A Green building is well-managed in its technical and managerial senses. To achieve a Green Building standard, real estate developers should have frameworks in place to monitor and provide information regarding the sustainable aspects of the building. Energy, Social, and Governance (ESG) data is related to the impact made by a building during its operations. A standardized and scalable digital twin to monitor this data will allow developers to achieve a Green Building status easily. This work aims to gather the requirements for such a digital twin that allows the management of the ESG data of a commercial building, enabling real estate developers to monitor and manage the building more sustainably with improved transparency.