Plumbers install, maintain, and repair the water supply, hot water, drainage, gas fitting, and sewerage systems that keep Australian homes and businesses running. From unblocking a kitchen drain to replacing an ageing hot water system or roughing-in pipework for a new bathroom, a licensed plumber ensures every connection meets the Plumbing Code of Australia and relevant state regulations. Homeowners most commonly need a plumber for leaking taps, burst pipes, toilet repairs, hot water unit replacements, and backflow prevention device testing. Because faulty plumbing can cause water damage, health risks from sewage, and even gas leaks, all regulated plumbing work in Australia must be carried out by a licensed professional who can issue a compliance certificate on completion.

Consumer and Business Services — Regulatory Overview

Consumer and Business Services is South Australia's principal regulator for the building and construction industry, responsible for licensing all plumbers who perform regulated work in the state. The CBS issues and renews licences, sets minimum requirements for licensees, investigates complaints, and takes disciplinary action against non-compliant operators.

As of February 2026, Consumer and Business Services oversees 13,720 licensed plumbers across South Australia, covering 1 licence class. This represents one of the most comprehensive licensing regimes in Australia, designed to protect consumers and maintain industry standards.

Plumber Licence Types in South Australia

Licence Type	Description
Plumbing Contractor Licence	Contract to carry out plumbing work
Plumbing Worker Registration	Carry out plumbing work under a licensed contractor
Restricted Plumbing Licence	Limited plumbing work such as roof plumbing or irrigation

Requirements to Become a Licensed Plumber in South Australia

Certificate III in Plumbing (CPC32420 or equivalent)
Completed 4-year apprenticeship
Contractor: 2 years post-qualification experience
Public liability insurance (minimum $5 million)
Professional indemnity insurance for contractors

Plumber Licence Costs in South Australia

Application Fee

$370 for plumbing worker registration

Renewal Fee

$370 annually

Renewal Period

1 year

Penalties for Unlicensed Work

Unlicensed plumbing work in SA can result in fines up to $50,000 for individuals. Consumer and Business Services can also order rectification and pursue disciplinary action.

Exemptions — Plumber Work You Can Do Without a Licence

Replacing a tap washer, jumper valve, or shower head
Clearing a blocked drain with a plunger
Connecting a dishwasher or washing machine to existing outlets
Minor adjustments to garden irrigation not connected to mains

How to Verify a Plumber in South Australia

Verifying a plumber's licence in South Australia is straightforward and should be done before engaging any tradesperson for work. You can use TradieVerify's free search tool to instantly look up any South Australiaplumber by name, licence number, or business name. Alternatively, you can search directly through Consumer and Business Services at https://www.cbs.sa.gov.au.

When verifying, confirm: (1) the licence is current and active, (2) the licence class covers the type of work you need, (3) there are no conditions or restrictions on their licence, and (4) there is no disciplinary history. A legitimate plumber will have no hesitation providing their licence number for verification.

How to Hire a Plumber in South Australia

1
Ask about their backflow prevention accreditation
If you need annual backflow device testing — required by most water authorities — confirm the plumber holds a current backflow prevention accreditation, as not every licensed plumber is endorsed to test and certify these devices.
2
Check whether they cover both water and drainage
In several states, plumbing and drainage are separate licence classes. A plumber licensed for water supply work may not be licensed for sewer and stormwater drainage, so confirm their licence covers the type of work you need.
3
Confirm they will issue a compliance certificate
Licensed plumbers are required to lodge a compliance certificate with the relevant authority for regulated work. Ask upfront whether they will provide one — it is your proof the job was done to code.
4
Ask who supplies the fixtures and fittings
Some plumbers mark up materials significantly. Ask whether you can supply your own WaterMark-certified tapware and fittings, or get a separate materials quote so you can compare retail prices.
5
Verify they carry specialist tools for your job
Jobs like CCTV drain inspections, pipe relining, or thermostatic mixing valve testing require specialist equipment. Ask whether the plumber owns this gear or will subcontract, as subcontracting can add cost and delay.

Red Flags When Hiring a Plumber

Refuses to provide a compliance certificate:A licensed plumber is legally required to lodge a compliance certificate for regulated work. Refusal or claims that "it's not necessary for this job" when the work clearly involves new pipework or fixture installation suggests the tradesperson may not be properly licensed.
No WaterMark-certified products:All plumbing products installed in Australia must carry the WaterMark certification. If a plumber proposes using uncertified imported fittings to save money, the installation will not comply with the Plumbing Code and could void your insurance.
Cannot explain the drainage plan:For any work involving sewer or stormwater connections, a competent plumber should be able to explain how waste will flow, where vents are located, and how the work ties into existing drains. Vague answers suggest a lack of planning that can lead to blocked drains or failed inspections.

Typical Plumber Costs in South Australia

Hourly Rate

$75 – $125

Callout Fee

$55 – $95

Common Plumber Jobs & Estimated Costs

Job	Estimated Cost
Fix leaking tap or replace washers	$75 – $190
Install or replace hot water system	$1,140 – $3,325
Unblock drain (standard)	$95 – $330
Replace toilet or cistern	$240 – $570
Install new bathroom tapware	$140 – $380

Plumber Complaints & Disputes in South Australia

Consumer and Business Services (CBS)

131 882 Website

How to Lodge a Complaint

1Write to the tradesperson outlining the issue and requesting rectification within a reasonable period
2If unresolved, lodge a complaint with CBS online or by calling 131 882
3CBS may attempt conciliation between you and the tradesperson
4CBS can investigate licensed tradespeople and take disciplinary action if warranted
5For unresolved disputes involving money, you may need to apply to SACAT or the Magistrates Court

Related Directories

Frequently Asked Questions

What is a compliance certificate and will my plumber provide one?

A compliance certificate (sometimes called a certificate of compliance) is a legal document confirming the plumbing work meets the Plumbing Code of Australia and state regulations. Licensed plumbers are required to lodge one with the relevant authority for regulated work such as new installations, re-routing pipes, or installing a hot water system. Always ask for a copy — without it, you may have difficulty selling your property or making an insurance claim.

How do I know if my hot water system needs replacing or just repairing?

Storage hot water systems typically last 8–12 years, while continuous flow (instantaneous) units can last 15–20 years. Signs it is time to replace rather than repair include rusty water from the hot tap, rumbling or banging noises from the tank, visible corrosion on the unit, water pooling around the base, or if the unit is more than 10 years old and requires a costly part. A licensed plumber can inspect the sacrificial anode and thermostat to give you an honest assessment.

Can a plumber also do gas fitting work?

Many plumbers hold a combined plumbing and gas fitting licence, but this is not automatic. Gas fitting is a separate licence endorsement in most states. If your job involves gas appliance installation or gas pipe work, ask to see proof of a current gas fitting licence or endorsement — do not assume a plumbing licence covers gas.

What licence types are available for plumbers in South Australia?

South Australia offers 3 licence types for plumbers: Plumbing Contractor Licence, Plumbing Worker Registration, Restricted Plumbing Licence. Each licence class authorises different scopes of work, so check that your plumber's licence covers the specific work you need.

How much does a plumber licence cost in South Australia?

The application fee for a plumber licence in South Australia is $370 for plumbing worker registration. Renewal costs $370 annually and must be renewed every 1 year.

What plumber work can I do without a licence in South Australia?

In South Australia, some minor plumber tasks are exempt from licensing requirements: Replacing a tap washer, jumper valve, or shower head; Clearing a blocked drain with a plunger; Connecting a dishwasher or washing machine to existing outlets. Any work beyond these exemptions must be done by a licensed plumber.

How many licensed plumbers are there in South Australia?

As of February 2026, there are 13,720 licensed plumbers registered with Consumer and Business Services in South Australia. This includes all licence classes: Plumbing, Gas Fitting & Electrical.

How do I verify a plumber's licence in South Australia?

You can verify any South Australia plumber's licence using TradieVerify's free search tool or directly through Consumer and Business Services at https://www.cbs.sa.gov.au. Enter the plumber's name or licence number to confirm their registration status, licence class, and any disciplinary history.