The Joint Appraisal of the property rights contained in a particular area of a figure of Planning (General Urban Development Plan, Partial-order Planning,…), is regulated by the criteria set forth in the laws of the Land and state expropriation as well as by the laws of urbanism autonomous. Since CEIAM cabré alegret, it has been believed and promoted, in order to do that, there will be a comprehensive and thorough identification within the scope of the flights, activities, facilities and real rights, that they exist, and be accredited.