YouRban cocreates an active urban ecosystem for the recycling and upcycling of objects and materials, in relation to reinforced polymers coming from local environment. The project activates an urban setting of citizens, artists, designers, architects, small-scale producers, artisans, and Urban Factories. YouRban is engaged in the New European Bauhaus and the Green Deal principles of aesthetic and environmental balance, alongside sustainability and inclusion parameters, through regenerative design and manufacturing, encouraging dialogue across cultures, disciplines, professions, genders, and ages. A local and flexible decentralized production system is generated in two European cities, both linked to the Climate-Neutral and Smart Cities EU Mission, Milan and Barcelona. Two complementary pilots will cocreate new objects through a Neighbourhood Participatory Approach supported by Collaborative Digital tools. The material recycling and reprocessing experiences will go through a 10-day event around a mobile plant on board of a Truck that will be placed in the city and open to all actors. Experts will be available to provide knowledge and training, citizens will be involved to provide needs and expectations, artists will be engaged through artistic residences to provide solutions inspired by art and culture, beyond functionality, Urban Factories will participate thanks to a Cascade Funding mechanism. YouRban performs social sustainability (inclusion, work-life balance, human-centered innovation, involvement of marginalized groups, knowledge sharing, job skills generation, employment opportunities); environmental sustainability (waste and transportation impact reduction, benefits in terms of CO2 emissions, no dependency on critical raw materials); economical sustainability (relevant market opportunities and related economic returns to European manufacturing companies, which will enable the sustainability of the initiatives in the city even after the end of the project).