The 2nd International Conference on Circularity in the Built Environment (CiBEn) aims at becoming a major point of contact between researchers, engineers and practitioners in the area of construction and demolition waste (C&DW) processing and valorization. CiBEn intends to provide researchers and industry experts with the opportunity to exchange their ideas and showcases in advanced/innovative technologies and methodologies to process and valorize C&DW in the context of circular economy.