Due to the nature of the construction industry, disputes arise frequently. Resolving these disputes through the court system is both a time- and cost-consuming process. The outcome of construction litigation is normally affected by a large number of complex and interrelated factors and therefore is very difficult to predict. Methods to predict the outcome of construction litigation are not available today because this decision carries very big risks. In this study, case-based reasoning (CBR) is used to predict the outcome of construction litigation tried in Illinois circuit courts. These circuit court cases are organized in 43 input features and 1 output feature. If CBR systems such as the one developed in this study (prediction rate 83%) are available to the parties before they litigate, legal expenses could be avoided, and considerable time could be saved.