New South Wales Contractor License Requirements: the $5,000 Line

Short answer: In New South Wales, Building Commission NSW licenses residential building work, and you need a contractor license once a job is worth more than $5,000 in labor and materials including GST. That threshold covers advertising and contracting for the work, not just doing it. Specialist work — electrical, plumbing, draining and gasfitting, air conditioning and refrigeration, medical gas and mechanical services — needs a license at any value, residential, commercial or industrial.

Start with the right regulator, because this is where a lot of published advice is out of date. Licensing sits with Building Commission NSW, with applications handled through Service NSW; NSW Fair Trading still exists, but on the general consumer protection side rather than as the building licensing body. The NSW Government building and trade licensing pages are the source for every figure below. Tax is separate — GST is federal, administered by the ATO, and does not vary between Australian states, which is worth saying plainly to anyone arriving from a US sales-tax mindset.

What work needs a license in New South Wales?

The threshold is $5,000, calculated on labor and materials together, including GST. Below it, general residential building work and most trade work needs no contractor license. Above it, it does. Read the verb list carefully while you are here: the Building Commission’s wording is that you must hold a licence to carry out, advertise or contract for the work. Putting a $30,000 bathroom on your website is regulated conduct in NSW even if you never win the job.

The categories break down like this:

Category	What it covers	Threshold
Residential building work	General building work on dwellings; a general builder can do any of it	Over $5,000 incl. GST
Other building work	Erection of prefabricated metal-framed home additions and structures, kitchen, bathroom and laundry renovation, structural landscaping, swimming pool building	Over $5,000 incl. GST
Trade work	Separate categories for each trade — bricklaying, carpentry, decorating, dry plastering, excavating, fencing, general concreting, glazing, joinery, metal fabrication, minor maintenance and cleaning, minor trade work, painting, roof plumbing, roof slating, roof tiling, stonemasonry, swimming pool repairs and servicing, underpinning and piering, wall and floor tiling, waterproofing, wet plastering	Over $5,000 incl. GST
Specialist work	See below	Any value

Note how finely the trade list is cut. Roofing is not one licence but three — roof plumbing, roof slating and roof tiling — and plastering splits into wet and dry. Holding the wrong one of a pair is unlicensed work, not a technicality.

Which work is licensed no matter what it costs?

Specialist work. NSW carves five categories out of the threshold entirely: you need a licence or certificate to carry out, advertise or contract for them regardless of the cost of the work and regardless of whether the job is residential, commercial or industrial.

• Air conditioning and refrigeration
• Electrical
• Disconnection and reconnection of fixed electrical equipment
• Medical gas and mechanical services
• Plumbing, draining and gasfitting

There is no small-job version of these. A $200 powerpoint installation and a $200,000 hydraulic services package sit under the identical requirement. Specialist work also drags in any associated electrical wiring that would otherwise be done by an electrician, which is how a mechanical services job quietly becomes an electrical one. And the third item catches people who do not consider themselves electricians at all — disconnecting a fixed appliance and reconnecting it is licensed work in NSW.

Contractor license or qualified supervisor certificate?

These are different credentials and they are not interchangeable. A contractor license lets you contract for work and advertise for it. A qualified supervisor certificate lets you carry out the work and supervise tradespeople, but does not let you contract or advertise.

If you are a sole trader taking your own jobs, the contractor license is the one you need — the certificate alone leaves you unable to legally quote a customer. Contractor licenses are available to individuals and to companies and partnerships, for a term of 1, 3 or 5 years chosen at application. Whether to trade as an individual or through a company is a separate decision with its own liability and cost consequences; do I need an LLC to freelance covers that structural question before you lock a name onto the license.

What do you have to prove to get a general building license?

Two things: experience and a formal qualification.

Experience. At least two years of relevant industry experience across a wide range of building construction work, most of it gained within the 10 years before you apply, supervised by someone holding an individual contractor license or qualified supervisor certificate in general building work — so unsupervised years working for yourself generally will not count.

Qualification. One of three paths:

1. The CPC40120 Certificate IV in Building and Construction plus the specified mandatory units — covering building codes, work health and safety, contracts, estimating, materials, planning, supervision, legal requirements, structural principles and dispute resolution.
2. A qualifying Australian university degree in building, construction, construction management, construction economics, applied science (building) or quantity surveying, requiring four years of full-time study with a mandatory work placement.
3. A relevant degree combined with the Certificate IV and specified units.

You also need a National Police Check certificate no older than four months when you submit, proof of identity with address, a recent passport photo, original copies of qualifications, and the application fee.

When do you have to arrange home building compensation cover?

At $20,000, including GST — a different threshold from the licensing one, which is where sequencing errors happen. A licensed builder or tradesperson must have home building compensation (HBC) cover for each home building project over $20,000 including GST.

The timing rule matters more than the number. Cover has to be in place before you take any money at all, including the deposit, and before work starts. Taking a deposit on a $25,000 job before the certificate exists is a compliance failure even if you arrange cover the following week. The scheme is regulated by the State Insurance Regulatory Authority (SIRA), and the certificate is what the homeowner is told to ask for before paying anything. Cover is capped and runs for set warranty periods differing between major and non-major defects; confirm current limits with SIRA, and see New South Wales contractor insurance requirements for how it fits your other policies.

Homeowners doing their own work have a parallel obligation. An owner-builder permit is required to supervise or do work valued at over $10,000 on your own home when you are not contracting a licensed builder, and if the work is valued at more than $20,000 you must also complete the specified units of competency or hold an approved equivalent qualification. The permit is only available where the work requires development consent under Part 4 of the Environmental Planning and Assessment Act 1979 or is complying development under that Act — if it needs neither, no permit will be issued.

Applicants need a white card (the general construction induction card) and proof of ownership or a registered lease of at least three years. One consequence is easy to miss: every owner of the land goes on the application, and those other owners are then locked out of an owner-builder permit on different land for five years.

What are the penalties for unlicensed building work in NSW?

Unlicensed contracting is an offence under the Home Building Act 1989, and the maximum penalty is set in penalty units — substantially higher for a company than for an individual, and indexed rather than fixed, so any dollar figure you read in an article ages badly. Take the current amount from Building Commission NSW or from the Act itself rather than from a secondary source. The offence attaches to contracting without the licence, not to any harm caused: nobody has to be hurt and no defect has to appear.

The commercial damage usually runs deeper than the fine anyway. Unlicensed work sits outside the home building compensation scheme, so the customer has no last-resort cover and you have no way to obtain it retrospectively. Enforcement action also becomes part of the licensing record every prospective client is told to search before hiring.

Thresholds and regulators are state-specific in Australia and move sharply across borders — Queensland contractor license requirements sit under a different body with a far lower threshold, so a NSW license does not travel.

How does a homeowner check your license?

Through verify.licence.nsw.gov.au, which NSW describes as the place to look up and verify NSW licence and registration information. Building Commission NSW points homeowners at an online tool to check that a contractor or tradesperson is qualified and licensed for the job before work begins, and the record returns more than a yes or no — the categories the licence actually covers are on it.

Assume every serious client runs it. Keep the licence current, because an expired date reads to a homeowner exactly like no licence at all, and make sure the categories on it cover the work you are quoting. A general building licence does not authorize specialist work, and a roof tiling licence does not authorize roof plumbing.

What has to be documented once you are licensed?

The license is a permission. The evidence is what you produce afterwards — quotes and invoices matching the categories you are licensed for, HBC certificates issued before deposits were taken, and material costs you can substantiate if the ATO asks or a dispute escalates.

Keel is an iOS app that keeps that documentation entirely on the phone: no account, no bank connection, no cloud sync, and an App Store privacy label reading Data Not Collected. It creates invoice PDFs with your own numbering, logo, and a payment-link QR code — so your license number appears on every document that leaves your hands. It captures receipts read on-device with Apple Intelligence, logs mileage between jobs, and writes everything to an append-only, hash-chained ledger exportable as one file per year or as an Accountant Pack. The free tier is $0 with unlimited invoices, receipts and mileage; Keel Pro is a one-time $249.99 Lifetime purchase.

Keel does not apply for your license, arrange HBC cover, or lodge anything with the ATO — it is a record keeper, not a compliance tool. If getting paid on time is the bigger problem, how to get clients to pay deals with that directly.

Frequently asked questions

Do I need a license for jobs under $5,000 in NSW?

Not for general residential building work or ordinary trade work — the contractor license requirement starts above $5,000 in labor and materials including GST. But the exemption does not touch specialist work. Electrical, plumbing, draining and gasfitting, air conditioning and refrigeration, and medical gas and mechanical services need a license at any value.

Who issues building licenses in New South Wales?

Building Commission NSW, with applications processed through Service NSW. Older guides still point to NSW Fair Trading; Fair Trading remains in place for general consumer matters, but licensing and home building complaints go to Building Commission NSW. Licenses run for terms of 1, 3 or 5 years.

How much experience do I need for a NSW general building license?

At least two years of relevant industry experience across a broad range of building construction work, most of it gained in the 10 years before you apply, supervised by a holder of an individual contractor license or qualified supervisor certificate in general building work. You also need a Certificate IV in Building and Construction with the specified units, or a qualifying degree.

What is the difference between a contractor license and a qualified supervisor certificate?

A contractor license lets you contract for and advertise work. A qualified supervisor certificate lets you carry out and supervise the work but not contract or advertise for it. A sole trader quoting their own jobs needs the contractor license; the certificate alone is not enough.

When do I need home building compensation cover?

For every home building project over $20,000 including GST, and it must be in place before you take any money — including the deposit — and before work starts. That is a different threshold from the $5,000 licensing line, so a job can require a license without requiring cover.

What is the fine for unlicensed building work in NSW?

Unlicensed contracting is an offence under the Home Building Act 1989, with the maximum penalty expressed in penalty units and set much higher for a company than for an individual. Because penalty units are indexed, take the current dollar amount from Building Commission NSW rather than from any article. The bigger exposure is that unlicensed work falls outside the home building compensation scheme entirely, and cannot be brought back inside it after the fact.

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This article is general information, not legal or tax advice. Rules change — confirm with the authority named above.