Washington County, Oregon owners may ask the Property Value Appeals Board to review current-year property values after tax statements arrive. Petitions must be postmarked or delivered by December 31, subject to the next-business-day rule, and the county states there is no filing fee. The owner should confirm the annual form because the page still displayed the prior tax year's date at review. Oregon's Real Market Value, Maximum Assessed Value, and Assessed Value interact, so a petition should identify the value challenged and realistic tax effect. FairPath can compile an evidence packet, while the owner states a value, signs, files with the county clerk, and handles Board correspondence.
Assessment context: Washington County combines high-demand technology corridors, established Beaverton neighborhoods, Hillsboro growth areas, older communities, new subdivisions, rural land, vineyards, farms, and forest-edge parcels. Check the tax statement and county property record for account, RMV, MAV, Assessed Value, land and improvements, class, building characteristics, and January 1 date. Urban growth boundary location, zoning, development capacity, traffic, transit, school influence, private streets, HOA limits, wells, septic, acreage, slope, wetlands, and condition can create meaningful differences. Because taxes use the lesser of RMV and MAV, first determine whether the requested RMV would cross below MAV rather than promising tax savings from an RMV reduction alone.
Filing process: Retrieve the current Board petition from Assessment and Taxation or the county clerk after annual statements are issued. Complete the account information, copy the statement values accurately, state the requested value, explain the basis, sign, and attach exhibits. Washington County says there is no fee. Mail or deliver the filing by December 31 and preserve the postmark or receipt. Hearings generally occur from the first Monday in February through April 15; the clerk sends scheduling details. The Board decides value, not the amount of tax. Industrial property appraised by Oregon DOR follows a direct Tax Court path rather than this local Board, so confirm the appraising authority before using the county form.
Evidence to review: Choose arm's-length sales near January 1 from the same urban, suburban, or rural buyer pool. Reconcile differences in city, school influence, urban growth boundary, lot utility, zoning, living area, age, quality, remodel, garage, accessory units, view, utilities, acreage, vineyard or farm improvements, and condition. Use county records, photographs, inspections, repair bids, permits, wetland or slope maps, easements, and income information when appropriate. Explain RMV separately from MAV and Assessed Value. Do not rely on taxes or another parcel's percentage increase. A short table with source dates, adjustments, and a transparent requested-value calculation gives the citizen Board a reviewable record.
Current deadline guidance: December 31, 2026 or next business day if required. Washington County value petitions are filed after tax statements are mailed and must be postmarked or delivered by December 31, or the next business day when December 31 falls on a weekend or holiday. The county had not yet replaced its prior-year date when reviewed, so confirm the 2026 form before submission.
Washington County states that local value appeals carry no filing fee.
Petitions are filed with the county clerk after statements issue and by December thirty first.
State-appraised industrial property bypasses the local Board for Oregon Tax Court.
Technology corridors, urban growth boundaries, farms, vineyards, and forest-edge parcels require different comparable pools.
Official filing authority: Washington County Property Value Appeals Board. https://www.washingtoncountyor.gov/at/appraisal/bpp/property-value-appeals-formally-board-property-tax-appeals-bopta
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.
Source: Washington County Assessment and Taxation, Appraisal and Appeals, https://www.washingtoncountyor.gov/at/appraisal. 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.