# Wyoming Building Codes in 2026: Editions, Scope and AHJ

> Wyoming's adopted 2024 I-Codes, 2026 NEC effective date, State Fire Marshal scope, and the local-enforcement checks architects need before permitting.

- Canonical: https://harth.build/resources/building-codes/us-states/wyoming/
- Last updated: 2026-09-05

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## Direct answer and reference scope

Wyoming Building Codes in 2026: Editions, Scope and AHJ is a Harth adoption and amendment guide for Wyoming. Wyoming's adopted 2024 I-Codes, 2026 NEC effective date, State Fire Marshal scope, and the local-enforcement checks architects need before permitting. Use the [Wyoming State Fire Marshal](https://wsfm.wyo.gov/) to confirm the code edition currently adopted for the project, and compare the model text with state amendments, local amendments, effective dates and the permit authority's interpretation. The [ICC code library](https://codes.iccsafe.org/codes) is the model-code publication path. This Harth page summarizes adoption records and amendment sources; it does not reproduce the controlling code, provide a legal opinion or confirm which edition controls a particular address. Record the project jurisdiction, application date, occupancy, construction type and amendment set before relying on a section. Where this page conflicts with an official publication or the authority having jurisdiction, the official source controls.

_Authored and prepared by Harth from the linked agency records. Review scope: adoption status and source paths verified; project-specific applicability and local interpretation require AHJ confirmation._

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## Direct answer

Wyoming’s State Fire Marshal lists the **2024 International Building, Fire, Existing Building, Mechanical and Fuel Gas Codes** as the state-adopted editions. Wyoming uses the **2026 National Electrical Code from July 1, 2026**. The state list does not present the IRC, IECC or plumbing code as a single statewide package, so residential, energy and plumbing requirements must be confirmed with the city, county and other agency serving the project.

![Labeled code-chapter diagram: Wyoming Building Codes in 2026: Editions, Scope and AHJ](https://efwwel0vyt9vy5so.public.blob.vercel-storage.com/images/building-codes/us-states/wyoming/index/diagram-1344.webp)

*Wyoming's adopted 2024 I-Codes, 2026 NEC effective date, State Fire Marshal scope, and the local-enforcement checks architects need before permitting.*

## Current statewide code baseline

| Subject | Listed edition | Official source |
| --- | --- | --- |
| Building | 2024 IBC | [Wyoming State Fire Marshal](https://wsfm.wyo.gov/) |
| Fire | 2024 IFC | [Wyoming State Fire Marshal](https://wsfm.wyo.gov/) |
| Existing buildings | 2024 IEBC | [Wyoming State Fire Marshal](https://wsfm.wyo.gov/) |
| Mechanical | 2024 IMC | [Wyoming State Fire Marshal](https://wsfm.wyo.gov/) |
| Fuel gas | 2024 IFGC | [Wyoming State Fire Marshal](https://wsfm.wyo.gov/) |
| Electrical | 2026 NEC from July 1, 2026 | [Wyoming State Fire Marshal](https://wsfm.wyo.gov/electrical-safety/electrical-safety-updates) |
| Residential / energy / plumbing | Confirm locally | Not identified as a complete statewide package on the Fire Marshal list |

The Council on Fire Prevention and Electrical Safety voted to move the listed fire-and-life-safety codes from the 2021 to 2024 editions in 2024. The [rulemaking statement of reasons](https://wyoleg.gov/arules/2012/rules/ARR24-027P.pdf) records that action.

## Who is the authority having jurisdiction?

Wyoming Statute 35-9-121 allows the State Fire Marshal to delegate complete enforcement authority to qualifying municipalities and counties. A delegated local authority must maintain standards equivalent to or more stringent than the state baseline, and a more stringent local provision prevails. The Fire Marshal retains defined state responsibilities, including state-owned or leased buildings unless authority has been transferred.

Start with the project address, then establish:

1. whether the city or county has delegated building, fire or electrical authority;
2. which local ordinance adopted the code and its amendments;
3. whether the project falls within the State Fire Marshal’s plan-review scope; and
4. the edition tied to the permit application date.

## Wyoming project code-basis worksheet

| Item | Project entry |
| --- | --- |
| Project address and parcel | — |
| City / county | — |
| Building and fire AHJ | — |
| Electrical AHJ | — |
| Adopted IBC / IEBC / IFC editions | — |
| Residential, energy and plumbing editions | — |
| Local amendments or more-stringent provisions | — |
| Permit vesting / application date | — |
| Written AHJ confirmation | — |

Do not treat “Wyoming uses the 2024 IBC” as the whole code analysis. The adopted state standard, delegated local authority, project type and other discipline codes must be read together.

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