Kallipolis is a nonprofit organization that aims at improving livability in urban contexts through the approach of social urbanism. Kallipolis works, in Italy and other countries, to promote a widespread application of the principles of sustainable development, social integration of marginal populations and groups and to support quality of life and safety in urban environments by making use of participatory planning tools. Kallipolis focuses on urban quality and safety in the processes of transformation and renovation of the urban fabric. In this context, we have elaborated an approach that aims at identifying risk factors and strenghts through crucial information and looks forward to systematize the collection, production and analysis of data about urban phenomena. This approach requires the participation of citizens and that of all the relevant actors, in order to provide shared strategies. The product of this process allows decision-makers and planners with guidelines to design quality and safety policies in which citizens are crucial factor to reaffirm the liveability and sociality of public spaces, in order to ensure a long term, social and economic sustainability of the actions that will be undertaken. Kallipolis is intrinsically multidisciplinary, operating through professionals with different backgrounds from the socio-economic and the technical sectors