Abstract
Property valuation is characterized by uncertainty, understood not only as uncertainty of a single valuation, but also as a discrepancy between multiple valuations of the same property carried out at the same time and for the same purpose. A valuation is only an estimate, the outcome of which depends on the assumptions adopted by the valuer. Such assumptions may account for the potential of a property in a complex market environment in different ways.
The objective of the paper is to present the methodology of research devoted to valuation uncertainty in highly developed markets to emphasize the need to conduct such research in Poland, and to indicate the areas in which professional organizations should undertake actions.