To ensure properties are assessed uniformly and at 50% of market value, the assessor uses a two year sales study that is provided by the Eaton County Equalization Department. A sales study is an analysis of the sales price of the property compared to its SEV. Typically, the sales study runs from April 1st to March 31st. The sales are then organized by economic neighborhoods by the assessor. An economic neighborhood can be a single subdivision or a grouping of subdivisions with similar characteristics. If the sales in a certain economic neighborhood indicate an increase or decrease then all of the properties in that economic neighborhood will be changed by what the sales have indicated. This ensures all properties are assessed at 50% of market value as of December 31st.