Saving energy is an important issue for cities and urban areas. One way to improve in this area is to consider the scale of energy management. Smart Urban Isle is a project which argues arranging cities into small integrated areas yields the best results. This unit of measurement can be thought of as a smart urban isle, a system which seeks to locally balance the use of energy. The project will set up mini networks that have decentralised energy generation, energy storage, and energy distribution. Furthermore, the project will also consider the bioclimatic designs of buildings and urban planning as well as energy management systems which control and optimise energy flows. By pursuing these goals, the project will evaluate smart urban isles as a basic unit of energy measurement for Smart Cities. If successful, this will lead to a whole new way of urban planning, which will allow cities to grow in a sustainable way. The project will be conducted in Spain, the Netherlands, Switzerland, Romania, Cyprus, and Austria.