Breivoll Arena was constituted in 2022 in response to the development plans for Breivoll as a multifunctional and sustainable housing area- and transport hub with space for a variety of urban production businesses and blue-green structure management. Today, the area is a low-density industrial- and business area with weakly developed public transport and infrastructure. Breivoll Arena aims to bring together core stakeholders and citizens for joint mobilization of innovative ideas, pilots, and resources for sustainable development of the area based on a particular co-creation approach developed by Paadriv-Oslo. Paadriv convened the initial Arena meeting, within which a ‘Vision Note’ about the ‘Productive housing area Breivoll’ was presented to a group of local public, civic and private stakeholders. The initial partners of Breivoll Arena includes, besides Paadriv, a variety of local property owners, developers and private businesses and the municipality. The focus of the Arena has been on how to make Breivoll into an innovative, diverse, and sustainable micro-city focusing on mobility and area development issues. Ideas for a few small pilot project activities, both temporary and more permanent, have been launched that may enahnce interest in area development and provide learning and examples for how a sustainable transition can evolve. Funding for the Arena initiative is both public and private. Despite operated mainly as a multiparty platform, the ultimate success of Breivoll Arena as a co-creation experiment depends on the government’s powers and willingness to follow-up on the development plans and co-fund activities related to basic public infrastructure (metro/railway station; noise/pollution control measures) and area development (streets, parks and green structures). Such co-investments are required to attract full attention from the private sector in developing the perceived business potentials of the area. The Arena offers an interesting case to study encounters between a social incubator and a variety of public and private stakeholders in the local co-creation of green and sustainable urban transformation.