One of the objectives of the 2006 Residential New Construction Characteristics and Practices Study was to characterize the overall energy usage of these buildings. This short report discusses the methodology used to collect and analyze the data to estimate annual energy usage. Billing data reflected in this report represents data captured over a 16-month period of continuous occupancy from January 2006 through March 2007 that was then normalized for typical weather conditions. The report describes total building energy use by state and by heating system type.