This Special Issue series focus on the latest and cutting-edge advances in field closely related to “smart buildings and cities” and encourage researchers to publish their original papers, reviews, methodological studies and empirical research on the design and implementation of the concept of smart buildings to foster energy sustainability and to make the urban environment more intelligent as well as improve the quality of life of citizens. Topics may include, but are not limited to, the following:

• Smart buildings;
• Smart cities;
• Smart energy;
• Smart grids and smart infrastructures;
• Power electronic for management of energy flows in buildings;
• Energy management;
• Energy efficiency;
• Energy-efficient communication and connectivity;
• HVAC systems optimization;
• Information and communication technology (ICT) in the smart city;
• Internet of Things (IoT) for smart cities