City infrastructure is a system of connected utilities, basic facilities, and services, from the smallest units of the community (houses) to the significant city structures and buildings to render services such as electricity, water supply, sewage and communications. The concept of smart infrastructure is derived from the idea of smart city which is described as a comprehensive system with different elements such as people, governance, environment, economy, mobility and living conditions at a given geographical space with efficient ICT that promote smart sustainable environment. In some counties, infrastructure is related to basic services while in Egypt infrastructure is constructed facilities. Egypt faces ever-increasing challenges related to UN sponsored sustainable urban development goals. Traditional planning approaches proved to be ineffective in facing these challenges. Sustainable development goals are focusing on providing communities with its basic, sufficient needs and rights. This paper focuses on identification of smart cities definition and characteristics, as well as smart infrastructure concept that leads to the paper findings which suggests a smart network of interrelated linkages between the basic facilities and services that provides an adequate environment for human living in accordance with the smart concept as applied in urban design principle and practices achieving sustainable development.