State and Local Policy Database

Commercial Code

Mandatory commercial building codes require a minimum level of energy efficiency for new commercial buildings. The Department of Energy estimates that between 1992 and 2012, commercial codes resulted in cumulative energy savings of 2.8 quads. They project that an additional 24.5 quads will be saved through 2040 due to residential building energy codes.

The Alabama Energy and Residential Code (AERC) Board adopted the 2015 Alabama Commercial Energy Code, based on ASHRAE 90.1-2013. The update commercial code took effect January 1, 2016. Local jurisdictions may adopt more stringent codes.

Last Updated: July 2018

Alaska has no statewide commercial building code, but all public facilities must comply with the thermal and lighting energy standards adopted by the Alaska Department of Transportation and Public Facilities mandated by AS44.42020 (a) (14).

Last Updated: August 2017

Arizona is a home-rule state, meaning that codes are adopted and enforced on a local rather than state level. However, the Southwest Energy Efficiency Project has found that the majority of new construction activity occurs in jurisdictions who have adopted the 2012 IECC or 2015 IECC. In addition, all state-funded buildings constructed after February 11, 2005 must achieve LEED Silver certification and meet the energy standards of ASHRAE 90.1-2004 as mandated by Executive Order 2005-05. 

Last Updated: August 2017

The Arkansas Energy Code for New Building Construction is mandatory state-wide for both residential and commercial buildings. The commercial energy code is based on the 2009 IECC with amendments. This code became effective on January 1, 2015. Newly constructed or remodeled public buildings must comply with ASHRAE 90.1-2007.

Last Updated: August 2017

The 2016 Building Energy Efficiency Standards were adopted in June 2015, effective January 1, 2017.  In September 2016 the California Energy Commission certified to U.S. DOE that the 2016 Standards exceed ASHRAE/IESNA Standard 90.1-2013 by 13% on average for the nonresidential building types analyzed (see Energy Commission Nonresidential Energy Efficiency Comparison). The 2016 Reach Standards were adopted in October 2015, effective January 1, 2017.  They establish updated Tier I and Tier II standards that local governments consider for adoption as local ordinances. 

Last Updated: July 2018

The 2003 IECC is a mandatory minimum for jurisdictions that have adopted a code previously. Jurisdictions that have not adopted or enforced codes are exempt from the 2003 IECC requirement, although the 2012 IECC is mandatory for all factory-built and multi-family structures – commercial and residential – in areas that do not adopt or enforce buildings codes. The State of Colorado Division of Fire Prevention and Control regulates the construction of health care and school facilities, and the 2015 IECC is mandatory for these specific construction types as well. Otherwise, Colorado has no rule-making authority to require jurisdictions to adopt any code. 67% of construction activity occurs in communities that have adopted the 2012/2015 IECC or greater.

Last Updated: July 2018

Following a review that began in January 2017 by the state's Codes and Standards Committee and Department of Administrative Services, state regulators voted in July 2018 to move forward with adoption of the 2018 Connecticut State Building and Fire Safety Codes, which include the 2015 IECC  for residential and commercial construction. The Connecticut Department of Administrative Service has announced its intent to adopt the 2015 IECC effective October 1, 2018.

Details regarding the state's code adoption process and schedule can be found on its Code Adoption Webpage. In addition, Connecticut Law now provides the State Building Inspector and Code Committee a process to adopt and implement the latest IECC during the same year.  

Last Updated: September 2018

Commercial construction in Delaware must comply with ASHRAE 90.1-2010. The state is currently reviewing ASHRAE 90.1-2013 and ASHRAE 90.1-2016 and anticipates adoption in 2017. Residential and commercial codes are reviewed triennially by the Delaware Energy Office within the Department of Natural Resources and Environmental Control.

Last Updated: July 2018

Washington DC's energy codes are mandatory across the District. For commercial buildings, builders must again comply with the 2013 DC Energy Conservation Code, which is based on ASHRAE 90.1-2010 and 2012 IECC-Commercial. The District also has a Green Construction Code that enhances energy efficiency requirements in addition to the energy code.  It applies to all commercial construction projects 10,000 square feet and larger and all residential projects that are 10,000 square feet and larger and four stories or higher.

Last Updated: July 2018

Effective December 31, 2017, Florida law requires that commercial buildings comply with the 6th Edition (2017) Florida Building Code, Energy Conservation. The 6th Edition (2017) Florida Building Code, Energy Conservation consists of the foundation code 2015 IECC and amendments. (See https://codes.iccsafe.org/public/collections/FL). The Florida Building Commission certified in letters to the U.S. Department of Energy that the new code meets or exceeds 2015 IECC standards. Compliance with the code is mandatory for all new construction including alteration to existing buildings.

Last Updated: June 2018

On January 1, 2011, the 2011 Georgia State Minimum Standard Energy Code became effective statewide as approved by the Georgia Department of Community Affairs on November 3, 2010. The commercial codes reference ASHRAE 90.1-2007. The state also adopted the 2011 Georgia State Minimum Residential Green Building Standard, based on the 2008 National Green Building Standard (NGBS) with 2011 Georgia Amendments, as an optional code. It is available for local government adoption and enforcement.

Last Updated: July 2018

In July 2015, the Hawaii State Building Code Council adopted the 2015 IECC with state-specific amendments. The new codes took effect on July 1, 2015. However, until each county adopts the 2015 IECC, the counties of Hawaii, Maui, and Honolulu enforce the 2006 IECC; Kauai, the 2009 IECC. 

Last Updated: October 2018

Idaho has adopted 2015 IECC commercial provisions, which took effect as of January 1, 2018. There are a few jurisdictions that adopted the 2015 suite of codes in 2017, including: Boise, Rathdrum, Idaho Falls, Ammon, Sun Valley, Rupert, Kuna, Sandpoint, Bannock County, Blaine County, Minidoka County, and Bear Lake County. Heyburn adopted the 2015 IRC codes only.

Last Updated: June 2018

By law Illinois is required to adopt the latest IECC, although the Capital Development Board may recommend amendments. Current code, effective January 2016, requires commercial construction to meet 2015 IECC standards with reference to ASHRAE 90.1-2013. 

Last Updated: July 2017

The Indiana Energy Conservation Code is state-developed and mandatory statewide. For commercial buildings (commercial and residential buildings with three or more dwelling units) the code references ASHRAE standard 90.1-2007 as of May 6, 2010. Executive Order 08-14, signed by Governor Mitch Daniels on June 28, 2008, requires all new state buildings to earn LEED silver certification.

Last Updated: August 2017

The Iowa State Energy code is mandatory statewide for commercial buildings, although jurisdictions are free to adopt stricter codes. As of March 2014, commercial buildings must comply with the 2012 IECC, with reference to ASHRAE 90.1 – 2010 with state-specific amendments.

Last Updated: July 2018

Kansas is a home-rule state and thus has no statewide commercial building code. In April 2007, the 2006 IECC became the applicable standard for new commercial and industrial structures. However, jurisdictions in the state are not required to adopt the code.

Last Updated: August 2017

As of October 1, 2014, projects constructed under the 2013 Kentucky Building Code (KBC) must comply with the 2012 IECC and ASHRAE 90.1-2010.

Last Updated: July 2018

Effective July 2011, ASHRAE Standard 90.1-2007 applies to all private commercial buildings built or remodeled as well as state-owned construction. 

Last Updated: July 2018

The Maine Uniform Building and Energy Code (MUBEC) was established legislatively in April 2008 through P.L. 699, setting the 2009 IECC and ASHRAE 90.1-2007 as the mandatory for commercial and public buildings statewide, effective June 1, 2010 with a six-month transition period. In 2011, P.L. 408 changed mandatory enforcement requirements for the Maine Uniform Building and Energy Code (MUBEC) to municipalities with populations over 4,000 starting December 1, 2010 for municipalities that had existing building codes and December 1, 2012 for municipalities that did not have existing building codes. For municipalities with a population less than 4,000 enforcement of the statewide code is voluntary. This change means that 89 of Maine’s 533 municipalities (based on 2010 census data) are required to provide enforcement of energy codes, representing 60% of the state’s residential population. The Technical Codes and Standards Board is currently working on the adoption of the 2013 versions of ASHRAE 62.1, 62.2, and 90.1. Maine is working to adopt the 2015 IECC for commercial buildings.

Last Updated: July 2018

Effective January 1, 2015, the 2015 Maryland Building Performance Standards are mandatory statewide and reference the 2015 ICC Codes, including the 2015 IECC, for all new and renovated commercial buildings. § 12-503 of the Maryland Code requires the Department of Housing and Community Development to adopt the most recent version of the IECC within eighteen (18) months after it is issued and may adopt energy conservation requirements that are more stringent than the codes, but may not adopt energy conservation requirements that are less stringent. Each locality in the state must adopt and begin enforcement of the code within 12 months of state adoption. 

Last Updated: September 2018

The Board of Building Regulations and Standards (BBRS) has adopted the 9th edition of the MA state building code. The updated code went into effect in August 2016, and the energy chapters reference the IECC 2015 and ASHRAE 90.1-2013, with strengthening amendments. The Board also updated the state stretch energy code to exceed the baseline state code by approximately 10% for new construction. The stretch code is now adopted in approximately two thirds of the state population.

Last Updated: July 2018

The 2009 Michigan Uniform Energy Code became effective March 9, 2011 and is mandatory statewide for residential and commercial buildings. Commercial buildings are required to comply with ASHRAE 90.1-2007. The state has begun the process of updating the commercial building energy code to the ASHRAE 90.1-2013 standard, which is expected to go into effect September 20, 2017.

Last Updated: August 2017

Minnesota's commercial building code is mandatory statewide. The commercial energy code is consistent with ANSI/ASHRAE/IES Standard 90.1-2010 and /or the 2012 IECC. It went into effect June 2, 2015.

Last Updated: July 2018

Mississippi is a home-rule state, although its commercial energy codes are mandatory statewide. In the 2013 Regular Session, the Mississippi Legislature passed and Governor Bryant signed laws setting the mandatory energy code standard for commercial and state-owned buildings as ASHRAE 90.1-2010, which took effect on July 1, 2013. Jurisdictions can adopt more stringent codes.

Last Updated: August 2017

Missouri is a home-rule state and thus has no mandatory state-wide codes. As of July 1, 2015, state-owned commercial buildings must comply with the 2015 IECC. Executive Order 09-18, issued in 2009, requires that “all new state construction, buildings being constructed for lease by the state, and significant renovations and replacement of energy-using equipment shall be at least as stringent as the most recent energy efficiency standards of the IECC.” In response to the Executive Order, the Office of Administration, Division of Facilities Management, Design and Construction (OA-FMDC) developed and adopted a State Building Energy Efficiency Design Standard (BEEDS). Missouri maintains a database of building code adoptions in local jurisdictions. Approximately 50% of the state’s population is covered by the 2009, 2012, or 2015 IECC or equivalent codes.

Last Updated: June 2018

Montana's commercial building code, codified in ARM Title 24, Chapter 301.160, is mandatory statewide. The commercial building code requires compliance with the 2012 IECC with amendments or ASHRAE 90.1-2010.

Last Updated: July 2018

Nebraska is a home-rule state, but its commercial energy code, referred to as the Nebraska Energy Code (NEC), is mandatory statewide. Commercial buildings must comply with the 2009 IECC with reference to ASHRAE 90.1 – 2007, with amendments. Local jurisdictions can adopt any code that is more stringent than the NEC, and two municipalities have adopted the 2012 IECC: Gretna and Fremont. The Energy Office has conducted a study on the impact of the 2015 IECC, and is awaiting the final report.

Last Updated: August 2017

On July 1, 2015, the 2012 IECC became mandatory for commercial buildings, with ASHRAE Standard 90.1-2010 as an acceptable compliance path. While the code is not enforced statewide, a significant number of localities have adopted it. Las Vegas has not adopted commercial energy codes in recent years. Local jurisdictions are not allowed to adopt less-efficient energy codes. 

Last Updated: August 2018

Effective April 1, 2010, the New Hampshire State Building Code for commercial buildings is based on the 2009 IECC with references to ASHRAE 90.1-2007. The code is mandatory statewide. The NH Building Code Review Board is currently reviewing the 2015 IECC.

Last Updated: August 2017

The 2015 New Jersey Uniform Construction Code for residential and commercial buildings is mandatory statewide as of September 2015. The commercial codes are based on ASHRAE 90.1-2013. The code includes a modification to Section R402.4.1 (Building thermal envelope) of the IECC/2015 which allows for either a visual inspection with checklist or [blower door] testing for compliance with the air barrier and insulation aspects of the building thermal envelope requirements. If testing is used, the 2015 criteria of 3 air changes per hour is the criteria to meet. 

For existing buildings, the Rehabilitation subcode (NJAC 5:23-6) applies certain energy conservation provisions of the new codes based on the scope of the project.

Last Updated: July 2018

The 2009 New Mexico Energy Conservation Code (NMECC) is based on the 2009 IECC with state-specific amendments for commercial building codes. ASHRAE Standard 90.1-2007 is an acceptable compliance path through Chapter 5 of the 2009 IECC. All areas of the state are covered by local building jurisdictions and must meet or exceed the state minimum code. Because localities are permitted to adopt stretch codes, the City of Santa Fe and Town of Taos have adopted more stringent building codes.

Last Updated: July 2016

On March 9, 2016, the Fire Prevention and Building Code Council voted to adopt major updates to the New York State Energy Conservation Construction Code, incorporating the 2015 International Energy Conservation Code, ASHRAE 90.1-2013 and 2016 Energy Code Supplement. Effective October 2016, commercial buildings must comply with the 2015 IECC or ASHRAE 90.1-2013.

The State Fire Prevention and Building Code Council is empowered to adopt higher or more restrictive standards upon the recommendation of local governments. New York State began developing a stretch energy code with contributions from an advisory group and technical working groups represented by state and local government, utilities, design professionals, building trades and advocacy groups.  Named NYStretch-Energy, this state stretch code will be marketed statewide for optional local adoption in the second quarter of 2017.

Last Updated: July 2018

The 2012 North Carolina Energy Conservation Code (NCECC) is mandatory statewide for commercial buildings. The commercial code is based on the 2009 IECC, with substantial strengthening amendments and also references ASHRAE 90.1-2010.

Last Updated: July 2018

North Dakota is a home rule state and has no statewide mandatory energy codes. The state recently adopted the 2015 IECC as its voluntary commercial code. Approximately 83% of the state’s population lives in a jurisdiction that has adopted the ND State Building Code which includes the 2009 IECC.

Last Updated: August 2017

Ohio's commercial energy code is mandatory statewide and references both the 2009 IECC and ASHRAE 90.1-2007. However, the state is in the process of adopting the 2012 IECC and ASHRAE 90.1-2010 for commercial construction.

Last Updated: August 2017

Oklahoma has in place mandatory statewide building codes for residential and commercial buildings buildings. The Oklahoma Uniform Building Code Commission (OUBCC) reviews and recommends building codes for residential and commercial construction. Commercial buildings must comply with the 2915 ICC/IBC standards, however, the energy chapter references the the 2006 IECC.

Last Updated: July 2018

The 2014 Oregon Energy Efficiency Specialty Code used the 2010 Oregon Energy Efficiency Specialty code as a base document, and new amendments made strengthening the 2010 OEESC, including updating lighting power density tables to equal to ASHRAE 90.1-2013 where the 2010 OEESC did not already meet or exceed 90.1-2013. 2010 OEESC was equivalent in stringency to 2012 IECC (and ASHRAE 90.1-2010) regarding the commercial provisions. The 2014 OEESC has been verified to be equivalent to ASHRAE 90.1-2013 by the University of Oregon Energy Studies in Buildings Laboratory. The commercial code went out for proposed changes in 2017 and is currently in the proposal review process, using 2018 IECC as a baseline (OR amendments will likely exceed 2018 IECC). Also part of the commercial code update process is a target in a recent executive order (EO 17-20) that includes equivalent performance for aspects of ASHRAE 189.1 by October 1, 2022. The targets in this Executive Order provide an aggressive timeline for Oregon commercial energy code, which are being considered as part of the current cycle and will be considered in the next code cycle to meet the October 1, 2022 effective code date.

Last Updated: June 2018

Pennsylvania's commercial energy code is mandatory statewide. Commercial buildings must comply with the 2009 IECC, with reference to ASHRAE 90.1 – 2007. All 2,562 jurisdictions have mandatory building energy codes for residential and commercial construction. The PA Uniform Construction Code Review and Advisory Counil recently recommended adoption of the 2015 I-Code (some with amendments) to the PA Labor and Industry Secretary. The Regulation will be effective October 1, 2018.

Last Updated: June 2018

On July 1, 2013, Rhode Island formally adopted the 2012 and ASHRAE 90.1-2010 IECC for commercial buildings, with state-specific amendments. The code went into effect on October 1, 2013 and is mandatory statewide. The Rhode Island commercial code pulls some strengthening amendments from the 2015 IECC however also weakens provisions of the code. One weakening amendment divides the state into two climate zones; the ICC published code has only one climate zone for Rhode Island. While Rhode Island is a home rule state, towns are not permitted to adopt a code that is different from the state's. In 2013, Rhode Island mandated that all state buildings adhere to the International Green Construction Code. While there is no current stretch code, as part of the Rhode Island’s Energy Efficiency Procurement Plan, a Building Codes & Standards Initiative has been approved by the RI Public Utilities Commission, and a stated feature is the development of a “stretch” code targeting “15% more energy than buildings constructed according to the prevailing path.” This effort is being pursued in conjunction with the RI Building Code Commission and the RI Builder’s Association.

Issued in December, 2015, Executive Order 15-17 directs the Office of Energy Resources to coordinate with the Energy Efficiency and Resource Management Council, National Grid, and the Green Building Advisory Committee to establish a voluntary aspirational or stretch building code based on the International Green Construction Code or equivalent by 2017. Rhode Island now has a voluntary stretch code for commercial and residential buildings.

Last Updated: June 2018

On January 1, 2013, the 2013 South Carolina Energy Standard became effective. The commercial provisions reference the 2009 IECC as well, including that code’s reference to ASHRAE Standard 90.1-2007 as an alternative compliance path. Local jurisdictions may adopt more stringent energy codes.

Last Updated: August 2017

South Dakota has no mandatory statewide energy codes for commercial construction, however most jurisdictions have adopted codes based on the 2015 IECC. Codes are adopted by jurisdiction voluntarily. For commercial construction, ASHRAE 90.1 or IECC compliance is required by reference in the 2012 IBC, which is the mandatory statewide commercial building standard in state law unless local jurisdictions have either opted out of it or specifically adopted another code.

Last Updated: October 2018

State building codes adoption and enforcement efforts fall under the purview of the State Fire Marshal’s Office within the Department of Commerce and Insurance (C&I). Any changes to building energy code must comply with the state’s rule-making procedures. On August 19, 2015, C&I conducted a rulemaking hearing to adopt the 2012 IECC for commercial and state-owned buildings. The permanent rules were filed with the Secretary of State on May 6, 2016 and went into effect on August 4, 2016. See https://www.energycodes.gov/adoption/states/tennessee for additional information. 2006 IECC applies to Moderate-hazard facility industrial, Group F-1; Low-hazard factory industrial, Group F-2; Moderate-hazard storage, Group S-1; and Low-hazard storage, Group S-2 buildings.

However, because Tennessee is a “home rule” State, significant variation exists in codes adoption and enforcement at the local level. Under Tennessee statute, all local jurisdictions must adopt a residential energy code that is within seven years of the most recently published energy code. However, all local jurisdictions may also opt out of adoption with a two-thirds majority vote of the local governing body. In addition, local jurisdictions cannot be required to adopt a local code that is more stringent than the one adopted by the State, but they may voluntarily choose to adopt an updated code version. If opting out, the vote must be completed after each local election cycle. C&I does not maintain a list of local commercial building code adoptions. To date, 86 jurisdictions have opted in to the state residential building code (apply the statewide building code to their jurisdiction and utilize the state’s building permit system and building inspectors), 80 jurisdictions have opted out (building codes are not recognized nor enforced), and 264 jurisdictions are exempt (building codes are adopted locally, meeting or exceeding the statewide standard; exempt jurisdictions hire their own inspectors and all paperwork is administered locally and audited on a 3 year cycle).

The State began implementation and enforcement of adopted energy codes for new building projects in July 2011. The State Fire Marshal’s Office requires a State building permit for new residential and certain commercial construction in areas of the State, except those where an exempt local government is enforcing a residential or commercial building code itself or where the local government has notified the Department it has opted out of the law. Building construction projects subject to code enforcement by the State Fire Marshal’s Office are required to obtain a State building code permit prior to commencing construction. The Department verifies contractors' licensure as part of the permitting process.  

Last Updated: July 2018

Texas' building codes are mandatory for commercial construction. Commercial and multi-family buildings must comply with the 2015 IECC and state-funded buildings must meet the ASHRAE 90.1 – 2013 standard. For all buildings, jurisdictions can choose to adopt more stringent standards.

Last Updated: August 2017

Utah’s Uniform Building Code (UUBC) for commercial building energy codes is mandatory statewide. Commercial construction must comply with the 2015 IECC. While localities may adopt stretch codes, it is a difficult process to do so. Localities may only adopt stretch codes if approved through the state legislative process. Amendments may not be adopted at the local level. As a result, none have adopted stretch codes.

Last Updated: June 2018

Vermont’s commercial building energy code is mandatory statewide. Effective March 1, 2015, the RBES references the 2015 IECC with Vermont-specific amendments. ASHRAE 90.1-2013 is accepted as an alternate compliance path. The state is required by statute to update its codes every three years. 

Vermont has developed Commercial Stretch Energy Standards that will be used for Act 250 projects.

Last Updated: August 2017

Virginia’s Uniform Statewide Building Code (USBC) is mandatory statewide for commercial buildings. Commercial buildings must comply with the 2012 IECC, with reference to ASHRAE 90.1-2010. The state is currently reviewing the 2015 IECC

Last Updated: July 2018

The 2015 Washington State Energy Code is a state-developed code that is mandatory statewide. The 2015 version of the commercial code is developed using a “best of” approach, selecting from ASHRAE 90.1-2013 and the 2015 IECC. HVAC systems, lighting power and additional efficiency package options have been further modified to achieve additional energy savings. The City of Seattle adopts an energy code that achieves greater savings than the Washington State Energy Code.

The Washington State Code Develpment Group was awarded the Jeffery A. Johson Award, in part to recognize our recent accomplishments. 

Last Updated: July 2018

West Virginia's commercial building code is mandatory statewide; however, adoption by jurisdictions is voluntary. The 2013 West Virginia Legislature passed a bill updating the state’s building energy code to follow ASHRAE 90.1-2007 for commercial buildings. The new commercial code became effective September 1, 2013.

Last Updated: July 2018

In May 2018, Wisconsin updated its commercial building energy codes to reference the 2015 IECC/ASHRAE 90.1-2013, albeit substantial weakening amendments.

Last Updated: October 2018

Wyoming's commercial building code is voluntary. Known as the ICBO Uniform Building Code, it is based on the 1989 MEC and may be adopted and enforced by local jurisdictions. Some jurisdictions have adopted more stringent codes than the voluntary standard: the 8 most populated cities and counties in Wyoming have an energy code that meets or exceeds the IECC 2006 or equivalent.

Last Updated: August 2017