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 updated commercial code took effect January 1, 2016. Local jurisdictions may adopt more stringent codes.

Last Reviewed: August 2022

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: May 2022

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 Reviewed: December 2021

The Arkansas Energy Code for New Building Construction is mandatory state-wide for both residential and commercial buildings. The commercial energy code is the 2009 IECC, which in turn also allows ASHRAE 90.1-2007 for compliance. This code became effective on January 1, 2015. Newly constructed or remodeled state-owned buildings must comply with ASHRAE 90.1-2013.

Last Reviewed: December 2022

The 2019 California Energy Code for nonresidential and high-rise residential buildings and hotels took effect on Jan. 1, 2020. The Code protects 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 Code 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 Energy Code exceeds 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 Energy Code compared to Standard 90.1-2016.

The 2022 amendments, on a statewide basis, would annually save approximately 33 million therms of fossil fuel natural gas and 1.3 billion kWh of electricity across the combination of both residential and commercial buildings relative to the 2019 Energy Code.  This represents a reduction of 358,130 metric tons of CO2 equivalent emissions annually, and a total reduction of 71.46 million metric tons of CO2 equivalent emissions by 2050, per the Environmental Impact Report prepared as a part of the rulemaking.

Last Reviewed: September 2022

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. In 2022, a new law was passed (HB22-1362) to update the minimum building energy codes that a jurisdiction with building codes needs to adopt, upon adopting or updating any other building codes. 

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 2021 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.

As of May 2022, nearly 87% of Colorado's population is on the 2015, 2018, or 2021 IECC. Seventy-five jurisdictions, covering nearly 60% of the state's population, have adopted the 2018 or the 2021 IECC so far, with many more in the process or under consideration. 

Last Reviewed: May 2022

The Connecticut Department of Administrative Service incorporated the 2021 ICC family of codes as part of the 2022 state building code.  The 2022 Connecticut statewide building code includes the 2021 IECC with no amendments to the 2021 IECC. The 2021 IECC will be effective October 2022. (Link). 

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 reviewed: December 20222

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.

Review of the commercial provisions of 2021 IECC and ASHRAE 90.1-2019 has begun with adoption anticipated in June 2023.  Activities and events associated with the next code adoption cycle are posted on the DNREC webpage.

Last reviewed: June 2022

The District has passed new energy codes recently. Washington DC's energy codes are mandatory across the District. The 2017 DC Construction Codes consist of the 2015 International Code Council (ICC) family of model codes, the 2014 National Electrical Code, and 2013 ASHRAE 90.1, as amended by the District of Columbia Municipal Regulations (DCMR) Title 12, Sections A through M.  The 2017 DC Construction Code took effect on May 29, 2020.  Applicability and provisions for the prior editions of the code, (for Permits issued, Applications Filed, Tenant Layouts and Permit Revisions) will be governed by the Transitory Provision stipulated in section 123. (Link)

Both the commercial and residential building energy code was amended to strengthen energy efficiency in the District. Key elements of the new code require ENERGY STAR products for a variety of technologies and stringent gas efficiency. The high gas efficiencies required by this amended code remove the need for the energy efficiency utility to incentivize new construction gas projects, but moves the focus to strategic electrification for HVAC and water heating. 

The codes also include an alternative compliance pathway for net zero buildings, including LEED Zero Energy and LEED Zero Carbon, for both commercial and residential construction (link). 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: June 2022

The Building Code is the statewide building code for all construction in the state. Every local government must enforce the Building Code and issue building permits.  The Florida Building Code 7th Edition took effect Dec. 31, 2020, replacing the Florida Building Code 6th Edition. While the Florida Building Code 6th Edition was based off of the 2015 International Building Code, the Florida Building Code 7th Edition is based off of the 2018 International Building Code. Compliance with the code is mandatory for all new construction including commercial buildings.

Studies have demonstrated that deviations of the 2020 FEC from the ASHRAE 90.1-2016 Standard are small, can be considered within the margin of error, and may be considered equivalent to the original ASHRAE 90.1-2016 (link).

Last Reviewed: June 2022

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: December 2022

On December 15, 2020, the Hawaii State Building Code Council adopted the 2018 IECC with state-specific amendments.   State government buildings must comply with the code no later than December 14, 2021, and the counties must adopt the code no later than December 14, 2022.

For the link to the Hawaii Amendments to the 2018 IECC, please see the Hawaii State Building Code Council's website.

Last Reviewed: July 2022

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.

Idaho adopted the 2018 IECC standard in 2021 for all jurisidictions. New commercial buildings should be built to ASHRAE Standard 90.1-2019 in order to save energy and experience lower operational costs, which results in lower utility bills.

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.

Local jurisdictions may not adopt more or less stringent code than the current building code approved by the state legislature. 

Last Reviewed: July 2022

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: December 2022

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: July 2022

The Iowa State Energy code is mandatory statewide for commercial buildings, although jurisdictions are free to adopt stricter codes. Commercial buildings must comply with the 2012 IECC, with reference to ASHRAE 90.1 – 2010. 

Last Reviewed: July 2022

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: December 2021

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 2021

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 2021

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. In 2020, the Technical Codes and Standards Board completed its rulemaking to implement the 2015 International Energy Conservation Code, which takes effect on July 1, 2021. Pursuant to 10 MRSA §9722 6.B, MUBEC is required to ensure that both the ICC and ASHRAE codes are either the most recent edition or the edition previous to the most recent edition. As such, MUBEC is currently reviewing 2021 IECC against 2015 IECC in preparation for its adoption as Maine's energy code which is anticipated in 2022.

Last Reviewed: May 2022

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. 

Adoption of energy codes is mandatory in Maryland.  After new editions of I-codes become available from the ICC, the Department of Labor is required to adopt the new codes within 18 months. After adoption, all local jurisdictions have up to 12 months to amend & adopt these new codes for local code enforcement.

Last reviewed: July 2022

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.

Massachusetts has a statewide stretch energy code that has now been adopted by 299 of the 351 cities and towns  (link). The Stretch energy code requires performance standards to be met above and beyond the baseline code. The options for residential units are 3rd party verified HERS rating, Energy Star 3.1 certification or Passivehouse certification. For commercial buildings over 100,000 sq ft or for some load-intensive buildings over 40,000 sq ft it requires demonstrating 10% or greater energy reduction relative to ASHRAE 90.1-2013 Appendix G after incorporating the MA strengthening amendments (ie. C406).

The state's Next Generation Roadmap for Climate Policy legislation signed in March 2021 also calls for development of an opt-in net-zero stretch code that defines a net-zero building and net-zero building performance standards. 

Last reviewed: May 2022

Michigan is currently operating under the 2015c commercial energy code.  The state is currently in the process of completing an update of the commercial energy code to the most recent IECC 2021 code. Public comments were received during a series of meetings and through written comments and ended on 3/16/2022. There will be another draft released after consideration of the comments submitted and then there will be another public comment period for consideration before the final version is published. The Bureau of Construction Codes is planning to have this code finalized before the end of the calendar year.

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%.

The state has also started a low carbon purchasing policy on state procurement (including appliances) and developed an aggressive QAP green building policy for low-income housing credits. In addition to these efforts, through Governor Whitmer's ED 2020-10 required DTMB to: investigate the cost-effectiveness of energy efficiency opportunities when planning or renovating a building owned or operated by the State; reduce energy use 40% by 2040; make all major renovations of buildings and facilities carbon neutral by 2040.

Last Reviewed: June 2022

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 Reviewed: July 2022

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.

The building codes adopted by jurisdictions throughout the state are listed on the State of Missouri Data Portal.

Last Reviewed: May 2022

Montana's commercial building code, codified in ARM Title 24, Chapter 301.160, is mandatory statewide. The commercial building code requires compliance with the 2018 IECC or ASHRAE 90.1-2016.

Last Reviewed: July 2022

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 Energy Code will be based on the 2018 IECC with no amendments.

Last Updated: September 2020

In July 2021, the 2021 IECC with Electric Vehicle ready appendices was adopted for commercial buildings in Nevada with ASHRAE Standard 90.1-2016 as an acceptable compliance path. While the code is not being enforced statewide, local governments are not allowed to adopt less-efficient energy codes. 

Last Reviewed: May 2022

Effective July 2022, the NH legislature adopted the 2018 ICC codes with state-specific energy related amendments to the 2018 IRC.  The code is mandatory statewide. The NH Building Code Review Board will be reviewing the 2021 ICC codes and may propose them, with amendments, for adoption in 2023.

Last Reviewed: July 2022

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: May 2022

The ASHRAE 90.1 Standard is adopted by reference. In addition, the USDOE grant will provide training that will help builders comply. 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 stretch 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: June 2022

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 42 local governments, including New York City. The City of Ithaca includes NYStretch as an optional path in their Green Building Code. NYSERDA is promoting and supporting local adoption, and dozens of additional jurisdictions throughout the state and considering local laws to adopt NYStretch-2020.  NYStretch-2020 adoption is incentized until June 30, 2022 through NYSERDA's Clean Energy Communities Program (Link). The City of Ithaca includes NYStretch as an optional path in their Green Building Code. NYSERDA 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: July 2022

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 reviewed: July 2021

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. The state is currently going through the adoption of the 2021 ICC codes including the 2021 IECC. The codes will become effective on January 1, 2023.

Last Reviewed: June 2022

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: July 2022

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: May 2022

The Oregon Building Codes Division (BCD) produces Chapter 13 of the 2019 Oregon Structural Specialty Code (2019 OSSC) which now utilizes ASHRAE 90.1-2019 as the energy efficiency construction standards. Chapter 13 is also known as the 2021 Oregon Energy Efficiency Specialty Code (2021 OEESC). It is mandatory statewide and has been effective since April 1st, 2021, with a 6-month 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 to ASHRAE 90.1-2019 are primarily for integration with the building code administrative provisions. A few amendments allow for Oregon marketplace trade offs which neither increase nor decrease site regulated efficiency. Oregon intends to update Chapter 13 of the OSSC with ASHRAE 90.1 as the construction standards when the DOE makes its ‘Determination’ and COMcheck has updated each cycle.

The commercial code update process is part of a target in EO 17-20 which includes equivalent performance for aspects of ASHRAE 189.1 by October 1, 2022. The Executive Order from last year (EO 20-04) builds on EO 17-20 and provide an aggressive target for Commercial codes to be 60% better than the baseline year of 2006, by the year 2030. Oregon is on track to meet this goal. BCD will begin working with the Commercial and Industrial Energy Board (CIEB) and statewide stakeholders to begin work on the adoption process of ASHRAE 90.1-2022 within 180 days of its publication ( 

Last reviewed: July 2022

Pennsylvania adopted the 2018 IECC and ASHRAE 90.1 - 2016 (with some amendments), effective February 14, 2022.  In June 2018, Philadelphia City adopted the 2018 International Building Code for commercial construction.

Last reviewed: June 2022 

On June 10, 2021, Rhode Island formally adopted the 2018 IECC and ASHRAE 90.1-2010 for commercial buildings, with state-specific amendments. The code went into effect on February 1, 2022 and is mandatory statewide. The Rhode Island commercial code pulls some strengthening amendments from the 2018 IECC, however, it also weakens some 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 Rhode Island Building Code Commission and the Rhode Island 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 standards. Rhode Island currently has a voluntary stretch code for both commercial and residential buildings that went into effect February 2018.

In 2022, the Rhode Island Building Code Commission is working on adopting the next iteration of the State's building code which will be based on the 2021 International Code and the voluntary stretch code will be updated to stay ahead of the state's base code.

Last reviewed: June 2022

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: June 2022

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 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: May 2022


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: June 2022

The Vermont Commercial Building Energy Standards is mandatory statewide. The current CBES became 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 energy codes every three years. The Vermont Public Service Department (PSD) is currently in the process of updating the CBES and expect to have the new standards adopted by December, 2022 and in effect by September, 2023.

Last reviewed: June 2022 

With an effective date of July 1, 2021, Virginia's Uniform State Building Code (USBC) has been updated to incorporate energy efficiency provisions for commercial buildings of the 2018 IECC and ASHRAE 90.1-2016.  All buildings with permit application date of July 1, 2022 or after must comply. There were no weakening amendments to the commercial energy code. Sections C402.1.4.2 (including subsections) and C402.2.1 (including subsections) have been modified based on 2021 IECC provisions. Fenestration requirements for buildings facing N are more stringent than the 2018 IECC provisions. Commercial buildings had previously been required to comply with the 2015 IECC, with reference to ASHRAE 90.1-2013. 

The code development process for the 2021 USBC (which includes the 2021 Virginia Energy Conservation Code), is currently underway. The 2021 USBC will be using the 2021 I-Codes as the model codes.

Last reviewed: June 2022

The 2018 Washington State Energy Code is a state-developed code that is a mandatory minimum code statewide. Local jurisdictions have authority to adopt a reach code for non-residential structures. 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 was 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.   

The state building code council voted to adopt the 2021 code in April 2022. This code will become effective July 2023. The 2021 code changes include an updated carbon content of electricity to align with state policy, requires electric heat pumps for most space and water heating with limited exceptions, requires solar readiness for commercial buildings, in addition to a broad range of efficiency improvements. 

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”.

Executive Order 20-01 requires state government agencies in Washington to design and construct state-owned buildings to zero-energy or zero-energy capable standards, and include consideration of embodied carbon. The State Efficiency and Environmental Performance (SEEP) Office at Commerce supports construction of zero-energy buildings and has developed a Zero Energy Toolkit to help guide state projects. 

Last reviewed: June 2022

West Virginia's commercial building code is mandatory statewide; however, adoption by jurisdictions is voluntary. The state now follows ASHRAE 90.1-2010. In March 2022, the Governor signed HB4141 authorizing the legislative rule filed by the Fire Commission to amend the State Building Code to update the ANSI/ASHRAE/IESNA Standard 90.1 from the 2010 edition to the 2013 edition.

Last Reviewed: July 2022

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: June 2022


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