Introduction

A tradesperson certificate allows drainers, gasfitters, plumbers, roof plumbers and water plumbers to work with minimum supervision.

If you gain further qualifications that allow you to work in additional classes, you can add or change a class on your tradesperson certificate. You can do this at a Service NSW Centre.

Note: If the expiry date of your certificate is less than 6 weeks away you need to renew it before you can vary the classes.

What you need

To apply to change the class on a tradesperson certificate you need to provide the following supporting documents with your completed application form:

Payment

When you apply you need to pay a fee.

To pay at a service centre, check the payment options available.

Some service centres do not accept cash payments.

How to change the class

  1. Download and complete the Application form – Individual licence or Certificate – PDF.
  2. Gather the required supporting documents.
  3. Visit a service centre with your documents and payment.

Note: Your application may take longer to assess if there is missing or incomplete information.

More information

To do any medical gas work in NSW you need a medical gas licence, regardless of the work cost or whether it's residential, commercial or industrial.

Last published: 10 August 2026

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