Sales Ratio Studies

Purpose of the Studies
The sales ratio study shows whether assessments within a given area actually average 331/3 percent of the market value. If the study results in something other than 331/3 percent, a blanket percentage change (increase or decrease), called an “equalization factor” or “multiplier”, is applied to all non-farm property to bring the level of assessments to 331/3 percent.

In addition to its value in determining inter-county equalization factors, an assessment/sales ratio study is a useful tool for local assessing officials in their efforts to achieve assessment uniformity; Comparison of median assessment levels for townships or property categories within a county can reveal a lack of uniformity among categories or geographic areas within the county. This lack of uniformity can often be remedied by intra-county equalization, which may raise the average assess­ment level in some townships, areas, or categories and lower it in others, until all are at the average assessment level of the county.

In addition to supplying information about aver­age assessment levels, the study can also provide knowledge of the degree of uniformity, or degree of divergence from the average, in the assessments of individual parcels within a district. The closeness of individual assessments to the average assess­ment level is just as important to a property owner as the level itself.

Get a Copy of Your Study
Sales ratio studies for assessment neighborhoods are conducted by your township assessor’s office. This report is done prior to that office finalizing the assessment each year. If you are interested in seeing the most recent sales study for your neighborhood, that can be obtained from your township assessor’s office. The Department of revenue sales ratio studies for each township for the 2013-2015 years are available below:

Sales Ratio Studies