OAR 150-308-1150: Ratio Calculation for Open Space Lands

(1) An open space ratio must be applied to the open space special assessed value of newly designated open space lands to determine a maximum specially assessed value. The Department of Revenue will annually calculate a statewide ratio for open space lands. (a) Counties with 10 or more open space accounts must develop and apply their own ratio. (b) Counties having less than 10 open space accounts must use the statewide ratio. (2) The ratio is calculated by dividing: (a) The total current year maximum specially assessed value of land for all open space accounts (prior year’s maximum specially assessed value multiplied by 103 percent), by (b) The total current year specially assessed value of land for the same open space accounts. (3) Only land that is specially assessed as open space may be used in the open space ratio calculation. (4) Property that may not be used in developing the open space ratio calculation includes: (a) Land that is valued under another special assessment program; (b) Land that does not qualify for open space assessment; (c) Any portion of an account that is assessed at market value, such as buildings; (d) New open space accounts; and (e) Disqualified accounts.