The LEGOFIT project aims to design, implement and validate an advanced and dynamic integrative approach to accomplish EPH based on smart and innovative solutions with a high scalability and replicability for building construction and renovation, through: i) developing an innovative holistic design platform that encompass not only passive and active technologies but also their integration for smartest exchange of information and interoperability of systems based on Building Information Modelling (BIM), available for both professionals and end-users, ii) integrating active and passive strategies (e.g. envelope, HVAC systems, integrated solutions, including nature based solutions, etc.) with smart management technologies (BAS, BMS) for climate neutral and high energy building performance providing maximum flexibility to users iii) investigating innovative routes for promoting minimum environmental impacts by the smart use of solid and liquid residues generated during building life cycle stages and iv) fostering sustainable stock of buildings by guaranteeing not only the fulfilment of sustainable criteria (economic, social, environmental) but also according to the enhancement of smart readiness of buildings. This innovative and integrated approach is demonstrated in 3+ demos across a range of geographical, cultural and construction stages/technological market maturity scenarios. The building typology focus is the residential sector, multifamily houses and dormitories, including both new and existing constructions. The involvement of professionals in the sector is ensured through the development of a community of stakeholders and an open innovation community for Building Energy System (BES) professionals. Training courses focused on the new positive energy house approaches will ensure a new generation of multidisciplinary team of experts on the topic.