Smart Urban Isle aims to move forward with urban energy savings. Based on a three cornerstones procedure, the project aims at a whole new urban planning that allows cities to grow in a sustainable way. Consequently, we develop an innovative concept for city planning, where cities are arranged and grow through small integrated areas. The project will probe Smart Urban Isle as an innovative basic energy unit in the smart city. Municipalities such as Amsterdam, Winterthur, Zurich, Limassol, Iasi, Granada, Güssing (through ecoEnergyLand) and Santa Cruz de Tenerife have shown their interest to work hand by hand implementing the outcomes.