# Building Codes

> A free reference to building codes as adopted into law across the United States, in plain language.

- Canonical: https://harth.build/resources/building-codes/

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## Direct answer and reference scope

Building Codes is presented here as a reference within the the listed code collection collection for United States. A free reference to building codes as adopted into law across the United States, in plain language. Use the [International Code Council code library](https://codes.iccsafe.org/codes) 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 is a searchable reference transcription, not an official code publication, legal opinion or confirmation that this 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. Review scope: official verification path added; code text and current local applicability have not been independently reviewed._

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Building codes vary by state, city, discipline and effective date. Start with the adoption guides, then confirm the official text and amendments with the authority having jurisdiction.

## Adoption and amendment guides

- [Building codes by US state](https://harth.build/resources/building-codes/us-states.md) — current editions, effective dates and AHJ paths.
- [City building-code amendments](https://harth.build/resources/building-codes/cities.md) — readable guides for Seattle, Denver and Austin.
- [Elevator codes by state](https://harth.build/resources/building-codes/elevators.md) — A17.1 edition and emergency-communication screening table.

The older chapter transcriptions in this library are historical references. A page naming an older edition does not establish the code currently in force for a project.

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