Many analogies can be drawn from the cadastre in Poland and Slovakia, because of the partly shared history of the Austro-Hungarian Empire, World Wars I and II, and the influence of the Communist regime. However, its development over the years has taken different forms and rules of operation in both countries. Currently, from a European perspective, there are efforts to standardise cadastral systems to expand their functionality for land administration and to accommodate social needs. The aim of this article is to discuss and provide a detailed comparative analysis of the general principles of the cadastre in Slovakia and Poland. The study shows similarities but also many differences between the systems in both countries, which indicates that it could be a difficult path to unify the cadastral systems within the European Union. A comparison of the solutions used in other countries allows us to see potential opportunities for the development and modernisation of the existing cadastral systems.