The U.S. Department of Energy (DOE) supports the development of cost-effective energy codes and standards to increase efficiency in residential and commercial buildings. Pacific Northwest National Laboratory (PNNL) conducted a series of analyses for the residential model code, the International Energy Conservation Code (IECC), for one- and two-family dwellings, townhomes, and low-rise multifamily residential buildings.
- Cost Analysis of the 2015 IECC Compared to the 2012 and 2009 IECC 
- Cost Analysis of the 2012 IECC Compared to the 2009 and 2006 IECC 
- Energy Savings Analysis of the 2012 IECC Compared to the 2009 and 2006 IECC 
- HERS Analysis : An evaluation of the relationship between the Residential Energy Services Network's (RESNET) Home Energy Rating System (HERS) Index and the traditional simulation-based Performance Path used in the IECC.
Cost-effectiveness reports covering state-specific scenarios for the 2012 IECC are available in Table 1.
DOE assesses the cost-effectiveness of residential codes based on a life-cycle approach, balancing first costs against longer-term energy savings over the life of the home. More information on the DOE analysis is presented in the Technical Support Document , which documents the analytical approach, energy and cost savings analysis results, and other details regarding the analysis methodology. The resulting simulation input and output files used in the analysis are available on the Residential Prototype Building Models  page.
For questions not covered in the report, or other concerns, please contact the Building Energy Codes Program help desk .
|Alabama ||Alaska ||Arizona ||Arkansas |
|California*||Colorado ||Connecticut ||Delaware |
|District of Columbia ||Florida*||Georgia ||Hawaii |
|Idaho ||Illinois*||Indiana ||Iowa |
|Kansas ||Kentucky ||Louisiana ||Maine |
|Maryland*||Massachusetts ||Michigan ||Minnesota |
|Mississippi ||Missouri ||Montana ||Nebraska |
|Nevada ||New Hampshire ||New Jersey ||New Mexico |
|New York ||North Carolina*||North Dakota ||Ohio |
|Oklahoma ||Oregon*||Pennsylvania ||Rhode Island |
|South Carolina ||South Dakota ||Tennessee ||Texas |
|Utah ||Vermont ||Virginia ||Washington*|
|West Virginia ||Wisconsin ||Wyoming |
|*Cost Analysis not planned for this state.|
For more information on the cost-effectiveness of residential building energy codes, see