Natural disasters such as fires, epidemics, earthquakes are factors affecting the development and transformation of cities, as well as making class segregation visible. A built environment, where population density is increasing, social facilities are scarce, buildings are frequent, streets are narrow, flood and earthquake risks are constantly on the agenda, unhealthy houses built using incomplete and insufficient materials, and public services and infrastructure are inadequate, reveals a class reality. In this study, the urban and class segregation will be analysed through the urbanization process, construction sector and indebtedness dynamics.