The article applies the method of historical research, using a temporal perspective dating back to 1985, to trace the evolution of market valuation principles for real estate in Poland. These principles evolved similarly to those in many other post-socialist countries, influenced by political and socio-economic transformations and the resulting list of objectives for which these values became essential. The changing legal regulations allowing for the emergence and development of a free real estate market played a decisive role in this process. It was also a period of preparing real estate valuation professionals to meet these requirements. Today, the methodology of valuation, under increasing pressure from various real estate market entities and the rapid advancement of intelligent data collection and processing technologies, is undergoing further evolution. In many countries, including Poland, lively discussions and disputes are ongoing regarding the legal authorization of statistical tools and automated valuation models in valuation practice. These possibilities are being considered particularly in the context of mass property valuations for tax purposes. The methodology involves the analysis of Polish legal provisions, foreign literature, and documents proving the gradual marketization of valuation principles.