State Code Adoption Tracking Analysis
The U.S. Department of Energy (DOE) Building Energy Codes Program reviews adoption of energy codes for residential and commercial buildings. State adoption is reviewed based on the national model energy codes–the International Energy Conservation Code (IECC) for residential buildings and Standard 90.1 for commercial buildings (42 USC 6833). DOE analyzes state energy codes to assess the savings associated with code updates. The resulting findings aid model code adoption, and serve as a means of supporting states working to update their energy codes.
State Analysis
Pacific Northwest National Laboratory (PNNL) conducts state-level technical analysis based on a methodology established by DOE. PNNL reviews state energy codes based on the IECC and Standard 90.1, including any significant amendments. This helps states understand how their codes compare to the national model codes, and provides a portrait of national code adoption.
A quantitative analysis is performed to assess the energy savings impacts within a given state. The calculated energy use intensity (EUI) of buildings built to a particular state code is compared to the energy use of the model energy code. This comparison allows for a categorization of each state, with categories based on recent editions of the model codes. If a state EUI is within a range of ± one percent (relative to the model code), the state code is categorized as equivalent to the model code. For states whose codes fundamentally differ from the national model codes, PNNL may consider analysis conducted by others as a basis for its categorization.
| State | Current Code (as of June 2018) |
State Map Legend |
|---|---|---|
| Alabama | 90.1-2013 | 90.1-2013 or equivalent |
| Alaska | None statewide | No statewide code or home rule |
| Arizona* | Home rule | Less energy efficient than 90.1-2007 |
| Arkansas | 2009 IECC and 90.1-2007 | Between 90.1-2007 and 90.1-2010 |
| California | 2013 California Energy Code | More energy efficient than 90.1-2013 |
| Colorado | 2003 IECC for jurisdictions that have adopted codes (Home Rule) | No statewide code or home rule |
| Connecticut | 2012 IECC with amendments and 90.1-2010 | Between 90.1-2007 and 90.1-2010 |
| Delaware | 2012 IECC and 90.1-2010 | Between 90.1-2007 and 90.1-2010 |
| District of Columbia | 2012 IECC with amendments and 90.1-2010 | Between 90.1-2007 and 90.1-2010 |
| Florida | 2012 IECC with amendments and 90.1-2010 | More energy efficient than 90.1-2013 |
| Georgia | 2009 IECC with amendments and 90.1-2007 | Between 90.1-2007 and 90.1-2010 |
| Hawaii* | Home rule | Less energy efficient than 90.1-2007 |
| Idaho | 2015 IECC and 90.1-2013 | Between 90.1-2010 and 90.1-2013 |
| Illinois | 2015 IECC with amendments and 90.1-2013 | Between 90.1-2010 and 90.1-2013 |
| Indiana | 90.1-2007 with amendments | 90.1-2007 or equivalent |
| Iowa | 2012 IECC and 90.1-2010 | Between 90.1-2007 and 90.1-2010 |
| Kansas | Home rule | No statewide code or home rule |
| Kentucky | 2012 IECC and 90.1-2010 | Between 90.1-2007 and 90.1-2010 |
| Louisiana | 90.1-2007 | 90.1-2007 or equivalent |
| Maine | 2009 IECC and 90.1-2007 | Between 90.1-2007 and 90.1-2010 |
| Maryland | 2015 IECC with amendments and 90.1-2013 | Between 90.1-2010 and 90.1-2013 |
| Massachusetts | 2015 IECC with amendments and 90.1-2013 | More energy efficient than 90.1-2013 |
| Michigan | 2009 IECC and 90.1-2007 | 90.1-2013 or equivalent |
| Minnesota | 2012 IECC with amendments and 90.1-2010 | Between 90.1-2007 and 90.1-2010 |
| Mississippi | 90.1-2010 | 90.1-2010 or equivalent |
| Missouri | Home rule | No statewide code or home rule |
| Montana | 2012 IECC and 90.1-2010 | Between 90.1-2007 and 90.1-2010 |
| Nebraska | 2009 IECC and 90.1-2007 | Between 90.1-2007 and 90.1-2010 |
| Nevada | 2012 IECC and 90.1-2010 | Between 90.1-2007 and 90.1-2010 |
| New Hampshire | 2009 IECC and 90.1-2007 | Between 90.1-2007 and 90.1-2010 |
| New Jersey | 90.1-2013 | 90.1-2013 or equivalent |
| New Mexico | 2009 IECC and 90.1-2007 | Between 90.1-2007 and 90.1-2010 |
| New York | 2015 IECC and 90.1-2013 with amendments | Between 90.1-2010 and 90.1-2013 |
| North Carolina | 2009 IECC with amendments and 90.1-2010 | Between 90.1-2007 and 90.1-2010 |
| North Dakota | Home rule | No statewide code or home rule |
| Ohio | 2012 IECC with amendments and 90.1-2010 with amendments | Between 90.1-2007 and 90.1-2010 |
| Oklahoma | 2006 IECC and 90.1-2004 | Less energy efficient than 90.1-2007 |
| Oregon | 2014 Oregon Energy Efficiency Specialty Code | 90.1-2010 or equivalent |
| Pennsylvania | 2009 IECC and 90.1-2007 | Between 90.1-2007 and 90.1-2010 |
| Rhode Island | 2012 IECC with amendments | Between 90.1-2007 and 90.1-2010 |
| South Carolina | 2009 IECC and 90.1-2007 | Between 90.1-2007 and 90.1-2010 |
| South Dakota | Home rule | No statewide code or home rule |
| Tennessee | 2012 IECC and 90.1-2010 | Between 90.1-2007 and 90.1-2010 |
| Texas | 2015 IECC and 90.1-2013 | Between 90.1-2010 and 90.1-2013 |
| Utah | 2015 IECC and 90.1-2013 | Between 90.1-2010 and 90.1-2013 |
| Vermont | 2015 IECC with amendments and 90.1-2013 with amendments | Between 90.1-2010 and 90.1-2013 |
| Virginia | 2012 IECC with amendments and 90.1-2010 | Between 90.1-2007 and 90.1-2010 |
| Washington | 2015 Washington State Energy Code | More efficient than 90.1-2013 |
| West Virginia | 90.1-2007 | 90.1-2007 or equivalent |
| Wisconsin | 2015 IECC with amendments and 90.1-2013 with amendments | Between 90.1-2010 and 90.1-2013 |
| Wyoming | Home rule | No statewide code or home rule |
*A review of the codes in place in jurisdictions across the state indicates that 86% (Hawaii) and 82% (Arizona) of the population is covered by codes at this level.
| State | Current Code (as of June 2018) |
State Map Legend |
|---|---|---|
| Alabama | 2015 IECC with amendments | Between 2009 IECC and 2012/2015 IECC |
| Alaska | None statewide | No statewide code or home rule |
| Arizona* | Home rule | Less energy efficient than 2009 IECC |
| Arkansas | 2009 IECC with amendments | 2009 IECC or equivalent |
| California | 2013 California State Code | More energy efficient than 2012/2015 IECC |
| Colorado | Home rule | No statewide code or home rule |
| Connecticut | 2012 IECC with amendments | Between 2009 IECC and 2012/2015 IECC |
| Delaware | 2012 IECC | 2012/2015 IECC or equivalent |
| District of Columbia | 2012 IECC with amendments | 2012/2015 IECC or equivalent |
| Florida | 2012 IECC | 2012/2015 IECC or equivalent |
| Georgia | 2009 IECC with amendments | 2009 IECC or equivalent |
| Hawaii* | Home rule | Less energy efficient than 2009 IECC |
| Idaho | 2012 IECC with amendments | Between 2009 IECC and 2012/2015 IECC |
| Illinois | 2015 IECC with amendments | Between 2009 IECC and 2012/2015 IECC |
| Indiana | 2009 IECC | 2009 IECC or equivalent |
| Iowa | 2012 IECC with amendments | Between 2009 IECC and 2012/2015 IECC |
| Kansas | Home rule | No statewide code or home rule |
| Kentucky | 2009 IECC | 2009 IECC or equivalent |
| Louisiana | 2009 IECC | 2009 IECC or equivalent |
| Maine | 2009 IECC | 2009 IECC or equivalent |
| Maryland | 2015 IECC | 2012/2015 IECC or equivalent |
| Massachusetts | 2015 IECC with amendments | More energy efficient than 2012/2015 IECC |
| Michigan | 2012 IECC with amendments | Between 2009 IECC and 2012/2015 IECC |
| Minnesota | 2012 IECC with amendments | Between 2009 IECC and 2012/2016 IECC |
| Mississippi | None statewide | No statewide code or home rule |
| Missouri | Home rule | No statewide code or home rule |
| Montana | 2012 IECC with amendments | Between 2009 IECC and 2012/2015 IECC |
| Nebraska | 2009 IECC | 2009 IECC or equivalent |
| Nevada | 2012 IECC | 2012/2015 IECC or equivalent |
| New Hampshire | 2009 IECC with amendments | 2009 IECC or equivalent |
| New Jersey | 2015 IECC with amendments | Between 2009 IECC and 2012/2015 IECC |
| New Mexico | 2009 IECC | 2009 IECC or equivalent |
| New York | 2015 IECC | 2012/2015 IECC or equivalent |
| North Carolina | 2009 IECC with amendments | Between 2009 IECC and 2012/2015 IECC |
| North Dakota | Home rule | No statewide code or home rule |
| Ohio | 2009 IECC | 2009 IECC or equivalent |
| Oklahoma | 2009 IECC with amendments | Between 2009 IECC and 2012/2015 IECC |
| Oregon | 2014 Oregon Residential Specialty Code | 2012/2015 IECC or equivalent |
| Pennsylvania | 2009 IECC | 2009 IECC or equivalent |
| Rhode Island | 2012 IECC | Between 2009 IECC and 2012/2015 IECC |
| South Carolina | 2009 IECC | 2009 IECC or equivalent |
| South Dakota | Home rule | No statewide code or home rule |
| Tennessee | 2009 IECC with amendments | Less energy efficient than 2009 IECC |
| Texas | 2015 IECC | 2012/2015 IECC or equivalent |
| Utah | 2015 IECC with amendments | Between 2009 IECC and 2012/2015 IECC |
| Vermont | 2015 IECC with amendments | 2012/2015 IECC or equivalent |
| Virginia | 2012 IECC with amendments | Between 2009 IECC and 2012/2015 IECC |
| Washington | 2015 Washington State Energy Code | More energy efficient than 2012/2015 IECC |
| West Virginia | 2009 IECC | 2009 IECC or equivalent |
| Wisconsin | 2009 IECC with amendments | Between 2009 IECC and 2012/2015 IECC |
| Wyoming | Home rule | No statewide code or home rule |
*A review of the codes in place in jurisdictions across the state indicates that 86% (Hawaii) and 82% (Arizona) of the population is covered by codes at this level.
Available Data
The state-level results behind the DOE adoption status maps are available for commercial & residential buildings:
More information on DOE support for state code adoption and other forms of technical assistance.