Minnesota Building Code: Which Editions Are Adopted

Direct answer

2020 Minnesota State Building Code, effective 31 March 2020 in Minnesota. 2018 IBC, IRC and IFC adopted by reference with Minnesota amendments, with residential energy rules built on the 2012 IECC and commercial energy rules built on ASHRAE 90.1-2019. The commercial energy code was updated separately to ASHRAE 90.1-2019, effective 5 January 2024. The Department of Labor and Industry is reviewing the 2024 I-Codes for the next State Building Code, and opened rulemaking on a 2024-based residential energy code with a request for comments published on 2 February 2026; no proposed rule has been published yet. This was checked on 2026-10-01 against Minnesota Department of Labor and Industry, Construction Codes and Licensing Division, which is the source that controls. The cross-state comparison further down this page comes from the ICC adoption chart dated January 2024, so where the two disagree the record above is the newer one.

Content and cited inputs reviewed by Harth team · Published 2026-09-07 · Updated 2026-10-01.

Which codes has Minnesota adopted now?

2020 Minnesota State Building Code, effective 31 March 2020.

2018 IBC, IRC and IFC adopted by reference with Minnesota amendments, with residential energy rules built on the 2012 IECC and commercial energy rules built on ASHRAE 90.1-2019.

Transition: The commercial energy code was updated separately to ASHRAE 90.1-2019, effective 5 January 2024. The Department of Labor and Industry is reviewing the 2024 I-Codes for the next State Building Code, and opened rulemaking on a 2024-based residential energy code with a request for comments published on 2 February 2026; no proposed rule has been published yet.

Local adoption: The State Building Code is the minimum construction standard throughout Minnesota, but a municipality enforces it only once it adopts the code by local ordinance. The State Fire Code applies statewide.

Checked 2026-10-01 against Minnesota Department of Labor and Industry, Construction Codes and Licensing Division. Confirm the edition and effective date for the specific permit jurisdiction before relying on it.

The cross-state record

For comparison across states, every I-Code the ICC Master I-Code Adoption Chart (January 2024) tracks, as it records Minnesota. Where this disagrees with the record above, the record above is newer:

Minnesota has a recorded edition year for 7 of the 17 codes: 2018 for the building, residential, fire, mechanical, fuel gas and existing buildings codes; 2012 for the residential energy code. The green construction, commercial energy, property maintenance and wildland-urban interface codes appear as adopted by individual state or local agencies rather than as a statewide standard, so whether they apply depends on the permit jurisdiction for the project address. No adoption at all is recorded for the plumbing, private sewage, swimming pool and spa, performance, zoning and green building standard codes.

Source: ICC Master I-Code Adoption Chart (January 2024).

How Minnesota compares with its neighbours

Statewide editions in force, checked 2026-10-01; “Local” means no state adoption, “(limited)” a state adoption for some buildings only, and * a state-titled code built on that edition.

Wisconsin, Iowa, North Dakota and South Dakota differ from Minnesota on the building code alone. A practice working across that border is working to two editions, whatever the office standard says.

Where Minnesota sits in the national record

Of the 50 states and the District of Columbia, 3 enforce the 2018 IBC statewide, 27 a later edition, 4 an earlier one, and 17 have no statewide IBC edition in force. Minnesota is therefore behind most of the country on the building code, which matters for anyone carrying a detail or a code-analysis sheet in from a neighbouring state.

The residential code and the residential energy code are on different editions here — 2018 against 2012. 7 states show a split like this, which is why the energy code is worth confirming as a separate question rather than assuming it moved with the residential code.

Across all 17 codes the January 2024 ICC chart tracks, Minnesota has a recorded edition for 7, which ranked it 26th of 51. A low count is not a gap in regulation — it usually means the state legislates through its own documents, or leaves the discipline to local adoption.

What the chart does and does not tell you

The chart's own legend matters more than the numbers:

• An edition year means one or more state or local agencies adopted that edition. It does not mean every building in the state is designed to it.
• “Some jurisdictions only” is the chart's X: the code is in use somewhere in the state but is not the standard for all buildings.
• “Not adopted” is a blank cell — no state or local jurisdiction reported adopting that code.
• “State-written code” means the state publishes its own document in place of the model edition, so the model text is a reference, not the law.

ICC states plainly that not every jurisdiction notifies it of an adoption, and this chart is dated January 2024. Treat it as the starting point for a search, never as the answer.

How to confirm the edition that governs a Minnesota project

1. Open Minnesota Department of Labor and Industry, Construction Codes and Licensing Division and find the currently adopted code list with its effective date.
2. Check whether the permit authority for the project address is the state or a local programme with its own adoption.
3. Read the state amendments alongside the model edition — an amended table or definition changes the requirement even when the edition matches.
4. Record the permit application date. A code change usually applies from an effective date, and applications filed before it are normally reviewed under the previous edition.
5. Get the answer in writing from the authority having jurisdiction before it drives a design decision.

Minnesota code-basis worksheet

Fill this in once per project and keep it with the drawing set. Every row is a question a plan reviewer can ask, and the answer changes with the address and the application date, not with the state.

This worksheet records a determination; it does not make one. The authority having jurisdiction decides which edition and which amendments apply.

Where can you explore related guidance?

• Explore all code adoption guidance
• Wisconsin Building Code: Which Editions Are Adopted
• Iowa Building Code: Which Editions Are Adopted
• North Dakota Building Code: Which Editions Are Adopted
• South Dakota Building Code: Which Editions Are Adopted

Sources and method

Adopted editions transcribed from the ICC Master I-Code Adoption Chart (January 2024), reproduced with the chart's own legend so an “X” is not mistaken for a statewide adoption. ICC notes that not all jurisdictions report their adoptions and publishes updates at iccsafe.org/adoptions. The current edition, its effective date and the state amendments are published by Minnesota Department of Labor and Industry, Construction Codes and Licensing Division, which controls.

Source links

• iccsafe.org

• iccsafe.org

• dli.mn.gov