# US Building Code Adoption by State

> Which edition of the IBC, IRC, IECC and the rest of the I-Codes each US state is recorded as adopting — with the record's date on the page and the state source to confirm it against.

- Canonical: https://harth.build/resources/code-adoption/

“Which code applies?” is the first question on any project and the one most often answered from memory. It has three parts, and only the first is national: which **edition** the jurisdiction adopted, when it became **effective**, and which **amendments** ride on top of it.

These pages answer the first part for all fifty states and the District of Columbia from the ICC Master I-Code Adoption Chart, reproduced with the chart's own legend so that an “X” — some jurisdictions, not all buildings — is never mistaken for a statewide adoption. The chart is dated **January 2024**, and that date is printed on every page rather than hidden, because ICC itself notes that not every jurisdiction reports its adoptions.

The other two parts cannot be answered nationally, so each page ends where the answer actually lives: the state's own current-code publication, the amendment list, and a worksheet for recording what the authority having jurisdiction confirmed.

_Prepared by Harth as generated collection navigation. Evidence and review scope are recorded on each linked page._

## Pages

- [Alabama Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/alabama-building-code-adoption.md)
- [Alaska Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/alaska-building-code-adoption.md)
- [Arizona Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/arizona-building-code-adoption.md)
- [Arkansas Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/arkansas-building-code-adoption.md)
- [California Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/california-building-code-adoption.md)
- [Colorado Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/colorado-building-code-adoption.md)
- [Connecticut Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/connecticut-building-code-adoption.md)
- [Delaware Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/delaware-building-code-adoption.md)
- [District of Columbia Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/district-of-columbia-building-code-adoption.md)
- [Florida Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/florida-building-code-adoption.md)
- [Georgia Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/georgia-building-code-adoption.md)
- [Hawaii Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/hawaii-building-code-adoption.md)
- [Idaho Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/idaho-building-code-adoption.md)
- [Illinois Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/illinois-building-code-adoption.md)
- [Indiana Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/indiana-building-code-adoption.md)
- [Iowa Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/iowa-building-code-adoption.md)
- [Kansas Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/kansas-building-code-adoption.md)
- [Kentucky Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/kentucky-building-code-adoption.md)
- [Louisiana Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/louisiana-building-code-adoption.md)
- [Maine Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/maine-building-code-adoption.md)
- [Maryland Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/maryland-building-code-adoption.md)
- [Massachusetts Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/massachusetts-building-code-adoption.md)
- [Michigan Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/michigan-building-code-adoption.md)
- [Minnesota Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/minnesota-building-code-adoption.md)
- [Mississippi Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/mississippi-building-code-adoption.md)
- [Missouri Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/missouri-building-code-adoption.md)
- [Montana Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/montana-building-code-adoption.md)
- [Nebraska Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/nebraska-building-code-adoption.md)
- [Nevada Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/nevada-building-code-adoption.md)
- [New Hampshire Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/new-hampshire-building-code-adoption.md)
- [New Jersey Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/new-jersey-building-code-adoption.md)
- [New Mexico Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/new-mexico-building-code-adoption.md)
- [New York Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/new-york-building-code-adoption.md)
- [North Carolina Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/north-carolina-building-code-adoption.md)
- [North Dakota Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/north-dakota-building-code-adoption.md)
- [Ohio Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/ohio-building-code-adoption.md)
- [Oklahoma Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/oklahoma-building-code-adoption.md)
- [Oregon Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/oregon-building-code-adoption.md)
- [Pennsylvania Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/pennsylvania-building-code-adoption.md)
- [Rhode Island Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/rhode-island-building-code-adoption.md)
- [South Carolina Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/south-carolina-building-code-adoption.md)
- [South Dakota Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/south-dakota-building-code-adoption.md)
- [Tennessee Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/tennessee-building-code-adoption.md)
- [Texas Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/texas-building-code-adoption.md)
- [Utah Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/utah-building-code-adoption.md)
- [Vermont Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/vermont-building-code-adoption.md)
- [Virginia Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/virginia-building-code-adoption.md)
- [Washington Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/washington-building-code-adoption.md)
- [West Virginia Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/west-virginia-building-code-adoption.md)
- [Wisconsin Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/wisconsin-building-code-adoption.md)
- [Wyoming Building Code: Which Editions Are Adopted](https://harth.build/resources/code-adoption/wyoming-building-code-adoption.md)

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