European Research Project OSIRYS developed a holistic solution for facades and interior partitions ready to be applied in building retrofitting and new construction. The project uses biocomposites as the base material to define different products: a multilayer façade, a curtain wall, a window and an interior partition. The biocomposites developed have different functionalities able to meet the strictest requisites of the European Building Codes as regards fire and structural performance, improve indoor air quality by VOC (volatile organic compounds) and microorganism’s elimination, increase thermal insulation and increase durability of the construction elements. The new systems are lighter than the traditional ones leading to weight savings and will reduce implementation costs during both manufacturing and assembly processes due to an industrialized based concept using modular elements.