Do I need a permit to hire a plumber?
Most structural, electrical, plumbing, mechanical, and exterior changes require a permit. Your plumber should pull it — never let them skip it to "save you money."
When permits are required
Generally: anything structural, electrical (new circuits), plumbing (new lines), mechanical (HVAC), exterior (roofing, siding, windows over a certain size), or that changes the building envelope. Cosmetic-only plumbing usually doesn't need one.
Who pulls the permit
The licensed plumber should pull the permit in their name — that puts liability on them. Beware any plumber who asks the homeowner to pull it; that's a sign they're not properly licensed.
Cost and timeline
Permits typically run $50–$500 depending on scope, plus inspection fees. Add 1–3 weeks to your timeline for permit issuance and inspection scheduling.
Risks of unpermitted work
Forced removal or rework at sale, insurance claim denials, fines, and reduced home value at appraisal. Unpermitted work is almost never worth the savings.
Frequently asked questions
Can I get a retroactive permit?
Often yes, but it usually requires an inspection (and sometimes opening up walls). Far more expensive than permitting upfront.
What if my plumber doesn't pull permits?
Walk away. A licensed plumber who skips permits is exposing you to massive future liability.
Do I need a permit for a simple plumbing repair?
Like-for-like repairs (replacing the same fixture in the same spot) often don't. Any new circuit, line, or structural change usually does.
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