In the last few years the phenomena of the cities shrinkage produced dismissed areas and buildings. Today, there is an increasing demand for affordable properties: the crisis in the construction industry created an oversupply of properties – about half a million of unsold houses in Italy (Il Sole 24 Ore, 2014) – currently left to decay. At the same time the economic crisis has produced new poverty ranges, and there is a progressive aging of the Italian population, causing an increase in the request for health and social care services. It becomes necessary to leave the “old” systems and to identify new development models: the reclaiming of unused spaces through a temporary architecture become the possible strategies to find answers to the new social needs.