150-309-0230 Assessor’s Ratio Study for Tax Purposes: Definitions (1) Appraisal area is an area in a county generally composed of one or more school districts, a city or other political subdivision, or any other logical division established by the county assessor for conducting an orderly reappraisal of taxable property as required by ORS 308.234. (2) A market area is a group of properties that generally shares important characteristics that influence value. Each market area should contain a sufficient number of accounts to ensure an adequate sale sample for analysis. (3) Appraisal ratio is the percentage relationship between the real market value for the prior year and an estimate of the current year’s real market value made by a qualified appraiser for a particular property. (4) Appraisal ratio study is a statistical compilation of appraisal ratios for a representative group of properties in the county randomly selected on a property class basis to produce an indication of the ratio of the prior year’s real market value to the current year’s real market value for all taxable properties in a particular class of property within the county, in a particular class of property within an appraisal area, or in a particular class of property within a market area. (5) Assessor’s ratio study is required to be filed with the clerk of the property value appeals board. (6) Class is a classification of property described in OAR 150‐308‐0310. (7) Current assessment roll is the roll being prepared for the tax year beginning July 1, of the current calendar year. (8) Current real market value is the property’s real market value, or for specially assessed properties the statutory value, as of the January 1, assessment date for which the roll is being prepared. (9) New construction is a new structure or structures added to the current assessment roll or value added by completion of construction, remodeling, renovation or other physical improvement of existing property. (10) Properties added to the roll are any properties on the current assessment roll which were not assessed on the prior year’s roll. They include value added by changed status of specially assessed properties and value added through partitioning or subdividing properties. (11) Qualified appraiser is an appraiser registered pursuant to ORS 308.010 or who is licensed or certified under 674.310. (12) Ratio study is a study which estimates: (a) The percentage relationship between the total prior year’s real market value of each class of taxable property on the prior assessment roll and the total current real market value of the same properties in each class on the current assessment roll; and (b) The percentage relationship between the total prior year’s real market value of each class of taxable property on the prior assessment roll and the total current real market value of the same properties in each class on the current assessment roll within each appraisal area, or market area. (13) Sales ratio is the percentage relationship between the real market value for the prior assessment year and the selling price for a particular property. (14) Sales ratio study is a statistical compilation of sales ratios designed to produce an indication of the real market value ratio of each property class, and the real market value ratio of each property class within each appraisal area, or market area. (15) Taxable property includes all locally assessed property, real and personal, not exempt from taxation (whether appraised by the assessor or the Department of Revenue). It does not include properties assessed by the Department of Revenue pursuant to ORS 308.505 to 308.660. (16) Real market value ratio is the percentage relationship between the prior year’s real market value of a class of taxable property on the prior assessment roll and the current real market value of the same property on the current assessment roll. Statutory/Other Authority: ORS 305.100 Statutes/Other Implemented: ORS 309.200 History: REV 40-2024, minor correction filed 06/25/2024, effective 06/25/2024 Renumbered from 150-309.200-(A), REV 26-2016, f. 8-12-16, cert. ef. 9-1-16 RD 9-1997, f. & cert. ef. 12-31-97 RD 2-1996, f. 12-23-96, cert. ef. 12-31-96 RD 9-1989, f. 12-18-89, cert. ef. 12-31-89 RD 9-1984, f. 12-5-84, cert. ef. 12-31-84 TC 17-1979, f. 12-20-79, cert. ef. 12-31-79 REV 1-1975, f. 12-19-75