By migration, cultures meet and new communities are created. Until a common understanding is reached, it takes generations to learn and adapt to each other. The process contains misunderstanding which can lead to wider social gaps, violence or even terrorism. Migrants challenged by the trauma of multiple loss (home, community, family, existence) and the confusion over cultural differences. By participatory design, mixed groups can find a common language, learn from each other and overcome conflicts. Experiencing the flow of design process and placemaking (empathize-ideate-prototype-create) can support community building and realizing common values. On this basis, the concept of architectural/designer role should be reconsidered as they should not take the position of the decision maker but one equal member of the interdisciplinar facilitator team consisting of psychologists, social workers and other creatives to support the process of community building in an intercultural environment.