Urban Informality and the Built Environment demonstrates the value of greater and more diverse forms of engagement of built environment disciplines in what constitutes urban informality and its politics. It brings a multi-disciplinary approach to the study of informality and the built environment in diverse contexts, drawing on recent research by architects, planners, political scientists, geographers and urban theorists. The book presents different case studies from multiple geographies, drawing attention to the need for studying urban informality in the Global North and Global South. The cases promote a cross-fertilization between disciplines, lenses, geographies and methodologies. They range from the creative place-making of street artists in Accra, to the morphological evolution of urban Tirana, urban agriculture in la Habana and social reproduction in Greece. Additional contributions highlight the cross-cutting themes of infrastructure, exchange and image. Urban Informality and the Built Environment introduces built environment disciplines to its constitutive roles in producing urban informality. It also tests a range of new methodologies to the study of urban informality, demonstrating the possibilities for new insights when building on the relational understanding of urban informality.