This document is the final report for the Residential New Construction Baseline Study. The study was sponsored by the Northwest Energy Efficiency Alliance, with additional sample points contributed by the Energy Trust of Oregon, Eugene Water and Electric Board, Tacoma Power, and Idaho Power. The study was conducted by RLW and Ecos Consulting. This is the second residential new construction study conducted by the Northwest Energy Efficiency Alliance (herein referred to as “NEEA”). The previous study was published in 2001.