In the face of climate urgency and rapid urban change, buildings must become more adaptable to extend their lifespan and reduce environmental impact. Yet, adaptability is often undermined by project delivery methods (PDMs) that are not well equipped to manage, plan, and deliver long-term lifecycle requirements, even though in terms of design, it is technically possible, particularly in modular construction. This research examines how PDMs can be restructured to enhance building adaptability. Using a comparative case study of two Dutch modular projects (a campus office expansion and a relocatable housing development) this study applies a Design Structure Matrix (DSM) and RACI framework to analyze the alignment of technical design, process workflows, and stakeholder roles. The analysis reveals a critical socio-technical misalignment: while modular systems provided technical capability, adaptability was consistently compromised by process-related barriers, including delayed technical coordination, missing lifecycle documentation, and unclear post-use accountability. Findings are synthesized into a structured delivery framework that integrates disassembly planning, modular reuse logic, and iterative feedback loops from the project's outset. This research provides a practical approach for project managers to proactively structure delivery for adaptability. It contributes to the field by demonstrating that successful adaptability is not merely a technical feature but an output of a holistic alignment of the project delivery system.