The paper describes the development process of a Pan-European Citizen Lab initiative driven by the European University of Technology (EUt+) alliance.EUt+ is a consortium of nine institutions that wasselected as one of the European University Alliances by the European Commission. The partners are all technological universities from across Europe.Our visionis that the co-design of the Citizen Lab based on an analysis of societal needs will fosteruser-driven innovation. The expected impact will be anincreased participation of citizens,anincreased awareness of research, andsocial issues addressed at the community level.Toachieve our vision,we have chosen Action Design Research (ADR) as one of the main tools for the creation of the Citizen Lab. ADR is a design research methodology that considers both technological and organizational contexts,shaping artefacts (innovations) through design and use, including users and researchersin the process. Originally focused onthe ITknowledge domain, ADR was not originally designed to co-create innovations for diverse users in ecosystems, the EUt+ consortium views ADR as a highly promising hypothesis that needs further adaptationand verification for this new purpose.