Frequency of Valuation
State law requires that the Assessor maintain a systematic revaluation program. All property in Johnson County is reviewed at least once every 4 years. If property characteristics change because of new construction, remodeling, additions, subdivisions, etc., a new valuation is determined. All property is re-valued annually based on available information and current cost tables. If you as a land owner made an improvement you are responsible by statute to contact our office for a new valuation.