Nature-based Solutions (NbS), including artificial wetlands, raingardens, and reforestation, provide an effective strategy for enhancing living circumstances in rapidly expanding metropolitan areas. Nonetheless, empirical evidence suggests that the decision-making processes related to projects, especially in informal settlement improvement programs, are not favourable to the NbS incorporation. This study investigates the meta-functional relationships among the principal parameters influencing the concentration of Nature-based Solutions (NbS) in multidimensional regions. The methodology begin with a thorough examination of active NbS projects in Italy. The primary component starts to identify the key variables affecting NbS concentration. The principal driving forces are associated with the sustainable performance achievable through NbS implementation, alongside the luxury effect, which pertains to a city's productive prosperity. These factors can support a green transition plan for sustainable and equitable urban expansion by eco-system approach-design and programming public actions.