Builder licence classes in NSW

What it is

In NSW, residential building work and many trades require a licence under the Home Building Act 1989 and the Home Building Regulation 2014. The framework sets who may contract for residential work and who may supervise it. It also defines the category of work each holder may take on. NSW Fair Trading regulates this licensing. Applications and renewals are handled through Service NSW.

You need a contractor licence to do, advertise, or contract for residential building or trade work worth more than $5,000 in labour and materials, including GST. Taking on that work without the right licence is an offence.

Why it matters

The licence you hold defines the legal limit of what you can take on. A holder who works outside their category, or above the value threshold without a licence, risks penalties and unpaid work. Licensing also underpins two further protections. Statutory warranties under the Home Building Act attach to work done under a licence. Home building compensation cover is required once a job passes the insurance threshold. A homeowner who checks a licence before signing is checking that these protections are in place. Anyone can confirm whether a licence is current and what it covers on the NSW public register before signing a contract.

How it works in NSW

The Home Building Act and Regulation set out several authorisations:

• Contractor licence: lets a person or company contract directly with an owner for residential building or trade work. It can be held by an individual or a company. A company licence must have a nominated qualified supervisor for the work it contracts.
• Qualified supervisor certificate: lets a person supervise and carry out the work, but not contract for it in their own name. An individual contractor licence can carry a supervisor endorsement, shown as a "Q", which makes it equivalent to holding a qualified supervisor certificate.
• Tradesperson certificate: lets a person carry out work under supervision in a specific trade, without supervising or contracting.
• Owner-builder permit: lets an owner build or supervise work on their own land, rather than engaging a contractor who holds a licence, where the work needs a permit.

Licences come in categories. General building work covers the construction of a dwelling and most associated work. Specialist categories cover trades such as electrical wiring, plumbing, drainage, gasfitting, plus air-conditioning or refrigeration. Each of those needs its own trade licence or certificate. Some categories are narrower, such as kitchen, bathroom and laundry renovation, or structural landscaping. Swimming pool building is its own category. A contractor licence can be endorsed to cover pool building work.

Thresholds matter at three points:

• A licence is required once the work is worth more than $5,000 in labour and materials, including GST.
• A written contract is required for residential building work over $5,000. For work over $20,000 the contract must include the extra prescribed terms for larger jobs.
• Home building compensation cover (the HBCF, administered through icare) is required for work over $20,000. The contractor must hold it before taking any money or starting work. The deposit is capped at 10% of the contract price under section 8 of the Act.

To obtain a licence, an applicant shows the required qualifications and experience for the category, then applies through Service NSW. Licences are renewed periodically. Holders must continue to meet the eligibility and qualification requirements to renew. Directors of a company that holds a contractor licence must be fit and proper persons. The company must keep a nominated qualified supervisor for the work it contracts.

Common pitfalls

• Working above the threshold without a licence. Any residential job worth more than $5,000 needs the right contractor licence, not just a trade skill.
• Contracting outside your category. A general building licence does not cover specialist trade work such as electrical or plumbing, which need their own licences.
• Skipping home building compensation cover. For work over $20,000 the cover must be in place before any money changes hands. Starting without it is an offence.
• Taking too large a deposit. The deposit cannot exceed 10% of the contract price.
• Assuming an owner-builder permit is a shortcut. It carries its own obligations and limits. It also shifts warranty and insurance responsibilities onto the owner.
• Relying on an unlicensed contractor. Statutory warranties and compensation cover hinge on work done under a licence, so using an unlicensed builder can leave an owner without these protections.

Because statutory warranties only attach where the work is done under a licence, see the related entry on statutory warranties under the Home Building Act 1989 (NSW).