Analysis: The objective is to find out energy consumption in traditional buildings versus the recently built LEED certified buildings. Assumption is that total livable square-footage in a building relate to building's energy consumption. We will investigate livable area as a proxy for total energy consumption with a linear regression analysis in natural and log space to identify linear or power law relationships for both LEED and non-LEED type buildings. ANCOVA statistical model will be used by assuming a linear relationship between livable area and energy use.