To ensure properties are assessed uniformly and at 50% of market value, the assessor uses the results of the equalization study that is provided by the Eaton County Equalization Department. This study is an analysis of the sales price of the property compared to its SEV for each class of property; residential, commercial, industrial, or agricultural. If there are not a sufficient number of sales for a particular class then the SEV will be compared to the appraised value that is done by the county appraisal staff. Typically, the sales study runs from October 1st through September 30th for residential. This study may also be a 2 years study at the discretion of the County and State. The same study period applies to the appraisal study although this most likely will be a 2 years study given the lack of sales in the commercial and industrial classes. The sales/appraisals 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, or group of similar type properties. If the sales/appraisals 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/appraisals have indicated. This ensures all properties are assessed at 50% of market value as of December 31.