The changing world economy since the 1970s and the decrease in welfare and deregulation in the Global North have led to an inefficient and declining stock of affordable housing. In the Global South, the need to economically catch up with the Global North has led to a lack of sustainable affordable housing policies. Social and affordable housing policies in the Global South have been either non-existent or very inefficient. The aim of this short paper is to start a discussion (and contribute to the existing ones) on how the social dynamics of informal settlements may be a source of new approaches to the provision of affordable housing in the Global North and South. Despite their illegal status and characterisation as urban blight, informal settlements are frequently illustrative examples of collaborative processes in the areas of planning and development that depend on the social connections and relationships among squatter households.