This Special Issue aims to promote the debate on recent advances and future challenges in the field of smart building materials and designs, aiming to achieve a sustainable built environment. This reprint presents a collection of recent research advances on the building material, smart technologies, built environment, and construction. The contributions cover a broad range of topics, including recent achievements in the development of smart building materials and novel (bioinspired and non-bioinspired) designs and their applications at the architectural or urban scale.