Building contracts and licensing under the Home Building Act NSW

Residential building work in NSW is governed by the Home Building Act, which sets rules for contracts, licensing, insurance, and the warranties that protect homeowners. The rules matter to builders and tradespeople, because getting them wrong can affect your right to be paid. They matter to homeowners, because they are your protection. This guide explains the key requirements.

What the Home Building Act covers

The Home Building Act 1989 regulates residential building work and specialist work, such as electrical, plumbing, and air conditioning, in NSW. It sets out who can do the work, what the contract must look like, what insurance is required, and the warranties the law implies into every job. NSW Fair Trading administers the licensing and much of the consumer protection side.

The theme that runs through the Act is consumer protection. It exists because building work is high-value, hard for a homeowner to assess, and a common source of disputes. For a contractor, that means compliance is not optional, and non-compliance can cost you the right to enforce your contract.

When you need a written contract

The Act sets thresholds for contracts based on the value of the work.

For residential building work over $5,000 including GST, a written contract is required. For work between $5,000 and $20,000, a small jobs contract with the basic required information is enough. For work over $20,000, a large jobs contract with more extensive requirements applies. If the price is not fixed, the threshold is based on the reasonable market cost of the labour and materials.

For a contractor, the practical point is blunt. Doing work over the threshold without a compliant written contract can expose you to penalties and can affect your ability to recover payment. The contract is not red tape, it is part of your right to get paid. For a homeowner, insist on a proper written contract before work starts, and do not pay a deposit until it is in place.

Licensing

A contractor who does residential building work, or who contracts to do it, generally needs to be licensed, and specialist work such as electrical and plumbing requires the relevant licence. A company must be licensed in its own name, not through an individual's licence, and the contract must show the licence holder's name and number.

Licensing is where we see real consequences. An unlicensed person who was required to be licensed can face penalties and, importantly, can have their right to recover payment affected. If you are a contractor, make sure the licensing is right before you take on the work. If you are a homeowner, check the licence on the NSW Government licence check before you engage anyone.

Home building compensation (insurance)

For residential building work over $20,000, the contractor must have home building compensation cover, often still called home warranty insurance, and must give the homeowner a certificate before taking any payment, including a deposit. This insurance protects the homeowner if the contractor dies, disappears, becomes insolvent, or fails to comply in certain circumstances.

For a contractor, taking a deposit before providing the certificate is a breach. For a homeowner, do not pay anything until you have the certificate for work over the threshold. It is one of the clearest warning signs when a builder cannot produce it.

The statutory warranties

The Act implies statutory warranties into every contract for residential building work, whether or not they are written into the contract. In broad terms, these include that the work will be done with due care and skill and in accordance with the plans, that materials will be good and suitable, that the work will comply with the law, and that the work will be done with due diligence and result in a dwelling that is reasonably fit to live in.

These warranties run for set periods from completion. The period is 6 years for a major defect and 2 years for any other defect. These periods are important for both sides. For a homeowner, they are the window in which you can pursue a defect. For a contractor, they define how long you remain exposed. Because the periods are strict, a homeowner who notices a defect should get advice well before the relevant period runs out.

How we help

We advise builders and tradespeople on getting their contracts, licensing, and insurance right, so compliance protects your right to be paid rather than undermining it. We advise homeowners on their rights under a building contract and the statutory warranties, and on what to check before they engage a contractor or pay a deposit. For either side, the Home Building Act is where many building disputes are won or lost, so it pays to get it right from the start.

Frequently asked questions

When do I need a written building contract in NSW? For residential building work over $5,000 including GST. Work over $20,000 requires a more extensive large jobs contract.

Does my builder need a licence? Generally yes for residential building work, and specialist work needs the relevant licence. An unlicensed contractor can have their right to be paid affected. Check the licence before engaging anyone.

What is home building compensation insurance? Cover the contractor must hold for work over $20,000, with a certificate given before any payment. It protects the homeowner if the contractor dies, disappears, becomes insolvent, or fails to comply.

How long do the statutory warranties last? 6 years for a major defect and 2 years for any other defect, from completion of the work.

Keep reading

• Tradespeople
• Building contract disputes: how to resolve them
• Security of Payment Act NSW: how tradies get paid

This article contains general information only and is not legal advice. For advice about your situation, please contact us. Liability limited by a scheme approved under Professional Standards Legislation.