State Code Adoption Tracking Analysis

The U.S. Department of Energy (DOE) Building Energy Codes Program tracks adoption of energy codes for residential and commercial buildings. State adoption is tracked 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 analysis based on a methodology established by DOE. PNNL evaluates 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. An exception is made for California, Oregon, and Washington, for which PNNL relies on analysis conducted by others as a basis for its categorization.

Table 1. Status of State Energy Code Adoption Map Summary - Commercial
State Current Code
(as of December 2017)
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 2012 IECC and 90.1-2010 Between 90.1-2007 and 90.1-2010
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 2009 IECC with amendments and 90.1-2010  Between 90.1-2007 and 90.1-2010
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.

 

Table 2. Status of State Energy Code Adoption Map Summary - Residential
State Current Code
(as of December 2017)
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:

Commercial

Residential

More information on DOE support for state code adoption and other forms of technical assistance.