Insurance is one of the first things you sort out when you are setting up a building business – and it stays important as your operation grows. It protects your cash flow, your livelihood and the people you work with. Getting it right means understanding the difference between what is compulsory and what is a sensible commercial decision for your specific trade.
The insurance you must have
Two types of cover are non‑negotiable for most licensed builders in Australia: home building compensation insurance (in the states and territories that require it) and workers compensation.
Home building compensation insurance
This is the one that catches a lot of new builders out. Also called home warranty insurance, it protects your clients if you cannot finish a residential project or fix defects because you have died, disappeared or become insolvent. Under the national guidance on business insurance provided by business.gov.au, it is mandatory for builders taking on residential work valued above a set threshold – the exact amount varies from state to state, so you need to check the rules where you operate. In New South Wales, for example, NSW Fair Trading confirms that you must arrange this cover before you take any money from the client or start work.
Workers compensation
If you employ anyone – even an apprentice or a casual labourer – you are required by law to hold workers compensation insurance in every state and territory. This covers the wages and medical costs of a worker who is injured on the job. Sole traders who work alone are generally not required to cover themselves, but it is worth understanding the rules in your state. In NSW, the scheme is integrated with portable long service leave arrangements under NSW Government business‑insurance guidance, and complying with both is part of your standard legal obligations.
The cover you cannot afford to skip
Some insurance is not written into law but is so essential that no sensible builder operates without it.
Public liability insurance
Public liability covers you if a third party – a neighbour, a passer‑by or a client – is injured or their property is damaged because of your building work. Most principal contractors will not let you on site without it, and many state‑based business‑essentials pages, including the NSW Fair Trading insurance overview, spell out its importance for trades who interact with the public. Even on a small residential renovation, a dropped tool from a scaffold can become a six‑figure claim.
Contract works insurance
This protects your project while it is under construction. Fire, storm, theft and vandalism can wipe out months of work before you have handed over the keys. Contract works insurance covers the materials and labour you have already invested. Where your build involves structural demolition, deep excavations or high‑risk activities, it also gives your client confidence that the job will be finished even if something goes wrong before handover.
Extra cover matched to your trade
Beyond the core policies, the right insurance depends on what type of building you do.
- Residential builders often add construction plant and equipment cover for their own tools and machinery, plus a professional indemnity component if they provide design or project‑management advice.
- Commercial and industrial builders frequently need higher liability limits, as contracts with large developers and government bodies typically set minimum public liability sums of $20 million or more.
- Civil contractors and structural specialists routinely carry cover for underground services, land subsidence and hired‑in plant, because the risks on earthmoving or piling jobs are different from those of a house renovation.
Business.gov.au groups construction alongside industries such as mining, manufacturing and professional services when explaining why insurance should be part of your risk‑management plan. That tells you the risk profile of the building game is taken seriously by government – and your insurance needs to match it.
How to work out what your business needs
Start with your licence conditions and your contract obligations. Then look at the jobs you actually do. A builder who only does bathroom and kitchen renovations in owner‑occupied homes carries a different risk than one who takes on multi‑storey apartment blocks or commercial fit‑outs. An insurance professional who knows the construction sector can help you weigh the cost of a premium against the cost of a worst‑case scenario.
BuilderCover provides general business insurance information only. It is not an insurer, underwriter or insurance broker. It does not promise premiums, cover, claims outcomes or savings – and it does not provide personal financial advice. All information is general in nature. For specific advice about your own business circumstances, you should consult a qualified insurance broker or authorised representative.
If you are starting out or reviewing your cover and want to connect with someone who can help, BuilderCover accepts enquiries and can point you towards appropriately authorised assistance. That way you get advice that reflects your actual contract risks, your trade specialisation and the state or territory where you do your work.