GrInn Lab is a laboratory dedicated to innovation for sustainable development through experiments at an urban, local and territorial level, which combines theoretical research, applied research, innovation (including social) and technological transfer. Addressing the challenges and fractures that the ecological and technological transition is producing, the laboratory is based on an ecosystem approach to innovation in the dual sense of targeting the production of complex ecological, cultural, social impacts and of aiming to involve five main urban actors: public, private, social, educational-cultural-scientific, local communities and vulnerable inhabitants of cities.