Confidence scoring entails receipt of a predicted property value for a given property, where the predicted property value is determined based upon application of a property value prediction model. A set of values corresponding to input factors is determined for the property value prediction model, and model parameters are estimated based upon those values. A confidence score for the predicted property value is then calculated using a confidence scoring model and the model parameters. The confidence score is preferably provided as an accuracy probability. This may further be in the form of a probability that the predicted property value has an error within a specified range, such as a specified range expressed in terms of a percentage error.