The aim of this paper is to present a theoretical-conceptual approach to residential mobility, in general, and residential trajectories, in particular. It seeks to understand how from the unequal distribution and appropriation of social resources -both material and symbolic- different trajectories are developed and how socio-territorial structures constrain, shape and enable interactions between families, their members and the various contexts of action towards meeting their housing needs. From sociological contributions of different traditions, we present a scheme that pays attention to articulating the relationship between structural factors, position in social structure and decisions relating to changes of residence. We conclude that mobility patterns are relational patterns that are defined in dialogue with the opportunities and limitations that are set up around the housing stock and new or vacant land, the land market dynamics and housing, the labor market, the provision of infrastructure services and social facilities, etc. [ABSTRACT FROM AUTHOR]