Plumbing permits in New Jersey

01Who can perform plumbing work

Under state rules, plumbing may be performed only by a licensed master plumber, an authorized plumbing contractor, or employees working under a master plumber's supervision. A plumbing business works through a licensed master plumber acting as its bona fide representative, who is responsible for code compliance.

Homeowner exemption: a homeowner doing plumbing in their own single-family dwelling is exempt from the licensing requirement. Permits and inspections still apply where the work requires them. Check with your construction office first.

02Which codes apply

Framework

New Jersey Uniform Construction Code (N.J.A.C. 5:23), enforced locally

Plumbing subcode

National Standard Plumbing Code (not the International Plumbing Code)

Fuel gas subcode

International Fuel Gas Code

Code edition

New Jersey adopts updated editions periodically, with transition periods. Check the NJ Department of Community Affairs "current codes" page for the edition in force on your permit date.

03How a permit typically works

1. Application to the municipal construction office, with the plumbing technical section, usually prepared by the master plumber.
2. Plan review where required.
3. Permit issued; work begins.
4. Inspections by the plumbing subcode official (for example rough and final).
5. Approval or certificate, depending on the project.

Ordinary maintenance does not require a permit under the UCC, and some minor work has a simplified process. The construction official decides what falls into each category, so ask before assuming.

04Lead service line replacement

A 2021 state law (P.L.2021, c.183) requires community water systems to replace all lead service lines in their service area, generally within 10 years. If your utility notifies you about a lead line, the replacement is usually coordinated by the utility. See lead service lines.

05Frequently asked questions

06Sources

Related: Who can do plumbing work in NJ · NYC permits · New Jersey areas