According to the Russian law, the tax on real estate of individuals is calculated on the basis of the cadastral value. In practice, property owners face the problem of overstating the cadastral value of their property which might cause overtaxing. This leads to disputes over the results of determining the cadastral value. The article discusses the stages and content of the procedure for challenging the results of the state cadastral valuation taking into account the legislative novelties of 2018. Description of the challenging mechanism, both in the classic version and taking into account modern legislation amendments, is presented. The advantages of the simplified procedure for challenging the cadastral value are analyzed. The simplified procedure allows reducing the number of objects, the state cadastral value of which can be challenged after approval, including in view of the erroneous information about the quantitative and qualitative characteristics of the object. Recommendations on the practical application of methodological and software for state cadastral valuation are given. Methodical and software are developed taking into account the possibility of their flexible adjustment to any legislation amendments.