In Sweden, local and regional planning practices are faced with the challenge of managing rapid growth in expansive urban regions. However, spatial planning should also contribute to the fulfilment of formalized sustainability objectives and support sustainable development. This includes addressing cross-cutting sustainability issues that transcend established administrative and territorial boundaries. Thus, the management of sustainability issues requires attention from actors at different levels, and challenges how contemporary planning practices plan for development. Based in the expansive Stockholm region, this study explores the cross-level interaction in spatial planning and decision-making and planning practitioners’ experiences and apprehensions of contemporary municipal planning practices with a focus on statutory plans to achieve sustainability targets and objectives. The results show that municipal planning organizations are under pressure because of rapid urban expansion. It is concluded that the role, format and content of statutory as well as informal planning instruments are decisive for the cross-level interaction between planning levels. Moreover, planning instruments find new trajectories resulting in mismatches in expectations from planners at adjacent planning levels. This influences the interplay and preconditions for achieving national and regional sustainability targets and objectives.

The quest for cogent responses to sustainability goals challenges local spatial planning practices across growing metropolitan regions to develop planning approaches that enable transformative capacity in increasingly complex settings. Based on a case study conducted in the Stockholm region, this paper explores the design and organization of local planning processes to provide a basis for a discussion of alternative approaches that may enhance sustainability in plan and project development. More specifically, it aims to analyze the conditions for embedding and consolidating sustainability issues in local planning processes. The results show that the municipalities need to create conditions for an effective interplay between the planning work carried out in individual projects and the organization of resources, knowledge, and skills on which the projects depend to handle sustainability issues. This study contributes to the understanding of the challenges associated with putting sustainability into practice at the local level by identifying and conceptualizing three important barriers. By acknowledging the temporal, locational, and procedural dimensions of knowledge in local planning processes, planning practices may become better at knowing when, and in what ways, different forms of knowledge can become created, introduced, and used in a synergistic manner to aid the realization of sustainability goals.

Geodesign supports collaborative urban planning by managing ‘boundaries’ between diverse knowledge holders. However, there is a paucity of empirical evidence of its contribution to ‘boundary work’. This paper aims to evaluate how a geodesign process facilitates knowledge co-production through boundary work and to assess the scientific credibility, political saliency, and procedural legitimacy of its outputs in urban planning. We propose a replicable geodesign framework to assess boundary work, and test it in a case study on urban transformations with nature-based solutions in the Skarpnäck district of Stockholm, Sweden. Findings indicate that all geodesign steps facilitated communication by promoting collective reasoning. Participants acknowledged contributions to knowledge co-production and decision-making by mediating between different perspectives. However, data quality and modeling simplicity were identified as critical factors affecting the outputs’ perceived credibility. Future applications should include co-designing the geodesign process, improving capacity and skills, and facilitating more integrated planning.