“Introducing Urban Controversies” has to do with the unfolding of the positive aspect of conflict within the making of the architectural and urban projects where the urban actors are in constant re-alliance and dispute. Disputing matters, in regards to the role of the commons during post-conflict reconstruction or urban regeneration could be well structured, creating arenas of creative confrontation amongst urban actors with divergent agendas. Urban actors across divides would have the possibility to re-ally beyond their ethnic identity or social status. Emerging collectives of heterogeneous actors could be the protagonists in transforming ethnic and social conflicts. Then, we could go beyond of peacebuilding as neutralizing agent of conflict and of urban regeneration as gentrification agent.