Building Codes

The State of Maine has amended the Maine Uniform Building and Energy Code (MUBEC). Municipalities that enforce the MUBEC, shall enforce the amended adoption as of April 7, 2025.

EFFECTIVE UNTIL APRIL 7, 2025 - MUBEC is made up of the following codes and standards:


The International Code Council (ICC) Codes:

  • 2015 International Residential Code (IRC)
  • 2015 International Building Code (IBC)
  • 2015 International Existing Building Code (IEBC)
  • 2015 International Energy Conservation Code (IECC)
  • 2015 International Mechanical Code (IMC)

The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) Standards:

  • 62.1 - 2016 (Ventilation for Acceptable Indoor Air Quality)
  • 62.2 - 2016 (Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings)
  • 90.1 - 2016 (Energy Standard for Buildings except Low-Rise Residential Buildings) editions without addenda.

American Society of Testing Materials (ASTM)

  • E-1465-2008, Standard Practice for Radon Control Options for the Design and Construction of New Low-Rise Residential Buildings.

EFFECTIVE BEGINNING APRIL 7, 2025 - MUBEC has adopted the following codes and standards:


The International Code Council (ICC) Codes:

  • 2021 International Residential Code (IRC)
  • 2021 International Building Code (IBC)
  • 2021 International Existing Building Code (IEBC)
  • 2021 International Energy Conservation Code (IECC)
  • 2021 International Mechanical Code (IMC)

The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) Standards:

  • 2019 ASHRAE 62.1 (Ventilation for Acceptable Indoor Air Quality)
  • 2019 ASHRAE 62.2 (Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings)
  • 2019 ASHRAE 90.1 (Energy Standard for Buildings except Low-Rise Residential Buildings) editions without addenda.

American Society of Testing Materials (ASTM)

  • E-1465-2008, Standard Practice for Radon Control Options for the Design and Construction of New Low-Rise Residential Buildings.
  •  IBC Base Climate Data
    • Ground Snow Load 70 lbs
    • Wind Speed 107 mph - 3 seconds Sustained Gust
    • Frost Depth 5 feet
    • No Special seismic requirements
    • No hurricane requirements

 Maine has adopted the national model codes and standards with amendments.  The amendments are listed in Rule Chapters 1-7. Chapters can be found under MUBEC Rules and Laws.