Lewis County, WashingtonProperty records & tax offices
Links open the listed public-office or service-provider website in a new tab. This directory does not collect payments.
Find the right property record
Use the property portal for ownership and assessed value, the collector for a bill or balance, and the map for parcel location. Have the address, owner name, or parcel number ready.
Tax bills & filing dates
These are the dates and qualifications recorded in the directory. Confirm your tax year and current deadline with the official office and your property’s notice.
- Tax bill mailing
- February 13, 2026 (tentative); the official Treasurer page says 2026 statements were scheduled to be mailed on that date.
- Payment deadline
- April 30, 2026 for the first half or full payment; November 2, 2026 for the second half because October 31 falls on Saturday; bills of $50 or less are due in full April 30.
- Assessment appeal
- July 1, 2026 or within 30 calendar days after the Change of Value Notice was mailed, whichever is later; petition to the Lewis County Board of Equalization.
Exemptions & appeals
Exemption filing
December 31, 2026 for the next application cycle; the county states first-time senior/disabled exemption applications are not due until December 31 and are administered by the Assessor.
Senior relief
Lewis County administers the Washington senior/disabled exemption for qualifying owners age 61+ or unable to work because of disability, who own and occupy the home. The official Treasurer FAQ lists household income of $48,000 or less and says the application is made annually at the Assessor's Office.
Valuation limits
Washington's constitutional 1% property-tax limit and the statutory 1% levy limit constrain taxing-district revenue, not an individual parcel's assessed value. County assessors value property at 100% of true and fair market value, so an individual assessed value can rise or fall by more or less than 1%; voter-approved excess levies, new construction, and senior/disabled relief are separate rules.
For a valuation appeal, use the appeal date in the tax and filing section above. Keep your notice, supporting evidence, and proof of submission.
More exemption & appeal guidance →