QBCC Licence Check — How to Verify a Plumbing Licence in QLD
Quick Answer
To verify a plumbing licence in Queensland, use the free QBCC Online Licence Search tool. You must ensure any subcontractor or employee holds the correct occupational or contractor licence class for the specific regulated work they are performing under the Plumbing and Drainage Act 2018. Failing to verify can result in fines exceeding $38,000 for the contracting business, voided insurance claims, and disciplinary action against your own contractor's licence.
The Critical Importance of Licence Verification in QLD
As a plumbing contractor or business owner in Queensland, you are legally responsible for ensuring that every tradesperson on your site is appropriately licensed for the work they perform. In 2026, the Queensland Building and Construction Commission (QBCC) continues to heavily audit sites and crack down on unlicensed and out-of-scope plumbing work. Relying on a subcontractor's word, a handshake, or an outdated photocopy of a licence card is a significant compliance risk that can jeopardise your entire business.
When you engage a subcontractor or hire a new employee, their compliance becomes your liability. If they perform defective work, fail to meet the standards set out in the AS/NZS 3500 series, or cause property damage while unlicensed, your public liability insurance will likely refuse the claim. Furthermore, the QBCC will hold the principal contractor accountable for the breach.
The Legal Framework: PDA 2018 and QBCC Act 1991
The regulatory landscape for plumbing in Queensland is governed primarily by the Plumbing and Drainage Act 2018 (PDA) and the Queensland Building and Construction Commission Act 1991 (QBCC Act).
- Plumbing and Drainage Act 2018: Section 56 of the PDA explicitly states that a person must not carry out plumbing or drainage work unless they hold the relevant licence. This applies to all regulated work, including sanitary plumbing, water plumbing, and drainage.
- QBCC Act 1991: Section 42 of the QBCC Act prohibits carrying out building work (which includes plumbing and drainage) without a contractor's licence. If you are sub-contracting work, the entity you contract with must hold a QBCC Contractor Licence.
Penalties for contracting unlicensed workers are severe. For a first offence, maximum fines for corporations can exceed $38,000 (equivalent to 250 penalty units), and individuals can face fines over $7,500. Repeat offences can lead to imprisonment or the cancellation of your own QBCC licence.
How to Perform a Comprehensive QBCC Licence Check
Verifying a licence takes only a few minutes but provides essential legal protection. Here is the step-by-step process for checking a QLD plumbing licence:
- Access the Register: Go to the official QBCC website and navigate to the Online Licence Search tool.
- Search by Details: Enter the individual's full name, business name, or ideally, their QBCC licence number.
- Verify the Licence Class: Ensure the class matches the work they will perform (e.g., Plumbing and Drainage, Drainage only, Roof Plumbing).
- Check the Licence Status: The status must be listed as 'Active'. Suspended or cancelled licences offer no legal coverage.
- Review Conditions or Restrictions: Look for any specific conditions attached to the licence. Some plumbers may have restrictions limiting them to specific types of work or requiring supervision.
- Check Endorsements: If the work involves specialised systems, verify they hold the correct endorsements, such as Backflow Prevention, Thermostatic Mixing Valves (TMV), or Solar and Heat Pump installations.
- Review the Disciplinary Register: Check for any recent disciplinary actions, direction to rectify notices, or demerit points.
Types of Plumbing Licences and Endorsements in QLD
Understanding the distinction between licence types is crucial for site compliance. The QBCC issues several classes of licences, each with specific limitations:
| Licence Type | Who It's For | What It Allows |
|---|---|---|
| Contractor Licence | Businesses, sole traders, partnerships | Allows contracting directly with the public and signing off on Form 4s. Requires a nominated supervisor. |
| Occupational Licence | Employees, subcontractors on the tools | Allows performing plumbing work under a contractor. Cannot contract directly with the public. |
| Provisional Licence | Apprentices, overseas-trained plumbers | Allows performing work only under the direct or broad supervision of a fully licensed plumber. |
Additionally, specific work requires specific endorsements on the occupational licence. For example, installing and commissioning a TMV requires a TMV endorsement, and testing backflow devices requires a Backflow Prevention endorsement.
Compliance Pitfalls & Common Mistakes
Even experienced plumbing contractors can fall into compliance traps when managing subcontractors and staff. Here are the most common pitfalls:
- Assuming a Contractor Licence Covers the Worker: A business may hold a valid QBCC Contractor Licence, but the individual tradesperson on the tools must hold a current Occupational Licence. You must verify both the business entity and the individual worker.
- Ignoring Gas Fitting Requirements: Plumbing and gas fitting are entirely separate regulatory domains in Queensland. A plumber cannot perform gas work under AS/NZS 5601.1 without a specific Gas Work Licence issued by Resources Safety and Health Queensland (RSHQ). The QBCC search will not show gas licences.
- Failing to Track Expiry Dates: Licences expire annually or every three years. A licence check done during onboarding in 2025 is not valid for a project starting in late 2026. Continuous monitoring is required.
- Form 4 (Notifiable Work) Violations: Allowing an occupational plumber to submit a Form 4 under your contractor licence without proper internal review. The contractor is ultimately responsible for the compliance of the notifiable work.
Practical On-Site Examples and AS/NZS Compliance
Failing to verify licences often leads to direct breaches of the AS/NZS 3500 series. Here is how unlicensed or incorrectly licensed work plays out on site:
Example 1: Cross-Connection Control (AS/NZS 3500.1)
You hire a subcontractor to install a reduced pressure zone (RPZ) device on a commercial site. Under AS/NZS 3500.1:2021 (Section 4), backflow prevention devices must be installed, commissioned, and tested by a licensed plumber who also holds a specific Backflow Prevention endorsement. If you fail to verify this endorsement on the QBCC register and the installation fails, resulting in a cross-connection and water contamination, your business is liable for the non-compliant work, the environmental health breach, and the costs of rectification.
Example 2: Sanitary Plumbing and Supervision (AS/NZS 3500.2)
An apprentice or provisional licence holder is tasked with installing a stack system in a multi-storey residential build. Under the PDA, provisional licence holders must be supervised by a fully licensed plumber. If the supervisor leaves the site and the apprentice incorrectly grades the pipework or fails to install required expansion joints (violating AS/NZS 3500.2 requirements), the principal contractor is liable for both the defective sanitary drainage work and the breach of supervision requirements.
Example 3: Heated Water Services (AS/NZS 3500.4)
A subcontractor is brought in to install a commercial solar water heating system. While they hold a standard plumbing licence, they lack the specific Solar and Heat Pump endorsement. Under AS/NZS 3500.4, the installation of heated water systems must meet strict temperature control and energy efficiency guidelines. Without the correct endorsement, the work is legally unauthorised, and the QBCC can issue a direction to rectify, forcing you to tear out and replace the system at your own expense.
Frequently Asked Questions (FAQ)
How often should I check my subcontractors' licences?
Best practice is to verify licences during the initial onboarding process and set up automated reminders to re-check at least 30 days before the licence expiry date. For long-term projects, a quarterly audit of all site personnel is recommended.
Does a QBCC plumbing licence cover gas fitting work?
No. While the QBCC issues plumbing and drainage licences, Gas Work Licences are regulated and issued separately by Resources Safety and Health Queensland (RSHQ). You must check the RSHQ register to verify a gas fitter's credentials for any work falling under AS/NZS 5601.1.
What happens if I accidentally hire an unlicensed plumber?
Ignorance is not a defence under the QBCC Act. Your business can face substantial fines (up to $38,000 for corporations), be forced to rectify the defective work at your own cost, and your public liability insurance will likely be voided in the event of a defect or injury.
Can an occupational plumber sign off on a Form 4?
No. Only a licensed plumbing contractor, or a nominated supervisor acting on behalf of a contracting business, can legally sign off on a Form 4 (Notifiable Work) in Queensland. An occupational plumber cannot lodge this form independently.
Managing subcontractor compliance, tracking licence expiry dates, and ensuring every worker has the correct endorsements manually is a massive drain on your administrative resources. TradeDesk can help automate compliance by securely storing subcontractor details, verifying licence statuses, and sending automated alerts before qualifications expire, keeping your business protected and site-ready.