One of the current pivotal issues globally that have a massive impact on the forthcoming generation is climate change and its consequences. Carbon dioxide (CO2) plays a key role in sustaining the appropriate temperature for the planet. It adds to the temperature and is known as a greenhouse gas (GHG). Buildings are one of the producers of GHGs and can be part of the solution through their energy performance improvements. As a viable solution, green certification systems acknowledge the large impact of buildings on the environment. They encompass various requirements for their solutions in the building construction and retrofits. As a result, Green buildings provide higher performance in energy consumption towards reduction of GHG emissions. However, these green rating organizations still carry some limitations in their methodologies including architectural and whole building interpretation. Accordingly, how can all of these green standards capitalize on the existing buildings?