In recent years, the term “co-creation,” a buzzword in the business and management sector, has made its way into the architecture and urban planning discourse. The term is used to define a large concept that describes working intentionally with others to create something jointly. But architecture is already the result of a collaboration between multiple actors, architects, clients, investors, developers, and local administration, to name a few. Can the term still apply to this field, can it bring forth new forms of knowledge, and does it differ from the concept of participatory design?