The term ecosystem has its origin in biology and is composed of a community of independent organisms sharing the same habitat. From their interactions, matter and energy are obtained, resulting in the equilibrium of the ecosystem. In a business innovation ecosystem, the aim is to generate a habitat where the efforts, perspectives and potential of different organisations join forces to go beyond the limits of each of the entities and, through collaboration, transform knowledge into innovation. What is an innovation ecosystem? Innovation is the process of putting new ideas into practice. Creativity is putting intelligence into action and is the process of coming up with original ideas that have value. Therefore, an innovation ecosystem is the ideal environment to accompany the idea from its creation to its implementation in the market. What is the role of organisations in this continuous learning ecosystem? The roles of an innovation ecosystem in which each party performs a function so that each actor can be clear about what needs to be fulfilled and what results to contribute: inform, provide, train or finance, among others. There are six typifications that define this ecosystem model: the Articulators, the Linkers, the Enablers, the Knowledge Generators, the Promoters and the Communities. REBUILD wants to share knowledge to mutually support and develop the 4.0 sector beyond government policies, providing it with a certain stability and sustainability as a hub of this new ecosystem. In short, the key question will be how to harness the full potential of a new innovation ecosystem in the architecture and construction sector so that it can benefit from the momentum, update and dynamise its business model, maintain itself and even revolutionise its own sector.