition, it reviews it for completeness and timeliness, assigns a petition number, and forwards your materials to the Assessor's Office, with review activity beginning around July 15 each cycle. Washington's administrative rules require the Assessor to provide valuation information to you and the Board within 60 days of a request, and at least 14 business days before your hearing. Spokane's Board also allows roughly 60 days for you and the Assessor's Office to communicate and potentially resolve the disagreement before a hearing is scheduled, with hearings then set in filing order. Filing an appeal does not pause your tax bill: if first-half taxes are due April 30 while your case is pending, you must still pay the amount the Treasurer has billed. If the Board later reduces your value, any overpayment is applied as a credit or refund, often against your second-half payment due October 31.

Local tips

Because Spokane's process runs on a rolling basis rather than one mass mailing and deadline, mark your notice's exact due date the day it arrives rather than assuming it matches a neighbor's or a date you saw for a different Washington county. If you qualify based on age or disability and limited income, ask the Assessor's Office about the senior citizen and disabled persons property tax exemption and deferral program; for tax years 2024 through 2026, Washington's Department of Revenue lists Spokane County's income thresholds at $36,000, $43,000, and $50,000 across three exemption tiers, with a $53,014 threshold to qualify for deferral instead. Washington has no general homestead exemption, so outside these targeted senior, disabled, current-use, or forest-land programs, appealing your assessed value is the main lever available if you think your valuation is too high. Your actual tax savings from a successful appeal also depend on your local taxing districts' levy rates, which vary by city, fire district, school district, and other overlapping jurisdictions within Spokane County — the Assessor's or Treasurer's office can tell you the combined rate for your specific parcel.