Browse source-reviewed property tax appeal guides for Oregon. County deadlines, filing methods, and available records can differ by county and tax year.
Each published guide identifies the public sources used for its deadline and filing summary. Confirm current requirements with the official filing authority before submitting anything.
Multnomah County: 2026 deadline guidance is December 31, 2026. Guide: https://fairpath.app/property-tax-appeal/oregon/multnomah-county
Washington County: 2026 deadline guidance is December 31, 2026 or next business day if required. Guide: https://fairpath.app/property-tax-appeal/oregon/washington-county
Source: Multnomah County, Appeal Types, https://multco.us/info/appeal-types. Reviewed 2026-07-16.
Source: Multnomah County, Property Values Appeal Process, https://multco.us/info/property-values-appeal-process. Reviewed 2026-07-16.
Source: Oregon Department of Revenue, Property Tax Appeals, https://www.oregon.gov/dor/programs/property/pages/property-appeals.aspx. Reviewed 2026-07-16.
Source: Washington County Assessment and Taxation, Appraisal and Appeals, https://www.washingtoncountyor.gov/at/appraisal. Reviewed 2026-07-16.
Source: Washington County Assessment and Taxation, Property Value Appeals, https://www.washingtoncountyor.gov/at/appraisal/bpp/property-value-appeals-formally-board-property-tax-appeals-bopta. Reviewed 2026-07-16.