When planning a construction investment, an evaluation is often performed. In order to make the best possible choice, it is necessary to define the correct specification of the evaluation criteria which will guide us through the decision-supporting procedure. Some criteria refer to measurable phenomena, hence they can easily be defined. Others, however, need to be described with linguistic methods and require adequate scale and identification methods. This article presents methods used to prepare and choose the correct criteria for carrying out an assessment of the building investment, applicable to various criteria and different multi-criteria methods.