Scott,
John and I are in the same state and we rule under the Uniform Construction Code of NJ. Which for the most part covers the NEC in it's entirely with some small changes. We have a "Rehab" code that just uses the 2005 NEC. As John stated, a new 2nd floor would follow the 2008 NEC and a new finished basement would fall under the "Rehab" code which for us is the '05 NEC.