Since the time of the last revaluation program, property values have changed. Many properties have improved, some have deteriorated. Over time, different neighborhoods appreciate at different rates. Different types and classes of properties change in value in different ways. The fairness or equity of the property tax depends on whether similar properties are treated alike. If the assessments do not keep pace with property changes and market conditions, inequities creep into the tax list. When that occurs, some property owners may be assessed at more than other with comparable homes and are paying more than their fair share of property taxes, while others are paying less. A revaluation of all properties corrects the inequities and inaccuracies so that each property tax payer is paying his or her fair share.