The starting point of this study is the lack or insufficiency of participation in urban design projects, despite the emphasis for the need of an effective participation in literature. Participation is based on the idea that a built environment works better when users are involved in its creation and management. Successful participatory projects allow urban managers and designers to realize the potential of a participatory approach. However, integration of participation into urban design processes involves challenges and opportunities, which do not exist in conventional urban design processes. This thesis aims to describe how can participation be integrated into an urban design process. A qualitative research design and a case study approach is used in the thesis. The case study of the thesis focuses on the process of the "İzmirdeniz" Project, which is presented as a participatory urban design project. The thesis revealed that İzmirdeniz Project, achieved a “symbolic participation” not an “active participation”. An open and flexible participatory urban design process, allowing inputs and feedback continuously, is essential for an effective participation. The institution leading the project must be committed to pursue a participatory process, determine goals, stakeholders, methods, and the level of participation. Reinterpreting the urban design process according to current expectations, and proposing perspectives in which the user can participate in the urban design process, without losing control of professional knowledge, expertise and design focus, is necessary for improving living environments. Keywords: Urban Design, Participation, Participatory Urban Design, Level of Participation, İzmir Coastal Design Project, İzmirdeniz.