Primary Contact for State Adoption

Robin Yochum
Program Manager

Governor's Office of Energy

755 North Roop Street
Suite 202
Carson City, NV 89701
United States

Secondary Contact for State Adoption

Jennifer Taylor
Deputy Director for Intergovernmental Relations

Governor's Office of Energy

555 E. Washington Ave.
Las Vegas, NV 89101
United States

Regional Energy Efficiency Organization

Jim Meyers
Director Buildings Efficiency Program

Southwest Energy Efficiency Project (SWEEP)

United States

State Profile

Code Type: Commercial Residential
Current State Code 2018 IECC and ASHRAE 90.1-2016 2018 IECC with Amendments
Effective Date
Adoption Date
Enforcement Mandatory Statewide Mandatory Statewide
State Amendment No Yes
Can use COM/REScheck Yes Yes


Commercial Residential
Current Model Code ASHRAE Standard 90.1-2016 2018 IECC
Yes Yes
Previous Model Code
ASHRAE Standard 90.1-2007
Previous Model Code
2009 IECC

State Code Analysis

Code Type: Residential Commercial
Energy Efficiency
State Amendment Yes No
Amendment Summary

Specific Residential Proposals that Reduce Energy Efficiency:

  • R402.1 Log Homes
    •  Adds an exception to the residential thermal envelope requirements for log homes complying with ICC-400.
    • This standard describes an alternative method for log home compliance with the building thermal requirements in the IECC.

Residential Proposals that Improve or Protect Energy Efficiency: 

  • Table R402.1.2, Table R402.1.4 Improved window efficiency
    • Lowers vertical fenestration U-factors in CZ 3 & 4 from 0.35 to 0.32 and CZ 5-8 from 0.32 to 0.30.
  • R402.1.2 Heated Slab Insulation
    • R-5 insulation has been added as a requirement in Table R402.1.2 for heated slabs in all climate zones.
  • R402.4.1.1 Air Barrier & Insulation
    • Added language to the air barrier and insulation installation table will specify the following:
    • Supply and return register boots must be sealed to the subfloor or drywall.
    • Recessed lighting must be sealed to the finished surface.
    • Space behind electrical/phone boxes need to be insulated.
    • ICC/RESNET Standard 380 now referenced as envelope leakage testing option.
  • R403.3.6 Buried Ductwork in Attic
    • Ducts that are tested to have a maximum leakage rate of 1.5 cfm25/100 SF to the outside, are insulated with ≥ R-8 insulation, and have at least R-19 insulation above and to the sides of the ducts, count as being in conditioned space.
  • R403.6.1 ERV/HRV Fan Efficiency
    • A minimum fan efficiency of 1.2 cfm/watt has been added for HRV and ERVs.
  • R404.1 Lighting Equipment
    • A proposal to increase the percentage of high efficacy lamps in permanently installed fixtures from 75% to 90% passed. This will remain a mandatory requirement in the code.
  • Table R406.4 Energy Rating Index
    • Target less stringent, but clarified role of on-site renewable energy.
    • Increases maximum ERI scores from (51-55) to (57-62) and clarifies that where on-site renewable energy is included for compliance, the building shall meet the mandatory requirements of R406.2 and the thermal envelope shall meet or exceed the requirements of the 2015 IECC.
    • ERI scores will be increased from 55 to 61 in CZ 5 and from 51 to 57 in CZ3.
    • Where on-site renewable energy is included in the ERI calculation, buildings must meet or exceed the thermal envelope requirements in Table R402.1.2 of the 2015 IECC.
    • The 2009 IECC envelope backstop will remain in effect for buildings without onsite generation.
    • RESNET Standards Referenced
    • The ANSI/RESNET/ICC 301-2014 is now a referenced standard in the code as the basis for the ERI calculation. Additionally, ANSI/RESNET/ICC 380-2016 is now a referenced standard for building envelope testing.

Model Code Savings Potential

Statewide Savings Potential (2010-2030) Residential Commercial
Cost $0.67B $0.54B
Energy (primary) 57MBtu 65MBtu
Consumer Cost Savings Residential
per Home
per 1,000 ft2
Annual ($) $7 $103
Annual (%) 0.5%
Life-cycle (30 year) $95 $2100
Simple Payback 4.4 years 0.0 years
Positive Cash Flow 0.7 years


Code Type: Residential Commercial
Field Study No No
Training Program No No


Additional Information

    Nevada's first energy code, "Energy Conservation Standards for New Building Construction," was adopted on January 1, 1978. This code, based on ASHRAE Standard 90-75, was written by the state and formulated by the Nevada Department of Energy. All cities and counties were required to enforce the energy code requirements. The Nevada Department of Energy was disbanded in 1983. Between 1983 and 1986, the state did not support or enforce this energy code.

    In 1985 the legislature gave the Nevada Office of Community Services authority to formulate new statewide standards for energy conservation in new buildings. Adopted on July 8, 1988, the "Regulations for the Conservation of Energy in New Building Construction" were formulated based on the 1986 MEC with minor state amendments. This code is applicable only in areas where the local jurisdiction had not previously adopted an energy code. This remains the basis for the statewide energy code. The Nevada Office of Community Services was dissolved in the fall of 1993. Currently, the state does not actively support or enforce this energy code.

    In 1995 the Nevada State Energy Office sought authority to upgrade the state energy codes via legislation submitted to the state legislature, but the Senate Finance Committee effectively killed the bill by failing to act on it. The legislation would have adopted the 1992 MEC for all low-rise residential buildings and the codified version of the ANSI/ASHRAE/IES 90.1-1989 for all other buildings. The state is pursuing voluntary compliance strategies. The 1995 legislature imposed a two year moratorium on the adoption of new state regulations.

    The Nevada State Energy Office is currently working to link the 1992, 1993, and 1995 editions of the MEC to a home energy rating system. Nevada's EPAct certification, extended one year, reflects the Nevada legislature's inaction.

    On May 28, 2009, Gov. Jim Gibbons signed into law legislation (SB 73) that revises the process of updating the state's building energy codes by establishing the standards adopted by the Nevada State Office of Energy as the minimum standards for building energy efficiency and conservation. The law requires local governments to adopt the codes set by the Office of Energy and to enforce them (they are also allowed to adopt more energy efficient standards provided they give notice to the Office of Energy).

    The law mandates the adoption of the most recent version of the International Energy Conservation Code (IECC) and requires the adoption of the most recent updated version of the IECC every three years. The Office of Energy must still hold public hearings in three different locations in the state after giving 30 days notice of such hearings before adopting any new standards.

    On November 10, 2011, The Nevada State office of Energy adopted the 2009 IECC with an effective date of July 1, 2012.  Jurisdictions in southern Nevada adopted the 2009 IECC effective July 5, 2011

    On June 8, 2009, Governor Gibbons signed into law SB 395, containing a provision that requires the State Public Works Board to adopt standards and performance guidelines concerning the efficient use of water and energy for state-owned and operated buildings. Effective July 1, 2009, this provision amends Chapter 341 of NRS. The State Public Works Board may consider standards as set forth in LEED, Green Globes, Energy Star, ASHRAE, FEMP, and IECC.

    Assembly Bill 3 (22nd Special Session) became law as NRS 701.220 which enforces adoption of regulations for energy conservation in buildings, exemptions, applicability and enforcement, as well as procedure for adoption of building energy codes. The state energy code must be updated to the most recent version every three years. Adoption of the state energy code is required by all local government entities authorized by law to adopt and enforce a building code. On June 15, 2007, Governor Gibbons signed Assembly Bill 621 into law. Among the provisions passed in the wide-reaching energy efficiency and renewable energy bill is an update making various changes relating to the application procedures for and provision of tax abatements and exemptions based upon the Leadership in Energy and Environmental Design Green Building Rating System.

    The city or county enforces the code except for state-owned and -funded buildings, which are regulated by the Nevada Public Works Board (NPWB). The NPWB generally requires the plans to be stamped by a registered engineer or architect to indicate compliance with the energy code requirements. Plans and specifications must be submitted when required by the provisions of the MEC. Field inspections are performed by the local jurisdiction during established construction inspections. Interpretations are the responsibility of the local jurisdiction.

    The required envelope compliance pathways, plan submittal requirements, and requirements for engineer signatures are those contained in the 2018 IECC.