In the context of global urbanization, the mechanisms of transferring, trading, and compensating land development rights have gradually evolved into key policy tools that balance social equity, economic development, and environmental governance. Confronted with the challenges of multi-stakeholder coordination and the distribution of development rights in complex urban renewal scenarios, many countries are exploring ways to institutionalize and spatialize development rights. This study focuses on Italy’s "Urban Equalization Policy" and addresses the core research question: how does this policy regulate land redevelopment through the mechanism of building rights, and further guide urban spatial design? The aim is to investigate how Italy’s urban equalization policy influences the transformation of land redevelopment patterns and urban spatial structures, and to construct a "Policy–Development– Design" transmission framework that evaluates the policy’s applicability and effectiveness through the integration of theory and practice.