Which building code applies to your permit
Pick a state and, if you want, a city or county, then a permit date. You get the building, residential, energy, electrical, plumbing, mechanical and fire code editions in force on that date, with the official source for each. No signup.
MT — statewide
Editions in force for a permit dated 2026-10-22.
- Building code2024
- Residential code2024
- Existing building code2024ConfirmedOfficial source
- Energy code2024
- Electrical code2023
See how a full code review reads
A PermitPrep.AI report checks a drawing set against the editions above and flags what needs attention.
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