EGS-plan has supported the project with fundamental commissioning services. Building commissioning is a quality management process, which verifies, that the technical systems of a new building are meeting the owner’s project requirements. Therefore, commissioning starts right at the beginning of a new building project before the design starts. In regular periods, the design and the construction of a project will be checked and compared by EGS-plan’s commissioning experts with the original owner’s expectations. The actual commissioning work starts for our team with finalizing of the construction and startup of the technical systems. A commissioning plan clarifies responsibilities and provides functional checklists, so that the startup of the building is a structured process, despite of the final hectic weeks of a construction project. The result is a building which works as intended with a low energy consumption, great thermal comfort and low maintenance costs.