The objective of the Preparation Phase is to develop a complete project document for the project “Improving the energy efficiency (EE) of the global building supply chain industry and its products to deliver high performance buildings” with all accompanying materials that outlines concrete, result-oriented activities of all stakeholders, takes account national circumstances of the beneficiary countries and responds to their needs in an effective manner while remaining consistent in terms of common outputs and outcomes, and ensures alignment across the board on the project log-frame. The project “Improving the energy efficiency of the global building supply chain industry and its products to deliver high performance buildings” aims to develop a strong foundation of proven best practice methods and focused technical capacity that beneficiary countries can build upon to improve building energy performance and reduce embodied carbon and energy to support their development and achievement of enhanced national determined contributions (NDC) targets. Main outcomes of the project: NDC enhance improvements in EE in buildings and the building sector’s supply chain and specify how these targets support the Paris Agreement; countries have clear and interconnected strategies to achieve NDC targets, including institution and dissemination of best practices and capacity building; concrete measures for improving performance of the building sector supply chain and its end products are implemented, with progress tracked across a range of the quality-of-life indicators. Emphasizing scalability and replication, the project will focus specifically on improving the effectiveness of the building sector supply chain to improve the complete lifecycle performance of buildings. By focusing on the building sector supply chain, the project will address the embodied energy and carbon of buildings and ensure that buildings’ operational components are designed and installed to operate optimally. A core element of the project will be to engage actively with the beneficiary countries to develop their relevant public and private sector capacities to ensure the long-term replication and upscaling of the project activities.