This paper examines the role of social research and communication methodologies in fostering substantive democratic participation and policy co-production within the context of urban regeneration initiatives anchored in the United Nations Sustainable Development Goals. This research critically analyzes the “becoming public” of sociology and social research in participatory design processes related to traditional urban planning instruments at the local scale (Regulatory Plans) in the Italian context, specifically through the case study of the Municipality of Appignano. It questions the role of sociology in activating a competent public sphere and promoting deliberative democracy at urban and territorial design levels and whether we can identify the traits of public sociology in facilitating the different stages of these processes. This paper details a participatory process in Appignano that sought to innovate urban regeneration within complex legislative frameworks, emphasizing community engagement and interdisciplinary approaches. The findings reveal a community actively participating in the regeneration process, demonstrating a high level of agreement on various urban development strategies aimed at sustainability. This study underscores the capacity of public sociology to facilitate public debate and democratic dialogue and suggests that such participatory approaches can significantly contribute to sustainable and resilient urban development, highlighting the potential of sociology as a moral and political force in urban planning.