Urban development is characterised by the interconnection of different thematic fields: urban mobility, energy production and supply, construction activity, the development and maintenance of places to work, shop, relax and live cannot be considered independently of one another, but require an interdisciplinary and transdisciplinary approach. In practice and research, the role of digitalisation and new information and communication technologies within urban spaces is being discussed increasingly under the heading “Sustainable Smart City”. This encompasses various concepts and ideas that address the links between technical and social innovations and current urban challenges. The connection of different spatial levels is also of significance in this context: smart buildings, smart neighbourhoods and smart cities are by no means discrete concepts, but are dependent on and influence one another.