LEED stands for “Leadership in Energy and Environmental Design” and is the most widely used green building rating system in the world. In other words, LEED is a certificate of appreciation awarded to buildings that comply with the fundamental sustainability requirements in order to support the natural habitat without disturbing the ecosystem. A performance score is generated based on the fulfilment of the LEED certification requirements. The Performance Score determines the level of LEED certification awarded. Performance Score and Certification Levels are as follows: LEED Certified (40-49), LEED Silver (50-59), LEED Gold (60-79), and LEED Platinum (80+). A minimum Performance Score of 40 must be achieved in order to receive the LEED certified status for all buildings. Özyeğin University has been awarded with the LEED GOLD certificate for its AB1, AB2, and SC buildings.