This report assessed commercial building practices to the 2003 International Code Council International Energy Conservation Code (IECC). Plan review and field inspection of 55 new construction commercial buildings determined if the plans complied with the IECC, and if the building was built to the plans and code. Because an energy code had not previously been enforced, personnel were trained to conduct the onsite inspections and collect data on "typical" commercial construction. Compliance issues were identified and documented.