Do You Need a Licensed Plumber in Queensland?

You’ve got a tap that won’t stop dripping, or a hot water system that’s quit on a Sunday, and someone offers to sort it for a lot less than a plumbing company quotes. It’s fair to wonder whether the licence actually matters. In Queensland it does for most plumbing and drainage work, and the rules are published by the Queensland Building and Construction Commission (QBCC) so you can check them yourself.

The short version for Moreton Bay homeowners:

• Most plumbing and drainage work in Queensland is regulated and has to be done by a QBCC licensed plumber or drainer.
• There are three categories of regulated work: permit work, notifiable work and minor work. All three need a licensed plumber.
• A short list of jobs is unregulated, including replacing a shower head or a tap washer, and you can do those yourself.
• You can look any plumber up through the QBCC’s Find a local contractor search before you book.

When You Need a Licensed Plumber in Queensland

For most jobs, yes. The QBCC states that most plumbing and draining work in Queensland is regulated and must be performed by a licensed plumber and drainer (QBCC, Plumbing work, retrieved 16 September 2026), and that the rule exists to protect the community’s health and safety. Regulated work splits into three categories, and every one of them needs a QBCC licence held by the person doing the work.

That licence isn’t a formality. It’s what makes the plumber accountable for the work, and for notifiable work it’s what puts a registration for that work on record with the QBCC.

What Counts as Regulated Plumbing Work in Queensland

The QBCC sets out three categories of regulated plumbing and drainage work, all of which must be performed by a QBCC licensed plumber or drainer (QBCC, Regulated plumbing work requirements, retrieved 16 September 2026).

• Permit work. Needs a permit from the local government before the work starts, applied for on a Form 1. New buildings and structures sit here.
• Notifiable work. Doesn’t need a council permit first, but must be registered with the QBCC on a Form 4 or 4a once it’s finished.
• Minor work. No prior approval and no registration, still a licensed plumber.

Notifiable work has 12 categories, listed in schedule 1 of the Plumbing and Drainage Regulation 2019 (QBCC, Categories of notifiable work, retrieved 16 September 2026). They include extending, altering, replacing or removing supply pipes, work on existing sanitary plumbing, work on existing sanitary drainage, and installing, replacing or removing a temperature control device.

The plumber has 10 business days from issuing the invoice to register notifiable work with the QBCC (QBCC, How to register notifiable work, retrieved 16 September 2026). That registration is your paper trail, so it’s worth asking for it.

Plumbing Jobs You Can Legally Do Yourself in Queensland

Not everything needs a plumber. The QBCC publishes a list of unregulated plumbing work that anyone with the right knowledge and skill can do, without a licence, a council approval or a registration (QBCC, Unregulated plumbing guide, retrieved 16 September 2026). It includes:

• Replacing a shower head or a domestic water filter cartridge.
• Replacing a jumper valve or washer in a tap.
• Repairing or replacing a drop valve washer, float valve washer or suction cup rubber in a toilet cistern.
• Replacing caps to ground level inspection openings on a sanitary drain.
• Cleaning or maintaining a ground level grate for a trap on a sanitary drain.
• Installing or maintaining an irrigation or lawn watering system downstream from a tap, isolating valve or backflow prevention device.

One condition applies even here. The QBCC is clear that unregulated work still has to meet the minimum standards set by the legislation and codes. A leaking shower head you fitted yourself is still your problem to fix properly. We’ve written more on where the line sits in our post on what plumbing work you can do yourself in QLD.

Installing Taps, Toilets and Hot Water Systems Needs a Licensed Plumber

This is where the line catches people out. Changing the washer or jumper valve inside an existing tap is unregulated. Altering or replacing the supply pipes behind that tap is not: that’s category 1 of notifiable work. The same split applies in the bathroom, where work on existing sanitary plumbing and existing sanitary drainage are categories 3 and 4.

Hot water sits on the regulated side. Installing, replacing or removing a temperature control device is category 5 of the 12 notifiable work categories, so a hot water system replacement is a job for a licensed plumber, gas or electric. Gas adds a second licence on top. The QBCC’s plumbing and drainage licence classes cover plumbing, drainage and on-site sewage work, and general gas fitting is not among them (QBCC, Plumbing and drainage licences, retrieved 16 September 2026).

Drainage sits in the same bracket. Clearing a blocked drain in Caboolture’s clay soil can turn into altering or replacing sanitary drainage once the camera goes down, and that work is regulated.

How to Check a Plumber’s QBCC Licence Before You Book

The QBCC runs a public Find a local contractor search that lets you look up a licensed contractor in your area (QBCC, retrieved 16 September 2026). Three things worth doing before you hand over a key or a deposit:

• Ask for the licence number and the entity name, then search the register and confirm they match.
• Check the licence class actually covers the work. A plumbing licence and a gas work licence are not the same thing.
• If the work is notifiable work, ask for a copy of the Form 4 registration once it’s finished.

If a quote is well under everyone else’s and the licence number is missing from the ad, the website or the invoice, that’s the moment to ask why.

Creek to Coast Plumbing Licence Details for Caboolture and Moreton Bay

We’re a family owned plumbing business based at Morayfield, trading as Creek to Coast Plumbing since 2012, and owner Damian Kavanagh has held a plumbing licence since the 1990s. We hold QBCC contractor licence 1199436 and gas work licence L40747, and we’re members of the Master Plumbers Association of Queensland. You’re welcome to check the contractor licence on the QBCC register before you book.

We work across Caboolture, Morayfield, Burpengary, Narangba, Beachmere, Bribie Island and the wider Moreton Bay region, on everything from a dripping tap to sanitary drainage and gas fitting. If you want the licence and the class checked before anyone turns up, ask us and we’ll give you the numbers.

Common Questions About Licensed Plumbers in Queensland

Do I need a licensed plumber to change a tap washer in Queensland?

No. Replacing a jumper valve or washer in a tap is on the QBCC’s list of unregulated plumbing work, so you can do it yourself. The work still has to meet the minimum standards in the legislation and codes. If the tap keeps dripping after a new washer, the washer was not the cause, and work on the tap’s supply pipework is regulated.

Is replacing a hot water system notifiable work?

Installing, replacing or removing a temperature control device is category 5 of the 12 notifiable work categories in schedule 1 of the Plumbing and Drainage Regulation 2019. A hot water replacement is work for a QBCC licensed plumber, and where the unit is gas, a separate gas work licence applies as well.

How do I check whether a plumber is QBCC licensed?

Use the QBCC’s Find a local contractor search. Ask the plumber for their licence number and entity name first, then confirm the register shows the same details and a licence class that covers the work you need.

What is a Form 4 and should I ask for a copy?

A Form 4 is how notifiable plumbing work gets registered with the QBCC after it’s finished. The plumber has 10 business days from issuing the invoice to lodge it. Asking for a copy gives you a record that the work was done by a licensed plumber and registered, which is useful when you sell.

Does Creek to Coast Plumbing hold a QBCC licence?

Yes. We hold QBCC contractor licence 1199436 and gas work licence L40747, and we’re members of the Master Plumbers Association of Queensland. The business has traded as Creek to Coast Plumbing since 2012 from Morayfield, serving Caboolture and the Moreton Bay region.

Need a licensed plumber in Caboolture, Morayfield or anywhere across Moreton Bay? Call Creek to Coast Plumbing on 1300 793 962, or send us a message and tell us what you’ve noticed and where. We’ll explain what the work involves and what it will cost before we start.