Key takeaways
- A NSW contractor licence covers the class of work it describes, so a business cannot extend it to cover a specialist scope because the work looks sensible on the day.
- Each line of a residential scope should be read against the classes held before the quote is issued, and marked as within the business licence, subcontracted to the right holder or outside the business altogether.
- Waterproofing, tiling, concreting, demolition and pool work are the overlap points where licence questions most often go unasked, so their class boundaries should be checked on the register.
- Subcontracting a class of work does not move the licence question to the subcontractor, because the builder who takes the contract remains responsible for what happens under their name.
- A short licence check recorded on each job, showing the scope, the classes held and the date of the register check, is the evidence that the question was asked before the work started.
A contractor licence in New South Wales covers a class of work, not a business name, a trading style or a list of the things the owner is good at. The class describes the kind of building or specialist work the licence holder may carry out and contract for. When a job goes beyond that class, the licence does not stretch to cover it, however experienced the builder is and however sensible the extra work looks on the day. That gap between the work done and the class held is where most licensing problems on residential jobs begin.
This article maps the licence classes against the common jobs a residential builder meets, and it points to the places where two jobs overlap so that the wrong licence gets used. It is written for a licensed builder who already knows the trade and wants the licensing boundary set out plainly. It is not a substitute for the regulator’s current register, which is the authority on what each class covers and on the conditions that attach to it. The class names and scopes are set out in the Service NSW application pathway and in the Government’s guidance on general building work, and they should be checked there before a licence is applied for or a new class is taken on.
Why the class on the licence matters more than the business name
The licence is attached to a person, and the class sets the boundary of what that person may lawfully contract to do. A business that trades under a name that suggests it does everything is still bound by the classes its licence holder has. A quote that promises work outside those classes is a quote the business should not issue, because it creates an obligation the licence cannot support. Owners often find this out only when a claim is made, and by then the question is not what the work was worth but whether the business was entitled to offer it.
The practical consequence is that the licence should be checked against the job before the quote goes out, not after the work has started. A scope that includes a waterproofed wet area, a retaining wall, a pool surround and a set of new cabinets involves several different licence questions, and the business needs to answer each of them. The check takes a few minutes at the desk. Discovering the gap during the job costs far more.
How the classes line up with a normal residential job
A typical renovation shows the problem well. The main contract is for building work, which sits within the builder’s general residential class. Within that scope, the job will usually include a stage of demolition, the framing and lining, a wet area that needs waterproofing, tiling, perhaps some concreting for a new slab or a footing, and a set of trades that are regulated under their own licences, such as electrical and gas. Each stage has a licence question, and the answers do not all come from the same place.
The table below sets out the common residential jobs and the licence question each one raises. It is a guide to where to look, not a list to be ticked off without checking the register and the scope of the class held.
Common residential jobs and the licence question each raises
| Residential job or scope | Licence question to answer |
|---|---|
| Framing, lining and general fit-out | Within the general residential building class held by the builder, if the scope matches it. |
| Wet area waterproofing | Usually a specialist class, so check the register and have it carried out by a licensed holder of that class. |
| Tiling inside the home | Check the tiling class and whether it extends to the waterproofing beneath the tiles. |
| Electrical and gas connections | Separately licensed trades, engaged as licensed subcontractors and kept off the builder licence. |
| Pool surround, fencing and retaining | Pool, fencing and landscaping boundaries should each be checked on the register before the scope is priced. |
The useful discipline is to take the scope of work in the contract, read each line against the classes held, and mark every line as either within the business’s own licence, subcontracted to a licensed holder of the right class, or outside the business altogether. A scope where every line is one of the first two is a scope the business can lawfully sign. A scope with a line in the third column needs to be re-cut before the contract is issued.
The overlap points where most mistakes happen
Most licensing problems sit at the seams between classes. Waterproofing is the most common. A builder who holds the general residential class may believe that waterproofing a shower recess is simply part of the wet area fit-out, but the work is a specialist class in its own right and it carries the owner’s most serious claim risk. A builder who does the waterproofing without the right class, or who subcontracts it to someone who does not hold it, has taken on a risk the licence does not cover.
Tiling and concreting raise the same question in a different form. A tiler’s work inside a home may be within a specialist class, and a concrete slab or a footing may be a class of its own, depending on the scope. Demolition, excavation and fencing each have their own boundaries. The rule is the same for all of them: the scope of the class should be read from the register or the guidance, and the work should be assigned to a holder of that class where the builder does not hold it.
The overlap that causes the most confusion is the pool. Pool building is a class with its own boundaries, and pool work sits next to landscaping, fencing and paving, each with its own licence questions. A pool surround that includes a retaining wall, a pergola over the pool and a new fence on the boundary may cross several classes before a single paver is laid. The pool classes are also linked to the CPD requirements for pool builders, which are described in the PointCPD guide to how builder CPD works.
Work that combines new building with alteration of an existing house adds one more overlap. The scope may look like a single job, but the existing structure and the new work can be described differently in the contract and in the approvals. The safe approach is to read the contract scope and the approval documents together, check the classes held against each part, and resolve any difference in writing before the quote is accepted. A line that calls the work minor alteration is not a substitute for that check.
Work that sits outside a building licence
A builder’s licence does not authorise electrical or gas work, and a builder who arranges either as part of a renovation must use a licensed holder of the appropriate class to carry it out. This is not a technicality. The electrical and gas trades are licensed separately because the risks are different, and the people who carry out that work have to show their own competence. A builder who briefs the electrician and then supervises the job is still responsible for coordinating the work, but the work itself belongs to the electrician.
Plumbing and drainage sit in a similar position, and so does any work that the regulator has placed under a separate licensing regime. The safe approach is to treat every trade that is licensed separately as a subcontract, to confirm the licence before engagement and to keep a copy on the job file. A subcontractor who is not licensed for the work they are doing creates a problem for the builder, the owner and the insurer, even where the subcontractor is competent.
Subcontracting does not move the licence question
Subcontracting a class of work to someone who holds it is a legitimate way to handle a job outside the builder’s own licence. It does not remove the builder’s obligations, though. The builder who takes the contract remains responsible for the way the job is run, for the quality of the work the owner receives and for ensuring the subcontractor holds the right class for the work they are doing. The licence question is therefore not just about what the builder does, but about what the builder allows to happen under their name.
Retention money adds a financial dimension to the same relationship. Where a head contractor holds retention on a subcontractor’s work, the security of payment rules set out by the NSW Government govern how that money must be handled. A builder who subcontracts specialist work should understand the retention terms in the subcontract, because a dispute over money held back on a job can become a dispute over whether the subcontractor was properly licensed for the work in the first place.
Owners often arrange a trade themselves, such as an electrician or a tiler they have used before, and then ask the builder to fit the rest of the job around that work. The builder should not assume that an arrangement made by the owner carries the same licence protection as one the builder has organised. Where the builder is responsible for coordinating the trades, the licence question still belongs in the scope conversation, and the builder should record who engaged each trade, the licence checked and the date. Saying the owner chose the trade is not a licence check, and it will not help the builder if the work is later challenged.
Rising costs and the contract that carries the licence risk
When costs are moving, the pressure to take on work outside the licence grows. A builder looking at a tight margin may be tempted to bundle a specialist scope into the main contract and absorb the cost, or to hand it to a cheaper labour source without checking the licence. Building Commission NSW has issued guidance for trades on the contract, insurance and compliance questions that rising costs raise, and the principle in that guidance applies to licensing as well: the commercial pressure does not change the licensing obligation.
The contract should say which party is responsible for each licence question, which specialist scopes are subcontracted and to whom, and what evidence of licensing the builder will obtain before work starts. A contract that is silent on these points leaves the builder to answer for them later, and the answer will be made by the regulator or the courts rather than by the builder’s own file.
Working outside the class. Taking on a specialist scope because it sits alongside the main contract, and assuming the general licence covers it, moves the risk to the owner and to the insurer, and then back to the builder when the work is challenged. Read every line of the scope against the classes held before the quote is issued, not when the problem appears on site.
A worked example: a regional builder and a bathroom renovation
A regional builder held a general residential licence and had taken on a bathroom renovation for a long-standing client. The scope included removing the old wet area, lining and framing, tiling and a new shower recess. The builder planned to do the framing and lining, subcontract the tiling to a regular tiler and have the waterproofing done by the tiler as part of the tiling price. The builder assumed that because the tiler held a tiling licence, the waterproofing was covered.
Before the job started, the builder checked the register and the scope of the classes against the quote. The check showed that the waterproofing sat with a different class from the tiling, and that the tiler’s licence did not cover it. The builder engaged a holder of the correct class for the waterproofing, kept the tiling with the tiler, and recorded the split in the subcontracts and the job file. The cost was a modest change to the subcontract structure and a clearer scope in the contract.
The client was never told about the change, because the change was made before the quote was accepted. The lesson the builder took was simple. The licence question is not answered by the trade name on a subcontractor’s card. It is answered by the class and the scope on the licence, read against the job.
Matching the licence to the job
- 1Read the scope line by lineWrite each part of the work as its own line, so that no scope is hidden inside a general description.
- 2Match each line to a classCheck the register and the class scope for every line, and note any line that sits in a specialist class.
- 3Assign or subcontractKeep within the business licence what it covers, and engage a licensed holder of the right class for everything else.
- 4Confirm the subcontractorsCheck each subcontractor licence against the class for the work they will do and keep a copy on the job file.
- 5Write the split into the contractState which party is responsible for each licence question and how retention is handled.
- 6Record the checkFile the scope, the classes held, the subcontractor licences and the date of the register check before work starts.
Keeping the evidence of the licence check
For each job, keep a record of the licence check. That means the scope of work, the classes held by the business and by each subcontractor, the date each licence was checked against the register and the place the check was recorded. The record protects the builder if a licence question is raised later, and it shows that the checks were made in the ordinary course of business rather than after a complaint.
The licence question also connects to the wider picture of supervision and complaints. The PointCPD guide on the contractor licence, supervisor certificate and CPD explains the professional side of holding the licence, and the article on NSW builder supervision duties sets out what a licensed builder is expected to oversee on a job. Read together, they show that a licence is not only a document on the wall but a set of duties that run through every job the business takes on.
For builders who want the wider framework, the PointCPD guide to how NSW builder CPD works sets out how continuing professional development fits into the licence, and the PointCPD course catalogue lists the courses that cover the supervision and site practice topics that sit beside licensing. None of these replaces the register or the regulator’s guidance, which set the scope of each class.
Questions builders ask
Does a general residential builder licence cover waterproofing a shower?
Waterproofing is generally a specialist class in its own right, so the general residential licence does not automatically cover it. Check the register and the scope of the classes for the work. Where the business does not hold the right class, the work should be carried out by a licensed holder of that class.
Can I subcontract work outside my licence class?
Yes, to a licensed holder of the correct class. The builder who takes the contract remains responsible for the way the job is run and for making sure the subcontractor is licensed for the work. Keep a copy of each subcontractor licence on the job file before work starts.
Is electrical work part of a builder licence?
No. Electrical and gas work are licensed separately, and a builder who arranges that work must engage a licensed holder of the appropriate class. The builder can coordinate the work and supervise the overall job, but the electrical or gas work itself belongs to the licensed trade.
Where do I check which work a licence class covers?
The authoritative source is the regulator and the register. The Service NSW pathway for individual contractor licences and the NSW Government guidance on general building work set out the classes and their scope. Check them before applying for a licence or taking on a new class of work.
Does the licence check need to be written down?
It should be. A short record for each job showing the scope, the classes held, the subcontractor licences and the date of the register check is the evidence that the question was asked before work started. It also protects the business if a licence question is raised later.
What happens if I do work outside my licence class by mistake?
The consequences depend on the work and the circumstances, and they can include regulatory action, claims from the owner and difficulty with insurance. If the issue is found, get advice from a licensed building lawyer or the regulator before taking further steps, and stop any further work that falls outside the class until the position is clear.
Sources
- Apply for an individual contractor licence · Service NSW
- Rising fuel costs: what trades need to know about contracts, insurance and compliance · Building Commission NSW · 2026-04-28
- General building work licensing · NSW Government · 2026-09-03
Published 24 October 2026. General information for builders, not legal, financial or engineering advice for a specific job. Check current requirements with the relevant regulator or standard before relying on them.
