The latest progress in information and communication technology (ICT) and the Internet of Things (IoT) have opened up new opportunities for real-time monitoring and controlling of cities’ structures, infrastructures, and services. In this context, smart water management technology provides the data and tools to help users more effectively manage water usage. Data collected with smart water devices are being integrated with building management systems to show how much water is used by occupants as well as to identify the consumption areas to use water more efficiently. By this approach, smart buildings represent an innovative solution that enhances a city’s sustainability and contributes to overcoming environmental challenges due to increasing population and climate change. One of the main challenges is resource-saving and recovery. Water is an all-important need of all living beings, and the concerns of its scarcity impose a transition to innovative and sustainable management starting from the building scale. Thus, this manuscript aims to provide an updated and valuable overview for researchers, consumers, and stakeholders regarding implementing smart and sustainable technologies for water resource management, primarily for building-scale uses.

Nature-based solutions (NbS) are sustainable tools to mitigate the impacts of climate change and urbanization. Thus, we present a specific research activity of the “Tech4You” Project, whose main objective is to contribute to the widespread implementation of NbS. In this regard, a specific area of the Cerisano urban catchment was selected for the implementation of a rain garden. A preliminary design and a predictive model were developed to assess its hydrological performance. The findings are promising and show how this green infrastructure can positively contribute to urban stormwater management.