Plumbing Licence SA: Worker Registration and Contractor Licence Through CBS

What it is

South Australia regulates plumbing under the Plumbers, Gas Fitters and Electricians Act 1995 (SA) and the Plumbers, Gas Fitters and Electricians Regulations 2025 (SA). The 2025 Regulations replaced the earlier Plumbers, Gas Fitters and Electricians Regulations 2010 (SA) and now sit alongside the Act as the principal subordinate instrument. Consumer and Business Services, known as CBS, administers the scheme. The Act covers plumbing, gas fitting and electrical work in a single licensing regime, but the rules for each trade sit in separate parts of the legislation and regulations.

The SA scheme has two layers, and a plumbing business almost always needs both. Worker registration authorises an individual to physically perform plumbing work. A contractor licence authorises a person or company to contract or subcontract for plumbing work. A contractor licence on its own does not allow the holder to pick up a tool, and a worker registration on its own does not allow the holder to take a job under contract. The two-layer structure is built into the Act and is the cleanest practical control point for both regulators and head contractors.

Worker registration

A plumbing worker registration confirms that the holder has the qualifications and probity required to perform plumbing work in South Australia. To apply, the worker must:

• Hold a Certificate III in Plumbing or equivalent
• Demonstrate the practical experience set out in the regulations
• Pass a national police check
• Hold the relevant insurance where required by CBS

Worker registrations are issued for a term set by the Act and the 2025 Regulations and must be renewed before expiry. Builders should check the current term and renewal cycle on the CBS website before relying on a stated period, because the prescribed term has been adjusted in past amendment cycles. A registered worker can perform plumbing work only within the categories endorsed on the registration. Categories track the national plumbing licence categories, so endorsements typically include water supply, sanitary, drainage, mechanical services and roofing where the worker is qualified for them.

Contractor licence

A contractor licence is required for any person or business that contracts or subcontracts for plumbing work. The contractor licence is what allows the business to enter into agreements with customers, advertise plumbing services and engage workers. Conditions on the contractor licence determine which categories of plumbing work the business can take on.

A company applying for a contractor licence must:

• Nominate a director or officer who meets the qualification and probity requirements
• Show evidence of business management capability, usually a Certificate IV in Plumbing and Services
• Provide proof of public liability insurance
• Demonstrate that the nominated person will exercise effective day to day control of the plumbing work

If the nominated person leaves, the contractor must notify CBS and may need to nominate a replacement within a set period or risk the licence being cancelled.

Categories of plumbing work in SA

The SA scheme recognises endorsements that mirror the national plumbing competencies. The exact endorsement names and scopes are prescribed in the 2025 Regulations and the licence categories guide published by CBS. Common endorsements include:

Water supply plumbing

Installation, alteration and repair of cold and hot water supply systems, including connections to the SA Water network.

Sanitary plumbing

Fixtures and pipework that discharge to the sanitary drainage system, including fixture connections and venting.

Sanitary drainage

Below ground drainage from the building to the property boundary or on site disposal system.

Mechanical services

Heating, ventilation and air conditioning pipework that is treated as plumbing under the regulations.

Roof plumbing

Roof drainage, flashings and downpipes connecting to stormwater.

A worker can only carry out the endorsements listed on their registration. A contractor can only contract for the endorsements listed on the contractor licence. Endorsement scopes have been updated periodically, so a builder relying on a specific category should check the current CBS licence categories guide before assuming the scope has not moved.

Restricted, provisional and supervised work

CBS issues restricted registrations to workers qualified in a narrow area, for example roof plumbing only. Provisional registration covers workers awaiting full qualification recognition, including overseas qualified plumbers completing gap training. Apprentices and trainees work under the supervision of a registered worker and cannot certify their own work.

Renewal, fees and the public register

Worker registrations and contractor licences both renew on a cycle set by the Act and the 2025 Regulations. CBS publishes a public licence register so anyone can verify a plumber's registration number, endorsements, expiry date and any conditions or disciplinary action. Renewing late can leave a plumber unable to lawfully work until the renewal is processed.

Why it matters for builders

Builders engaging plumbing subcontractors in SA should record both the contractor licence and the worker registration of every plumber on site, confirm that endorsements match the scope of work and keep evidence of the licence check with the project records. Engaging an unlicensed or unregistered plumber is an offence under the Plumbers, Gas Fitters and Electricians Act 1995 (SA) and can void warranty cover on the affected work. Where a job is shared with a head builder, the CBS register check should be repeated at the point a new plumber comes on site rather than relying on a single check at project start.