A Prioritisation Model Aiding for the Solution of Illegal Buildings Problem

In Italy, especially in the southern areas, illegal buildings and unauthorized settlements are serious and very old problems that remain unsolved in spite of three building amnesties. As a consequence, local authorities have to face the demolition of an enormous number of buildings, as prescribed by the Italian law. Being possible the execution of only a certain number of demolition orders during a short period due to financial and social reasons, the problem of how to select the buildings arises. This worrying situation had become the object of a special bill giving elements to establish priorities for demolition of illegal buildings. In this work we propose a multicriteria model aimed at giving a rational ranking of buildings on which a demolition order lays on. It is based on TOPSIS method and, given the only database with information on buildings; it is able to provide the competent authority with priority for building work demolitions according to the bill.