Found by USGBC (U.S. Green Building Council), LEED or Leadership in Energy and Environmental Design is the most recognized green building rating system in the world. In 2015, LEED registered and awarded projects reach almost 100,000 projects worldwide. LEED is score driven rating system which covers all key factors of a green building that include Sustainable Site, Water Efficiency, Energy and Atmosphere, Material and Resources, Indoor Environmental Quality, Innovation in Design, and Regional Priority. Four certification levels including Certified, Silver, Gold, and Platinum can be achieved.

TREES or Thai Rating of Energy and Environmental Sustainability was developed for green building project in Thailand who seeks the alternative certification award focusing on Thai context. Referring LEED as a prototype, TREES is currently most recognized green building standard in Thailand with almost 70 registered projects. Similar to LEED, TREES is a quantifiable score-driven rating system with 4 certification levels including Certified, Silver, Gold, and Platinum.