When does a building job need home warranty insurance?

In every Australian state and territory except Tasmania, a builder must hold home warranty insurance before accepting any payment or starting residential building work above a set dollar threshold. The policy protects the homeowner, not the builder: it covers the cost of completing or fixing the work if the builder dies, disappears or becomes insolvent during or after the build. The threshold, the scheme name, and the consequences of skipping it differ by state.

Updated 26/09/2026

What is home warranty insurance and who does it protect?

Home warranty insurance is a statutory consumer protection. The builder takes out the policy in the homeowner's name before collecting any money (including the deposit) or starting any work on site. If the builder then dies, disappears, becomes insolvent or (in some states) has their licence suspended before the job is finished or a defect is fixed, the insurance pays to complete the work or rectify the defect.

As NSW Fair Trading states: The home warranty insurance scheme protects homeowners if a builder or tradesperson dies, disappears, becomes insolvent or has their licence suspended.

It is not public liability insurance (which covers injury or property damage to third parties) and it is not professional indemnity. It sits alongside the statutory warranties that run 6 years for major structural defects and 2 years for non-structural defects in most states (NSW Home Building Act 1989, s 18E; broadly similar in VIC, TAS, SA).

What is the threshold in each state and territory?

The dollar value that triggers the insurance obligation varies significantly. The table below summarises each jurisdiction's scheme, threshold and cover scope.

In Queensland, the threshold is just $3,300 (QBCC Act, labour and materials including GST), making it the lowest in the country. In Victoria, DBI is required for domestic building work valued at more than $16,000 (Victorian Building Authority). In NSW, the Home Building Compensation Fund applies to residential work valued at more than $20,000 (NSW Fair Trading). SA raised its Building Indemnity Insurance threshold from $12,000 to $20,000 on 10/11/2025, with a policy limit of $250,000 prescribed in the regulations.

What happens if you build without the required cover?

The consequences are serious and vary by jurisdiction:

• Victoria. A builder without DBI cannot enforce the contract, cannot start work, and cannot receive any money including the deposit. The VBA must suspend the builder's registration if cover lapses.
• Western Australia. A builder who fails to take out home indemnity insurance can be prosecuted and fined up to $50,000, plus risk losing their registration.
• Queensland. In Queensland, a first offence for unlicensed building work carries a penalty of up to 250 penalty units (approximately $33,363). A third or subsequent offence can carry up to one year imprisonment (QBCC Act). These are statutory maxima only.
• NSW. Penalties for unlicensed contracting are penalty-unit based and materially higher than minor building-permit offences. The exact current maximum should be confirmed against NSW Fair Trading (Home Building Act 1989, s 4).

These are statutory maxima. Courts and tribunals (NCAT, VCAT, QCAT) also order rectification, compensation and refunds to homeowners independently of fines. This is advisory context, not legal advice: confirm your position with your state's licensing authority or a construction lawyer.

How does deposit and contract compliance tie in?

Home warranty insurance does not sit alone. Most states also set deposit caps and written-contract thresholds that interact with the insurance obligation:

• NSW. Maximum deposit of 10% of the contract price. A written contract is required for work over $5,000, and a full home building contract for work over $20,000.
• Victoria. Maximum deposit 10% for contracts under $20,000, dropping to 5% for contracts of $20,000 or more.
• Queensland. Maximum deposit 10% for contracts under $20,000 and 5% for contracts of $20,000 or more. A QBCC licence is required for work over $3,300.
• South Australia. Maximum deposit 5% where work is over $20,000.

Taking an excessive deposit, demanding payment ahead of stage completion, or failing to use a compliant written contract are offences under each state's domestic building legislation. Variations to the contract must be in writing and signed by both parties before the varied work begins.

The thresholds and deposit caps above are drawn from each state's published licensing authority and domestic building legislation. We will not invent numbers for your business, and we do not promise a capture or conversion rate. Treat the figures above as a directional industry estimate, not a promise.

What do the statutory warranties actually cover?

On top of the insurance, the building legislation in each state imposes statutory warranties on the work itself. Using NSW as the worked example (Home Building Act 1989, s 18E):

• Major structural defects: 6 years from completion. This covers foundation and slab cracking, settlement, structural wall cracking, roof-structure failure, load-bearing wall defects and retaining-wall failure.
• All other defects: 2 years from completion. This covers paint, tiling, joinery, plumbing and electrical fit-off, doors, windows, flooring and cosmetic cracking.

If a breach becomes apparent in the last six months of the warranty period, proceedings may start within a further six months. Most other states run a broadly similar six-year structural and shorter non-structural model.

Builders also carry a contractual defects-liability period (often 3 to 12 months post-handover) on top of the statutory warranty. The two run concurrently from different start points.

How can a builder stay on the right side of the rules?

The compliance checklist is short and the consequences of skipping a step are disproportionate:

1. Confirm your licence class covers the scope. Operating outside your licence class or doing building work above the state threshold without a licence is an offence under both the state building Act and the Australian Consumer Law (misleading or deceptive conduct, ACL s 18; false representations, s 29).
2. Take out the home warranty insurance in the homeowner's name before taking any money or starting work. Not after the deposit, not after the slab is poured. Before.
3. Issue a compliant written contract. In NSW that means the small-jobs form for $5,000 to $20,000 and a full home building contract above $20,000. Other states have their own prescribed forms and thresholds.
4. Cap the deposit. Check your state's cap (5% or 10%, depending on the contract value and the state) and never exceed it.
5. Document every variation. Written, signed by both parties, before the work proceeds. Verbal variations are the single biggest source of disputes and unrecovered margin in residential building (see our guide to quoting a building job).
6. Track the warranty period. Log the practical-completion date and the defect-liability and statutory-warranty windows for every job, so warranty claims are managed within the timeframe.

If you are unsure about your licence class, insurance obligation or contract requirements, check with your state's licensing authority or a construction lawyer. We can help you systematise the admin that sits around this, but the compliance position itself is between you, your insurer and your regulator.

To talk through how we help builders automate compliance tracking, quoting and job management, book a free 15-minute discovery call.