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 Reviewed: August 2020

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 reviewed: September 2020

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 2018 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: September 2019

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 Reviewed: September 2019

 

 In May 2018, the CEC adopted the 2019 Building Energy Efficiency Standards for nonresidential and high-rise residential buildings and hotels, which take effect on Jan. 1, 2020. The Standards were officially published by the ICC as the California Energy Code (CEC) on July 1, 2019. The Standards protect indoor air quality through MERV 13 filters (also for low-rise residential) and by continuing significantly higher outdoor air requirements than ASHRAE 62.1. The Standards made strong upgrades to LED-based lighting levels, expanded demand response control requirements, and adopted in collaboration with the Office of Statewide Health Planning and Development, the first energy efficiency standards for hospitals, among other changes. 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. This is a greater energy savings than the 7.9% savings that DOE found for the Standard 90.1-2016 over Standard 90.1-2013. Compared to the 2016 Standards, the 2019 Standards result in an aggregate 10.7% improvement in nonresidential building energy efficiency, further extending the margin of savings for the 2019 Standards compared to Standard 90.1-2016.

Last Updated: September 2020

Colorado is a home-rule state, but under state statute, local jurisdictions are required to adopt one of the three most recent versions of the International Energy Conservation Code at a minimum, upon updating any other building code. 

The construction of health care and K-12 school facilities is regulated by the State of Colorado Division of Fire Prevention and Control which has adopted the 2015 IECC for these facility types. 

The 2018 IECC is the minimum building energy code for the construction of state-owned facilities.

Factory-built nonresidential structures and hotels, motels, and multi-family dwellings in areas of the State where no building codes exist, must meet the 2015 IECC.

Last Reviewed: May 2020

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: July 2019

Delaware adopted the commercial provisions of 2018 IECC and ASHRAE 90.1-2016 effective June 11, 2020.  Secretary’s Order No: 2020-CCE-0014 was signed on April 28, 2020, approving the proposed amendments to 7 DE Admin. Code 2101: Regulations for State Energy Conservation Code. The final regulation and Secretary's Order was published in the June 1st Monthly Register of Regulations and with an effective date of June 11, 2020. The regulations adopt the 2018 IECC and ASHARE 90.1-2016 in there entirety by reference.  The energy codes come in to force 6 months after the effective date. Residential and commercial codes are reviewed triennially by the Delaware Energy Office within the Department of Natural Resources and Environmental Control.

Last Updated: September 2020

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 Reviewed: September 2020

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 Reviewed: September 2020

 

The 2020 Georgia State Minimum Standard Energy Code, based on the 2015 IECC with state specific amendments, went into effect January 1, 2020.

Last Reviewed: August 2020

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 Reviewed: September 2019

The Idaho State Legislature adopted the 2018 IECC commercial provisions with amendments during the 2020 legislative sessions; these codes will take effect on January 1, 2021. This code adoption will replace Idaho’s current building code standards and bring all jurisdictions with building codes up to the 2018 IECC standard.

The 2018 IECC suite of codes was amended to meet Idaho needs. The changes included: energy rating index table for Idaho’s climate zones; and window u-factors and insulation tables based on Idaho’s climate zones. Approximately 96% of Iocal jurisdictions are covered by building codes adopted by the state.

Last Reviewed: September 2020

By law Illinois is required to adopt the latest IECC, although the Capital Development Board may recommend amendments. Current code, effective July 2019, requires commercial construction to meet 2018 IECC standards with reference to ASHRAE 90.1-2016. 

Last reviewed: July 2019

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 Reviewed: September 2019

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 Reviewed: September 2020

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 Reviewed: September 2019

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 Reviewed: September 2019

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

Last Reviewed: September 2019

In 2019, the Maine Legislature enacted three important amendments to building codes. First, Public Law (PL) 391 established that the Maine Uniform Building and Energy Code (MUBEC) must update the code from the 2009 IECC to the 2015 or a newer version, that it must be kept up to date with the latest version of the IECC, and required that it be applied in every municipality in Maine, regardless of population. (Pursuant to existing law, enforcement of the code is voluntary in municipalities having fewer than 4,000 customers, representing about 40% of the population). Second, PL 517 modified and improved the oversight and training of code enforcement officers. Third, PL 392 required the MUBEC to establish a stretch code that may be adopted by any municipality. In 2019, the Technical Codes and Standards Board formally decided to adopt the 2015 IRC, IEBC, and IECC and commenced a rulemaking process to update the Maine code.

Last Reviewed: June 2020

Effective March 25, 2019, the 2018 Maryland Building Performance Standards are mandatory statewide and reference the 2018 ICC Codes, including the 2018 IECC, for all new and renovated commercial buildings.§ 12-503 of the Public Safety article requires the Maryland Department of Labor 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. Modifications (e.g., innovative approach, design, equipment, or method of construction) are allowed if the modification can be demonstrated to offer performance that is at least the equivalent to the requirements of: 1.  the International Energy Conservation Code; 2. Chapter 13, “Energy Efficiency”, of the International Building Code; or 3. Chapter 11, “Energy Efficiency”, of the International Residential Code (see §12–503(b)(iii)) of the Public Safety Article). Each locality in the state must adopt and begin enforcement of the code within 12 months of state adoption. 

Last Updated: September 2020

The Board of Building Regulations and Standards (BBRS) has adopted the IECC 2018 with MA amendments as part of the 9th edition of the MA state building code. The updated code became available on Feb 8, 2020,  with the 2015 code expiring on Aug 8, 2020. Due to Covid-19 the BBRS in considering extending the end date for the 2015 code to Jan 1, 2021. The new energy chapters reference the IECC 2018 and ASHRAE 90.1-2016, with strengthening amendments. Notable strengthening amendments include: adoption of the IECC solar-ready appendix CA, building envelope backstop provisions, updated lighting power density requirements, requirements for an EV ready parking space at most new commercial buildings, and requiring 3 options in section C406. The Board update also impacts the state stretch energy code for large commercial buildings which continues to exceed the ASHRAE 90.1-2013 standard plus section C406 amendments by 10% on either a site energy or source energy basis.

Commercial strengthening amendments include: adoption of the IECC solar-ready appendix CA, building envelope backstop provisions, updated interior and exterior lighting power density requirements, requirements for an EV ready parking space at most new commercial buildings, and requiring 3 options (IECC requires 1) in section C406. The code update also indirectly impacts the state stretch energy code for large commercial buildings which continues to exceed the ASHRAE standard 90.1-2013 plus C406 by 10% on either a site energy or source energy basis. 

Last reviewed: August 2020

On May 23, 2017 Michigan updated the commercial energy code based on the ASHRAE 90.1-2013 standard with some Michigan specific amendments. This code became effective on September 20, 2017.

Weakening amendments have been adopted for both the residential and commercial codes. Per analysis by the Midwest Energy Efficiency Alliance (MEEA), the Michigan-specific amendments to the residential code reduced the efficiency of the standard (2015 IECC) by 11%; the Michigan-specific amendments to the commercial code reduced the standard (ASHRAE 90.1-2013) by 1%.

Last Updated: August 2020

Minnesota's commercial building code is mandatory statewide. The commercial energy code is consistent with the commercial provisions of the 2018 IECC-CE chapters 2 (CE) to 4 (CE) and 6 (CE), and shall be administered by any municipality that has adopted the code. It went into effect March 2020.

Last Updated: August 2020

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 Reviewed: September 2020

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, 2015, or 2018 IECC or equivalent codes.

Last Reviewed: September 2020

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 Reviewed: August 2020

Nebraska is a home-rule state, but its commercial energy code, referred to as the Nebraska Energy Code (NEC), is mandatory statewide. Commercial buildings, starting July 1, 2020, must comply with the 2018 IECC/NEC with reference to ASHRAE 90.1 - 2016, with administrative amendments. Local jurisdictions can adopt any code that is more stringent than the NEC. The Energy Assistance Division of the Nebraska Dept. of Environment and Enegy, is awaiting the results of a compliance study on commercial building compliance with the 2009 IECC.

Effective July 1, 2020, the Nebraska Eneergy Code will be based on the 2018 IECC with no amendments.

Last Updated: September 2020

On July 1, 2018, the 2018 IECC became mandatory for commercial buildings, with ASHRAE Standard 90.1-2016 as an acceptable compliance path. While the code is not enforced statewide, a significant number of local governments have adopted it. Local governments are not allowed to adopt less-efficient energy codes.

Last updated: September 2020

Effective September 2019, the NH legislature adopted the 2015 ICC codes with state-specific energy related amendments to the 2015 IECC. The code is mandatory statewide. The NH Building Code Review Board is currently reviewing the 2018 ICC chapters and may propose them, with amendments, for adoption in 2021.

Last Reviewed: May 2020

Compliance with the energy provisions of the New Jersey Uniform Construction Code (UCC) for residential and commercial buildings by the aforementioned code is mandatory statewide as of September 21, 2015, with a six-month grace period for the previously adopted codes to be used to not disrupt projects currently in design-stage. The current commercial codes are based on ASHRAE 90.1-2013 and the Department of Community Affairs will be updating energy codes to ASHRAE 90-1-2016 in the summer of 2019.

On September 21, 2015, the Department adopted revisions to the 2015 editions of the International Building Code (IBC), International Residential Code (IRC), International Mechanical Code (IMC), International Fuel Gas Code (IFGC), and International Energy Conservation Code (IECC) as the building, one- and two-family dwelling, mechanical, fuel gas, and energy subcodes, respectively, of the UCC and the 2014 edition of the National Electrical Code (NEC).

In order to implement the most recent published technical standards, in keeping with its statutory charge (N.J.S.A. 52:27D-120), the Department proposes the 2018 editions of the IBC, IRC, IMC, IFGC, IECC, and NSPC, and the 2017 edition of the National Electrical Code (NEC) to update the above referenced subcodes of the UCC with amendments. These proposed amendments, expected to be adopted by August 2019, reflect the changes to the IBC/2018, IRC/2018, IMC/2018, IFGC/2018, IECC/2018, NSPC/2018, and NEC/2017 that modify the codes to align with New Jersey conditions and law.

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 reviewed: July 2019

In August 2020, the New Mexico Construction Industries Commission (CIC) voted to adopt the 2018 New Mexico Energy Conservation Code (NMECC), based on the 2018 IECC with state-specific amendments. The code applies statewide. Local building jurisdictions must meet or exceed the state code which becomes the 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. The City of Albuquerque is also planning to adopt a strech code beyond the 2018 IECC. Builders can also use the updated NM Energy Conservation Code Residential Applications Manual to comply when building a passive solar or high mass home.

Last reviewed: August 2020

On December 6, 2019 the Fire Prevention and Building Code Council voted to adopt major updates to the Energy Conservation Construction Code of New York State, incorporating the 2018 International Energy Conservation Code (IECC) and ASHRAE 90.1-2016. Effective May 12, 2020, commercial buildings must comply with the 2020 Energy Conservation Construction Code of New York State. 

Under New York State Energy Law, Article 11, local energy codes are permitted by law, as long as the local energy code is more stringent than the state energy code. The state developed 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.   NYStretch Energy Code-2020 was published July 2019 for voluntary, local adoption.  The Commercial Provisions of NYStretch are approximately 7% more efficient than the 2020 New York State Energy Conservation Construction Code.  To date, NYStretch has been adopted by New York City, the City of Beacon and Hastings-on-Hudson. The City of Ithaca includes NYStretch as an optional path in their Green Building Code.  NYSERDA is promoting and supporting local adoption in dozens of additional jurisdictions throughout the state and also worked with the State University of New York Construction Fund to pass a directive that all construction on its campuses will meet NYStretch provisions.

Last Updated: June 2020

The 2018 North Carolina Energy Conservation Code (NCECC) is mandatory statewide for commercial buildings. The commercial code is based on the 2015 IECC with amendments. State Building Code Council develops new codes on a six-year cycle. Most recent update was effective January 1, 2019. (Source)

 

Last Updated: September 2020

North Dakota is a home rule state and has no statewide mandatory energy codes. The state recently adopted the 2018 IECC as its voluntary commercial code. Approximately 91% of the state’s population lives in a jurisdiction that has adopted the ND State Building Code which includes the 2018 IECC.

Last Reviewed: September 2020

Ohio's commercial energy code is mandatory statewide and references both the 2012 IECC and 2010 ASHRAE 90.1 with amendments.

Amendments were made to both the commercial and residential model code energy requirements.  Clarifying amendments to the commercial energy provisions include adopting newer model energy code text relating to roof replacment, repair, and recovering and computer rooms/data centers.  Weakening amendments were made relating to circulating water pump controls and automatic receptacle controls.

Local jurisdictions are not permitted to adopt energy codes that conflict with the energy codes adopted by the state.

Last reviewed: August 2020

Oklahoma has in place mandatory statewide building codes for residential and commercial 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 2006 IECC.

While Oklahoma does not currently require all jurisdiction to adopt a statewide energy code, counties are allowed to participate in PACE programs for energy efficiency through the Oklahoma Energy Indepence Act. In fact, on May 20th, 2020, Governor Kevin Stitt signed into law SB 1592 expanding the scope of the current Oklahoma Energy Indepence Act to allow all properties but single family residences to be eligible for the program. 

The jurisdictions listed here have adopted their own building codes. They represent approximately 40% of the population of Oklahoma, or 1,507,066 people (based on the 2010 Census).

Last Reviewed: September 2020

Chapter 13 of the 2019 Oregon Structural Specialty Code (2019 OSSC) utilizes ASHRAE 90.1-2016 as the construction standards. The 2019 OSSC has been effective since October 1, 2019, with a 90-day phase-in period. To demonstrate compliance with Part I of the energy code, Construction documents for new buildings shall include the Oregon Zero Energy Ready Compliance Form, including a ZERO Code Calculator report. Minor amendments are primarily for integration with the OSSC. The amendments are contained in the 2019 Oregon Zero Energy Ready Commercial Code (OZERCC). Oregon intends to update Chapter 13 of the 2019 OSSC with ASHRAE 90.1-2019 as the construction standards when the DOE makes its ‘Determination’ and COMcheck has updated. The commercial code update process is part of a target in Executive Order from 2017 (EO 17-20) which includes equivalent performance for aspects of ASHRAE 189.1 by October 1, 2022. A new Executive Order this year (EO 20-04) builds on EO 17-20 and provide an aggressive target for both Residential and Commercial codes to be 60% better than the baseline year of 2006, by the year 2030.

Last Updated: September 2020

In May 2018, Pennsylvania adopted of the 2015 IECC (some with amendments) effective October 1, 2018.  In June 2018, Philadelphia City adopted the 2018 International Building Code for commercial construction.

Last reviewed: July 2020

On July 1, 2019, Rhode Island formally adopted the 2015 IECC and ASHRAE 90.1-2010 for commercial buildings, with state-specific amendments. The code went into effect on August 1, 2019 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. As part of the Rhode Island’s Energy Efficiency Procurement Plan, a Building Codes & Standards Initiative was approved by the RI Public Utilities Commission, and a stated feature is the continued support and maintenance of a “stretch” code targeting “15% more energy efficiency than buildings constructed according to the prevailing path.” This effort was 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 currently has a voluntary stretch code for both commercial and residential buildings.

Last Updated: September 2020

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 Reviewed: September 2019

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 Reviewed: September 2019

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. For certain types of commercial facilities—specifically Moderate-hazard factory 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—2006 IECC applies in lieu of 2012 IECC under these rules. See https://www.energycodes.gov/adoption/states/tennessee for additional information. 

As is noted above, because Tennessee is a “home rule” State, significant variation exists in codes adoption and enforcement at the local level. 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. C&I does not maintain a list of local commercial building code adoptions.

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 Reviewed: September 2020

 

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 Reviewed: September 2020

 

During the 2019 legislative session, the Utah legislature passed HB 218, which will adopt the 2018 IECC for commercial provisions in its entirety. 

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 Reviewed: September 2020

The Vermont Commercial Building Energy Standards is mandatory statewide. The current CBES became effective March 1, 2015, and references the 2015 IECC with Vermont-specific amendments. ASHRAE 90.1-2013 is accepted as an alternate compliance path. The 2020 CBES will become effective September 1, 2020 and is based on the 2018 IECC and the ASHRAE Standard 90.1-2016 and also includes Vermont specific additions such as more stringent envelope, mechanical, and lighting requirements as well as solar and electric vehicle infrastructure requirements.The state is required by statute to update its codes every three years.  

Last Updated: August 2020

With an effective date of September 4, 2018, Virginia's Uniform State Building Code (USBC) has been updated to incorporate energy efficiency provisions for commercial buildings of the 2015 IECC and ASHRAE 90.1-2013.  All buildings with permit application date of September 4, 2019 or after must comply. There were no weakening amendments to the commercial energy code.

Commercial buildings had previously been required to comply with the 2012 IECC, with reference to ASHRAE 90.1-2010. 

Last reviewed: September 2020

The 2018 Washington State Energy Code is a state-developed code that is mandatory statewide. Based originally on the 2018 IECC it has been extensively modified to reach state specific energy reduction targets incorporating parts of ASHRAE 90.1, ASHRAE 90.4 as well as unique features. The Washington State Energy Code provides savings equivalent to the ASHRAE 90.1 -2016.
  
In December of 2018 the state building code council adopted the 2018 Washington State Energy Code - Commercial. The evaluation of code outcomes notes that the incorporated code changes achieve 35% percent reduction in whole building energy use compared to the 2006 edition of the WA Code. The state energy office has completed a preliminary comparison of the result of the Washington Study to the Energy Savings Analysis with ANSI/ASHRAE/IES Standard 90.1-2016 completed by DOE.  

While it is difficult to make direct comparisons between these studies, it's estimated that the state code provides equivalent saving to ASHRAE 90.1 – 2016.  The new code will be implemented Nov. 2020.  The 2018 Washington State Energy Code specifically implements a standard that directly addresses carbon emissions reductions by adopting a unique version of ASHRAE 90.1 Appendix G. In addition, Washington State adopted the Total System Performance Ratio method developed by PNNL, and have explicitly incorporated carbon emissions evaluation criteria.   

Washington State is noted as the only state with energy code improvement requirements in statute. RCW 19.27a.160 (2009) “The council shall adopt state energy codes from 2013 through 2031 that incrementally move towards achieving the seventy percent reduction in annual net energy consumption”.

Last reviewed: June 2020

West Virginia's commercial building code is mandatory statewide; however, adoption by jurisdictions is voluntary. The state now follows ASHRAE 90.1-2010. In February 2019, the Governor signed SB177 authorizing the legislative rule filed by the Fire Commission on July 25, 2018 to amend the State Building Code to update the ANSI/ASHRAE/IESNA Standard 90.1 from the 2007 edition to the 2010 edition.

Last Reviewed: September 2020

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

Last Reviewed: September 2019

 

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 Reviewed: September 2019