The superstructure comprises a composition of five building structures each with seven above-ground and three subterranean floors as well as its own integrated logistics. The complex will provide future tenants with flexible and state-of-the-art floor space. The building permit was legally validated on 8 June 2017. Project planning envisages construction of the property in one phase and until 2021. Upon completion, the major «Espace Tourbillon» development project will span usable floor space totalling 95 000 square metres, providing the fast-growing Geneva region space for an additional 4 000 workplaces. Two planned buildings were sold to the Hans Wilsdorf Foundation at the end of 2017 and will be fully developed and transferred to the buyer in turnkey condition in 2021.