Washington County is one of two counties in Oregon to exempt taxes for manufactured homes with an Assessed Value (AV) less than $46,500. Approximately 57% of homes located within residential parks are less than the threshold and will not be taxed. Property owners are taxed on the Assessed Value (AV). The AV is determined as the lower of Maximum Assessed Value (MAV) or Real Market Value (RMV). The MAV is capped at 3% of the prior year's AV. However, there is no cap on RMV. For many manufactured home properties, the RMV is the lower of the two and becomes the taxable AV. What this means for homes above the $46,500 threshold is that strong market increases may result in significant tax increases.