Including Citizens’ Perspective in Advancing Urban Green Infrastructure: A Design-Toolkit for Private Open Spaces

In response to the growing pressure from urban expansion and the risks associated with climate change, adapting cities and reintroducing nature into the urban environment are becoming increasingly urgent. The implementation of Urban Green Infrastructure plays a key role in adaptation strategies, thanks to its ability to offer a wide range of ecosystem services. However, the adaptation process must necessarily be trans-scalar and include collective participation to ensure a real improvement in both physical and social urban resilience. For this reason, citizen participation in planning processes is essential, but even more important is the recognition of their active role and the scope for private citizens’ involvement. The transformation of private spaces according to UGI principles and with a view to the common interest, however, is still a theme that is scarcely included in urban resilience plans. This study presents the results of a survey conducted in the case study of Milan through questionnaires and focus groups to record preferences, concerns, and priorities in the sustainable transformation of private open spaces. The outcome of the study is the definition of a toolkit for the design of private open spaces, integrating Nature-Based Solutions and adhering to UGI principles.