Benton 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 2026; Benton County Treasurer states statements/courtesy notices are mailed in February based on addresses as of December 31.
- Payment deadline
- April 30, 2026 for the first half or full amount; October 31, 2026 for the second half when the bill exceeds $50.
- Assessment appeal
- Before July 1, 2026 or within 30 days of the Change of Value Notice, whichever is later, for a Benton County Board of Equalization petition.
Exemptions & appeals
Exemption filing
April 30, 2026 is the Washington senior/disabled property-tax exemption deadline; Benton County's official forms page provides the Senior Citizen and People with Disabilities application.
Senior relief
Benton County administers the RCW 84.36.381 senior/disabled exemption for qualifying owners age 61+, disabled persons, or qualifying surviving spouses, on a principal residence and up to one acre; the county FAQ lists income up to $40,000 and says renewal is generally every six years.
Valuation limits
Washington's 1% limit applies to taxing-district revenue, not individual assessed values. Benton County assesses at 100% of fair market value; a parcel's value may rise more or less than 1% even when a district's levy growth is limited.
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 →