Participation in the context of urban planning is growing in the urban and architectural processes of democratic cities. Urban co-creation means working with communities by integrating their needs, giving them the opportunity to collaborate in the transformation of the city. To achieve this, a complex and prepared participatory methodology is required for urban planning, architecture and landscape architecture professionals to work in an interdisciplinary way together with other social actors. This research presents a comparative case study method using a semiotic taxonomy, generated from previous studies. In this new stage of the research, presented in this paper, case studies and their "codes" are compared in order to find similarities between them and to understand how each part of a participatory action influences the other. The results show that these "codes" with common denominators are repeated in sometimes very different contexts.