Maine · Building code

The building code in force in Maine now.

MUBEC: 2021 IBC / 2021 IRC / 2021 IECC, statewide, amended version effective April 7, 2025. Enforced by Municipal building officials enforce MUBEC (mandatory at 4,000+ population); Technical Building Codes and Standards Board / Office of Community Affairs sets the code statewide. Verified on the primary source, re-checked weekly.

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Building code in Maine

Verified on the source

In force

MUBEC: 2021 IBC / 2021 IRC / 2021 IECC, statewide, amended version effective April 7, 2025

MUBEC adopts the 2021 IBC, IRC, and IECC statewide; municipalities with population of 4,000 or more must enforce it (smaller towns may opt in). An amended version took effect April 7, 2025.

Source: primary document

Who enforces it

Municipal building officials enforce MUBEC (mandatory at 4,000+ population); Technical Building Codes and Standards Board / Office of Community Affairs sets the code statewide

Statewide layer. County and city amendments sit on top; the building view resolves them from your ZIP.

What changes next

In force

In force; no newer edition adoption date announced

Questions about the building code in Maine

Which building code applies in Maine today?

MUBEC: 2021 IBC / 2021 IRC / 2021 IECC, statewide, amended version effective April 7, 2025. MUBEC adopts the 2021 IBC, IRC, and IECC statewide; municipalities with population of 4,000 or more must enforce it (smaller towns may opt in). An amended version took effect April 7, 2025.

Who enforces the building code in Maine?

Municipal building officials enforce MUBEC (mandatory at 4,000+ population); Technical Building Codes and Standards Board / Office of Community Affairs sets the code statewide.

What changes next for the building code in Maine?

Nothing is scheduled. The rule above stays in force until the state adopts a newer edition or amends the program; AHJ Radar re-checks the source weekly.

Other areas in Maine

Everything in force in Maine

Fire codeNo general statewide edition confirmed; 25 MRSA sec.2452 rules reference NFPA 101 (Life Sa…ElevatorsElevator and Tramway Safety Program regulates elevators statewide; specific ASME A17.1/A17…BoilersBoiler/pressure-vessel certificate program under 32 MRSA c.131; certificates valid up to 1…Pools and spasPublic pools/spas licensed under 22 MRSA c.562 (DHHS); compliance inspection at least ever…Hotels and lodgingLodging places licensed by DHHS (22 MRSA c.562, 2-year inspection cycle); hotels/high-rise…Workplace safetyFederal OSHA covers private employers; Maine State Plan covers only state/local government…

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