Assessor's Office440 Third Street Columbus, IN 47201 Assessment Process For more information about the assessment process, we are providing two documents from the International Association of Assessing Officers. The first is for the Property Owner Who Wants to Know. The second is How to Understand Your Assessment. 2007 Homestead Refund Percentage Rates For more information about the Homestead Refund Percentage Rate, please review following document. Homestead Refund Percentage Rate |