Transformation is an intrinsic characteristic of the city. Today, cities around the globe experience the consequences of an urban revolution. While some conurbations undergo processes of deindustrialization, others, mostly in developing countries, are still experiencing the phases of industrialization in the form of an explosive urbanization. The negative effects of urban sprawl are mostly palpable in the destruction of environments, the unnecessary use of resources and an increase of social segregation. Urban sprawl is also linked to the deterioration of centers and to an inefficient distribution of land uses. Sustainable urban development implies a more environmental and social handling of urban land. An effective strategy to counteract urban sprawl is the implementation of inner urban development by means of conversion, which is understood as a reutilization of brownfields or suboptimally used urban sites by introducing new land uses. Frequent examples of potentially convertible sites are former industrial and military areas, as well as infrastructural sites such as railways and ports. Many European cities have faced the challenge of turning urban development more sustainable. Stuttgart has demonstrated how inner development is a feasible task when planners are equipped with adequate instruments for implementation. Stuttgart has revitalized innumerable areas which had suffered the effects of postindustrialization and the end of Cold War. The city has become an international paradigm of sustainable development. In the last two decades, Bogotá has experienced a revolution in terms of urban planning. However, the city has still not realized the importance of stopping urban sprawl. A true sustainable development can only be attained by systematically identifying conversion areas and by managing and promoting their development. Until now, Bogotá has very few examples of conversion projects in spite of its enormous potential for inner development. Cities must rethink their development strategies and look for paradigms in order to face the ever more complex urban problems. The present work intends to prove that Bogotá not only meets the conditions for implementing conversion measures, but that it also has the legal platform to rethink traditional methods of urban planning. In an investor-oriented city like Bogotá, urban conversion constitutes an instrument for the reduction of demand for new urban land. Conversion also constitutes a chance of improving spatial and social quality. It becomes an opportunity to generate social inclusion by assigning central areas for the development of socially and functionally mixed spaces. In this context, the approach to inner development in Bogotá has a strong social component. Improving urban quality of life requires new visions. In a rapidly urbanizing world, decision-makers need to develop strategies to make our natural habitat (which is the city) more livable. This work intends to contribute to this objective.