The “FASTECH” PRIN 2022 research project from Vanvitelli University aims to expand the sustainable potential of Italian programs for Renewable Energy Communities. The project develops a protocol to assess strategies for designing multi-benefit Sustainable Urban Communities, where various resource co-benefits integrate as a circular community economy. The model supports municipalities in developing urban ecosystems that promote synergic integrations that maximise the social return on sustainable investments. This approach combats energy poverty and redesigns public facilities through strategies based on strengthening community relations and improving livability in metropolitan peripheral neighborhoods. This research group extends a previously tested building accessibility performance model to encompass an entire neighborhood unit. The tool evaluates the accessibility level of streets, identifying safe pathways to buildings and public facilities, regardless of users’ physical abilities. GIS tools enhanced with specific algorithms identify critical factors for street improvements. The pilot case study comprises the municipal territory of Melito di Napoli, analyzing the accessibility of street sections connecting schools, city hall, and urban parks. The protocol provides local authorities with a flexible environmental design system, integrating climate risk mitigation, inclusivity, and sustainability to improve community quality of life.