Major complex urban development projects are challenging and put pressure on coordination, cooperation and integration between a multitude of various interdependent construction projects and supply chains. While prior studies on supply chain integration mostly concern continuous exchanges in manufacturing industries, there is less research on discontinuous exchanges in project-based supply chains. This knowledge gap has resulted in an increased interest for partnering as supply chain integration in project-based supply chains and there is a conceptual and practical framework developed for understanding partnering as a multidimensional construct including four dimensions of supply chain integration: strength, scope, duration and depth of integration. This framework is useful for investigating separate projects but fails to acknowledge the program perspective including inter-project coordination and the interdependence between different projects and supply chains in the same program. The purpose of this study is to investigate how SCI may be achieved across projects within the same program. Findings are drawn from a case study of Stockholm Royal Seaport. Each stage of Stockholm Royal Seaport can be studied as a program including a multitude of interdependent and parallel projects performed within a limited timeframe and a limited area. The findings suggest that supply chain integration between projects is as important as within projects and the theoretical implications suggest an additional dimension to the multidimensional partnering framework when taking a program perspective. Partnering as supply chain integration has a width dimension on program management level that is more challenging to manage since formal procurement and contracting mechanisms are put in place mainly at the project level, not the program level.