![A city landscape with a prominent building at the center.](https://buildingefficiencyaccelerator.org/wp-content/uploads/2019/11/Buildings-700x525.jpg)
![A city landscape with a prominent building at the center.](https://buildingefficiencyaccelerator.org/wp-content/uploads/2019/11/Buildings-700x525.jpg)
Based on research from Lawrence Berkeley National Laboratory, the BEA and laboratory define six methodologies for establishing city-level, voluntary, existing commercial building energy efficiency improvement targets. For more, visit our Building Efficiency Targets resources page.