Built during the Great Depression, the Empire State Building symbolizes America's limitless potential.

Today the building is undergoing a major sustainability retrofit to become a leading example of economic and environmental revitalization.



Consulting, design, and construction partners Clinton Climate Initiative, Johnson Controls Inc., Jones Lang LaSalle, and Rocky Mountain Institute recently completed an eight-month modeling and analysis project which will save 38 percent of the building's energy and $4.4 million annually.


Creating a leading example for the design of commercial retrofits was at heart a learning experience for the team. In the process of developing specific project recommendations, the team uncovered several key lessons for the retrofit of large multi-tenant commercial office buildings. Read more "Lessons Learned"