Danish policymakers have set ambitious decarbonisation goals, targeting a 100% reduction in emissions by 2050. To achieve this, investments exceeding €215 billion are needed, particularly in expanding renewable energy, grids, biogas, hydrogen, and CCS. Large-scale construction projects play a vital role in the green transition, requiring meticulous business case preparation to ensure value delivery. However, challenges like resource scarcity and intense global competition exist. Companies like KPMG in Denmark stress the importance of risk management in such projects, proposing a five-step approach for effective budgeting and scheduling. Addressing supply chain challenges and ensuring efficient environmental approvals are crucial for success. Despite the complexities, there is optimism about navigating the green transition with strategic investments and robust risk mitigation strategies.