The work, based on an applied and academic legal methodology, carries out a critical analysis of the current regulation of the institution of patrimonial responsibility as a guarantee of the citizens in our legal system. In addition, the work focuses on two of the specific assumptions that give rise to the patrimonial responsibility included in the land and urban planning legislation. Specifically, they are those relating to the liability arising from the alteration of the territorial and / or urban planning, as well as that arising from the annulment of the enabling titles for the building. The research has had as sources of knowledge, in addition to an extensive bibliography, the pronouncements of the Legal Advisory Commission and the ...