What is Notifiable Work in QLD Plumbing?
Quick Answer
In Queensland, notifiable work is a category of plumbing and drainage work that allows a licensed plumber or drainer to perform the work without a local government permit or mandatory inspection — but it must be registered with the QBCC via Form 4 or Form 4A within 10 business days of issuing an invoice. A copy must also be provided to the owner or occupier within 20 business days of registering.
For licensed plumbers and drainers operating in Queensland, understanding the boundaries of notifiable work is critical for maintaining compliance and avoiding costly penalties. The notifiable work framework allows you to perform specific plumbing and drainage tasks without waiting for local government approvals or inspections. However, this flexibility comes with strict reporting obligations to the Queensland Building and Construction Commission (QBCC) under section 83 of the Plumbing and Drainage Act 2018. As we navigate the regulatory landscape in 2026, the QBCC continues to conduct routine audits to verify compliance with relevant codes and standards.
What Classifies as Notifiable Work?
Notifiable work is defined in Schedule 1 of the Plumbing and Drainage Regulation 2019, which lists 12 specific categories. It generally covers work performed in existing buildings — as opposed to new construction, which is permit work. The most commonly encountered categories include:
- Category 1: Extending, altering, replacing or removing supply pipes (water supply) for an existing building or Class 1 extension.
- Category 3: Extending, altering, replacing or removing sanitary plumbing for an existing building.
- Category 4: Extending, altering, replacing or removing sanitary drainage (other than a combined sanitary drain) for an existing Class 1 or 10 building.
- Category 5: Installing, replacing or removing a temperature control device for an existing building.
- Category 6: Installing, replacing or removing a water heater (electric, gas, solar, heat pump) for an existing building.
- Category 7: Installing, replacing or removing a testable backflow prevention device or dual check valve with atmospheric port.
- Category 9: Installing or relocating a fixture (toilet, basin, shower, sink) in an existing Class 1 or 10 building.
Plumbing and drainage work associated with new construction is permit work, not notifiable work. If the work involves a new connection to a service provider's infrastructure, or is for a new building, it falls outside the notifiable work framework entirely.
The Legislative Framework and Technical Standards
When performing notifiable work, you are bound by both state legislation and national standards. The primary legislative instruments are the Plumbing and Drainage Act 2018 (PDA), which requires registration under section 83; the Plumbing and Drainage Regulation 2019, which defines the 12 categories of notifiable work in Schedule 1; and the Queensland Building and Construction Commission Act 1991 (QBCC Act), which governs contractor licensing and disciplinary action.
All physical work must also comply with the Plumbing Code of Australia (PCA) and the AS/NZS 3500 series. When altering sanitary plumbing, minimum pipe grades and venting requirements must comply with AS/NZS 3500.2 (Sanitary plumbing and drainage). When installing or replacing a water heater, temperature control devices must adhere to AS/NZS 3500.4 (Heated water services), including the requirement that heated water delivered to sanitary fixtures does not exceed 50°C. For gas-fired water heaters, AS/NZS 5601.1 (Gas installations) also applies.
The Form 4 Lodgement Process
The administrative obligation for notifiable work centres around the Form 4 (Notifiable Work) or Form 4A (Notifiable Work — Public Sector Entity). The process is straightforward but strictly time-bound:
- Complete the Work: Ensure the installation complies with all relevant AS/NZS standards and the PCA.
- Lodge the Form: Register the work via the myQBCC portal within 10 business days of issuing an invoice. If no invoice is issued, register when the work becomes operational.
- Pay the Fee: Online registration costs $36.88; manual registration costs $49.80. Fees are indexed on 1 July each year.
- Provide a Copy: Provide a copy of the completed Form 4 to the owner or occupier within 20 business days of registering the work.
When lodging, you must select all applicable categories of work performed. Where multiple categories are performed under the same single transaction at the same property, only one Form 4 is required.
Compliance Pitfalls and Common Mistakes
| Common Mistake | The Consequence | How to Avoid It |
|---|---|---|
| Late Lodgement | Failing to lodge within 10 business days of invoicing is an offence under the PDA. A maximum penalty of 60 penalty units applies per offence. | Lodge the Form 4 the same day you issue the invoice, or set a calendar reminder immediately after invoicing. |
| Failing to Provide a Copy to the Owner | A separate offence under the PDA, also carrying a maximum penalty of 60 penalty units. Owners frequently complain to the QBCC when they don't receive their compliance paperwork. | Attach the Form 4 PDF to the final invoice or email it to the client immediately after registration. |
| Selecting Incorrect Work Categories | Failing to select all applicable categories creates an inaccurate record and may trigger audit findings, as QBCC and local governments rely on category data for compliance checks. | Review all 12 categories in Schedule 1 before lodging. A bathroom renovation may involve Categories 1, 3, 4, 5, and 9 simultaneously. |
| Misclassifying Permit Work as Notifiable Work | Performing compliance assessable work (e.g., plumbing for a new building or a new sewer connection) under a Form 4 is illegal and can lead to severe disciplinary action and rectification orders. | If the work is for a new building or involves new infrastructure connections, contact the local government for a permit before starting. |
Practical On-Site Examples
Scenario 1: The Bathroom Renovation
You are contracted to renovate an existing bathroom in a Class 1 residential dwelling. You relocate the toilet (Category 9), extend the water supply pipework to a new vanity position (Category 1), alter the 50mm sanitary drain graded at 1:40 in accordance with AS/NZS 3500.2 (Categories 3 and 4), and install a new temperature control device on the existing hot water system to comply with AS/NZS 3500.4 (Category 5). Because all of this is an alteration to an existing system in an existing building, it is notifiable work. You lodge a single Form 4 selecting Categories 1, 3, 4, 5, and 9 within 10 business days of invoicing.
Scenario 2: The New Granny Flat
A client has obtained a building approval for a new detached granny flat. You are engaged to install all plumbing and connect the new sanitary drain to the existing house drain. Because this is a new building, the work is permit work. You must obtain a permit from the local government, pay the relevant inspection fees, and have the work inspected by a local government plumbing inspector before covering the trenches. Lodging a Form 4 in lieu of a permit is an offence.
Frequently Asked Questions
Who is the "relevant person" responsible for lodging the Form 4?
Under the Plumbing and Drainage Act 2018, the relevant person is the licensed contractor who supervises or directs the work. If multiple licensees are involved, one licensee registers the Form 4 on behalf of all others, listing all licence numbers in the form. You can also appoint a nominated representative — such as an office administrator — to lodge on your behalf through the QBCC Portal, though the licensee remains legally responsible.
Do I need a Form 4 for minor maintenance work?
No. Minor work — such as replacing tap washers, clearing a blocked drain without altering pipework, or replacing a showerhead — is classified as minor work under the Plumbing and Drainage Regulation 2019 and does not require a Form 4 or local government approval. However, replacing a fixture such as a toilet suite does constitute notifiable work under Category 9.
What happens if I discover non-compliant work done by a previous plumber?
You are only responsible for the work you perform. It is best practice to notify the owner in writing of any pre-existing defects — for example, an unvented branch drain violating AS/NZS 3500.2 or a water heater without a compliant temperature control device. If you alter or connect to the defective system, your specific addition must comply with current standards.
Can I lodge one Form 4 for multiple jobs at different properties?
No. A separate Form 4 must be lodged for each distinct property. However, if you perform multiple categories of notifiable work at the same property under the same single transaction, you can include them all on a single form, provided it is lodged within 10 business days of issuing the invoice.
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