//Glossary
Authority having jurisdiction (AHJ)
The agency with legal authority over building work at a given address: for most homes in the service area, the city's building department; for unincorporated pockets, the county. The AHJ decides what needs a permit, what edition of the code applies, and what the inspector checks.
How do I find my AHJ?
Check which city limits your address falls inside, not the mailing city on the envelope; they are not always the same. The city's building or community development department is the AHJ for a plumbing permit. Confirm current requirements with them before relying on anything general.
Guides that use this term
- › Do you need a permit to replace a water heater?
- › Do you need a permit for sewer line repair or replacement?
- › Do you need a permit for a gas line?
- › Do you need a permit for a whole-house repipe?
- › What a plumbing inspector checks, and what happens if something fails
- › What happens if plumbing work is not permitted or not up to code
- › Plumbing permits by city: who has jurisdiction across the cities we serve
- › How Done-Rite handles permits and inspections for you
- › Permitted vs unpermitted plumbing work: what the permit actually buys you
Related terms
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