Summary of the thesis The thesis demonstrates, that the housing of public promotion stimulated by the State across the programs of the Institute of Territorial Credit ICT, was a key factor in the process of formation of Bucaramanga's Metropolitan Area; likewise, that it’s projects had a great impact on the central city and stimulated the settling of agricultural soils on it’s peripheries, where they propitiated the incorporation of new urban soils. For it’s comprehension there became necessary the interpretation of the territory and the form since it was historically constructed. The used methodology sent us to a simultaneous reading of the territory, the policies, the planning schemes, the phases and projects of the I.C.T. and his materialization in the urban area. The importance of this bet has allowed to rake historically, the coherence between the central policies, the planning and the project’s direct incidence of the in the construction of the urban fabric. The programs and projects correspond to the general limits that on them were defined from the national politics and were executed to local level. The analysis of these factors was a key element in the reading of the form like they gave the operations and the processes of occupation of the suburban periphery. This process is of deep transcendence, provided that the public actions affected of notable form in the conurbation between Bucaramanga and Floridablanca that served to stimulate private projects, and to prepare new centrality. The developments both of Girón and of Piedecuesta in the southern part, they will be incorporated into the Metropolitan Area as functional spaces. This way, Girón was the territory in which the industrial corridors will develop and with few public actions of housing; while Piedecuesta, more distant, turned into the reservation of soil privileged for the big projects of housing of low density and high cost, and that from the utilization of his landscape privileged conditions, is glimpsed as the excellent scene of the future developments of the metropolitan area. The explanatory frame that orientates this thesis, has a clear spatial shade. It is important in essence, to determine the form since the urban fabrics develop from these interventions, to investigate on the correspondence between urban development actions and instruments of planning and arrangement. In strict sense, this academic exercise seeks to fill one it emptied that during decades it was waiting for Bucaramanga's city and his metropolitan area, since there does not exist a work that shows in a specific way, the relation between the development of the housing of Public Promotion and the process of metropolización; matter that though it turns out to be predictable judging by the empirical elements that might be evident in some Colombian cities, one had not deepened in the form like there relate the conditions of the territory, his logic of occupation and the political processes formal administrative officers who derived in the conformation of the metropolitan areas.