At the end of 2013, the Catholic University of Lille embarked on the dynamics of the Third Industrial Revolution (TRI). The “Live TREE” orientation scheme is a declination and is part of the regional project “Zero Carbon University”. Among the projects concerned, the building of 41 rue du Port in Lille (called RIZOMM) is to be renovated and is expected to become a sociotechnical demonstrator of energy efficiency at the end of 2018, in connection with the programme of the So MEL So Connected territory. The aim is to reach the level of performance of buildings with positive energy on this rehabilitation project (5 306 m² of useful surface area). The electricity generated will be self-consumed and shared on an island-wide basis. The proposed energy efficiency approach is first of all a heavy thermal renovation (strong intervention on the built envelope with a lower project Ubat of -47.34 % to the reference Ubat and a lower project Cep of -105.73 % to the regulatory reference Cep. Energy efficiency involves the installation of photovoltaic panels (1 194 m², presented in another file), energy pooling, and real-time production-consumption synchronisation. The research side concerns in particular the creation of an experimental platform to modify facade elements and openings and the development of the digital model (BIM) as a tool for design, maintenance, research and communication training.