Builder Insurance FAQ: 15 Questions Registered Builders Ask Most

You’ve just signed the contract for a $1.8 million duplex in Sydney’s inner west. The client is eager, the council approvals are in, and your crew is mobilised for a Monday start. But Thursday afternoon, your insurance broker calls: your public liability policy has a $20 million sublimit on structural defects, and the underwriter is pulling coverage for any project over $1.5 million. Do you have a gap? Can you still start on Monday?

This isn’t a hypothetical. In 2025, NSW Fair Trading recorded a 34% increase in insurance-related licence suspensions compared to 2023. The Queensland Building and Construction Commission (QBCC) now mandates minimum policy wordings that caught 1 in 5 builders off-guard during renewal audits. And the Victorian Building Authority (VBA) has flagged that 12% of domestic builder licence applications were delayed in 2024 due to non-compliant insurance documentation.

As a construction risk management consultant with 15 years in this sector, I’ve seen builders lose their licence, their bond, and their business over a single misunderstood policy clause. Below are the 15 questions I get asked most often by registered builders—and the answers you need before your next project starts.

1. What types of insurance must I legally hold as a registered builder in Australia?

The short answer: it depends on your state and the type of work you do. But across all jurisdictions, there are two non-negotiable layers:

• Public Liability Insurance – required by every state building authority for licence holders. Minimum cover is typically $10 million or $20 million per occurrence, but some contracts (especially commercial projects) demand $20 million or more. In 2026, the average premium for a $20 million public liability policy for a small to medium builder (turnover $2–5 million) ranges from $3,500 to $8,500 annually, depending on claims history and trade type.

• Home Building Compensation (HBC) Insurance – also known as “builder’s warranty insurance” or “domestic building insurance.” This is mandatory in every state and territory for residential projects valued above a statutory threshold. In New South Wales, the threshold is $20,000 (including labour and materials). In Queensland, it’s $3,300. In Victoria, it’s $16,000. The policy protects homeowners if you die, disappear, become insolvent, or fail to complete the work. Premiums are typically 1.5% to 3.5% of the contract value, depending on your claims history and the insurer.

Additionally, if you employ staff or subcontractors, you must hold Workers’ Compensation Insurance (state-based schemes). And if you operate through a company or trust, Professional Indemnity Insurance is strongly recommended—and required by some regulators for specific licence classes (e.g., design-and-construct builders in Queensland).

2. What is the difference between public liability and professional indemnity insurance?

This is the most common confusion I see on site.

Public Liability Insurance covers third-party bodily injury or property damage caused by your work activities. Example: your apprentice drops a hammer through a neighbour’s window, or a visitor trips over a site hazard. It does not cover faulty workmanship or design errors.

Professional Indemnity Insurance covers financial loss suffered by a client due to your negligent advice, design, or project management. Example: you specify an undersized beam that later fails, requiring $150,000 in rectification. Public liability won’t respond—professional indemnity will.

In 2026, a builder with a design-and-construct endorsement in Queensland must hold professional indemnity cover of at least $2 million per claim. In Victoria, the VBA recommends it for any builder providing design services, though it’s not yet a universal licence condition. Premiums for a $2 million professional indemnity policy for a small builder start around $1,800 per year, rising to $5,000+ for higher-risk trades (e.g., structural engineering or hydraulics).

3. How much does builders insurance cost in 2026?

Premiums vary dramatically by state, trade, turnover, claims history, and sum insured. But here are realistic 2026 ranges for a registered builder with a clean record:

• Public Liability ($20 million): $3,500–$8,500 per year
• Home Building Compensation (HBC): 1.5%–3.5% of contract value. For a $500,000 home, that’s $7,500–$17,500
• Professional Indemnity ($2 million): $1,800–$5,000 per year
• Workers’ Compensation: Varies by state and wage bill; roughly 2%–6% of gross wages
• Tools and Equipment Insurance: $500–$2,000 per year for $50,000–$100,000 cover
• Contract Works Insurance (optional but recommended): $1,000–$4,000 per project

In 2025, the average combined insurance cost for a mid-sized residential builder (turnover $3 million) was approximately $22,000–$35,000 per year. That figure has risen about 12% since 2023, driven by increased reinsurance costs and a spike in defect-related claims in NSW and Victoria.

4. What is the difference between HBC insurance and contract works insurance?

This distinction trips up many builders—especially those moving from commercial to residential work.

Home Building Compensation (HBC) Insurance is a statutory product mandated by state governments. It protects the homeowner if you cannot complete the work or rectify defects due to death, disappearance, insolvency, or licence suspension. It does not cover your own losses or materials on site.

Contract Works Insurance (sometimes called “construction all risks”) is an optional but highly recommended product. It covers physical loss or damage to the works themselves during construction—fire, storm, theft, vandalism, and sometimes accidental damage. It also covers your plant, tools, and materials on site. A typical contract works policy for a $1 million residential project costs $1,500–$4,000.

In 2026, I advise every builder to hold contract works cover for any project over $200,000. Without it, a fire that destroys a partially completed frame leaves you liable for the rebuild cost—and your HBC policy will not respond.

5. Are there any new insurance requirements coming in 2026?

Yes. Several states are tightening requirements.

• New South Wales: From 1 July 2026, NSW Fair Trading will require all licensed builders to hold public liability insurance with a minimum $20 million limit (up from $10 million in many cases) for any project valued over $500,000. This change follows a review of the Home Building Act that found 23% of defect claims exceeded $10 million in 2024.

• Queensland: The QBCC is consulting on a proposal to mandate professional indemnity insurance for all licensed builders who provide design services, effective 1 January 2027. The minimum cover would be $2 million per claim.

• Victoria: The VBA is expected to announce a new mandatory “builder’s risk” insurance product for all domestic building work over $50,000, separate from existing HBC cover. This would be similar to contract works insurance but compulsory.

• South Australia: From 1 March 2026, the SA Building Work Contractors Act will require all builders to provide evidence of public liability insurance (minimum $10 million) at the time of licence renewal—not just at application.

If you operate across multiple states, you need to track these changes individually. I recommend setting calendar reminders for each state’s regulatory update cycle.

6. What happens if I let my insurance lapse mid-project?

This is one of the most serious compliance breaches a builder can make.

If your insurance lapses while a project is underway, you are technically working unlicensed. The consequences vary by state:

• NSW: Immediate suspension of your licence. You must cease work and notify the homeowner. Reinstatement can take 4–6 weeks and may require a $5,000–$10,000 penalty.
• Victoria: The VBA can issue a fine of up to $50,000 for an individual or $250,000 for a company. Repeat offenders face licence cancellation.
• Queensland: The QBCC can issue a penalty of 40 penalty units (currently $5,792) per week of uninsured work. You also lose your entitlement to claim for unpaid work under the Queensland Building and Construction Commission Act.

In every state, the homeowner can terminate the contract without penalty if you are uninsured. And if a defect or injury occurs during the lapse, you are personally liable for all costs.

I have seen builders lose their life savings because they forgot to pay a renewal notice. Set up auto-renewal. Check your policy dates monthly. And keep a digital copy on your phone.

7. Can I use the same insurance for both residential and commercial projects?

Rarely. Most standard builder policies are underwritten for either residential or commercial work, not both.

Residential policies typically exclude projects over a certain value (often $5 million), multi-storey dwellings, or work involving hazardous materials (asbestos, contaminated soil). Commercial policies usually have higher minimum premiums, broader coverage for professional fees, and specific endorsements for contract works.

If you do both types of work, you need a “mixed-use” policy or separate policies. In 2026, a mixed-use policy for a builder with $5 million residential and $3 million commercial turnover costs roughly $8,000–$15,000 for $20 million public liability cover. Be explicit with your broker about the split—many claims are denied because the policy wording defines “residential” too narrowly.

8. How do I choose the right excess level?

Excess (or deductible) is the amount you pay before insurance kicks in. The standard excess for public liability is $500–$2,500 per claim. For HBC insurance, it’s typically $500–$2,000.

Higher excess = lower premium. But be realistic about your cash flow. If you can’t afford a $5,000 excess mid-project, don’t choose it to save $300 per year.

My rule of thumb: set your excess at the highest amount you could comfortably pay from your project float within 14 days. For most builders, that’s $1,000–$2,500. Anything higher is a false economy unless you have significant cash reserves.

9. Do I need insurance for subcontractors?

Yes—but not always in the way you think.

Your public liability policy should cover your subcontractors as “additional insureds” while they’re working under your direction. But this does not cover their own tools, their own employees, or their own professional liability.

You should require every subcontractor to provide:

• A certificate of currency for their own public liability insurance (minimum $10 million)
• Workers’ compensation insurance (if they employ anyone)
• Evidence of any relevant trade-specific insurance (e.g., electrical contractors need professional indemnity)

In 2026, about 60% of builders I work with have been caught out by a subcontractor’s lapsed policy. Always verify coverage before they start—and keep copies on file for at least seven years.

10. What is the statute of limitations for making a claim against my insurance?

This varies by policy type and state legislation.

• Public liability claims: Typically 3–6 years from the date of the incident, depending on the state. In NSW, it’s 3 years for personal injury, 6 years for property damage.
• Home Building Compensation claims: In most states, homeowners can claim for structural defects up to 6 years after completion, and for non-structural defects up to 2 years. In NSW, the period is 6 years for major defects, 2 years for minor defects.
• Professional indemnity claims: Usually 6 years from the date of the negligent act, but can extend to 15 years in some states (e.g., Queensland for structural defects).

Your policy must be in force at the time of the incident—not when the claim is made. This is why “claims-made” policies (common for professional indemnity) are different from “occurrence-based” policies (common for public liability). Know which type you hold.

11. Can I get insurance if I have a poor claims history?

Yes, but it will cost more—and you may need to use a specialist insurer.

In 2026, builders with one claim in the past 3 years can expect a 20–40% premium loading. Two or more claims may result in a 50–100% loading, or outright declination by standard insurers.

Specialist insurers (e.g., those underwriting through Lloyds) will often accept builders with a claims history, but at a higher premium and with stricter policy conditions. For example, you may be required to implement a formal quality management system, conduct regular site inspections, or use only approved subcontractors.

If you’ve had multiple claims, I recommend working with a broker who specialises in construction insurance—not a generalist. They can present your risk profile in the best light and negotiate terms.

12. How do I make a claim without damaging my renewal premium?

You can’t entirely avoid a premium impact, but you can minimise it.

First, only claim for genuine losses that exceed your excess by a significant margin. If a $2,000 claim is likely to increase your premium by $3,000 over three years, it’s not worth claiming.

Second, if you must claim, document everything thoroughly. Insurers penalise builders who are perceived as “claims-prone” or poorly managed. A well-documented claim with clear evidence of corrective action (e.g., improved site safety, retrained staff) is less damaging than a vague, poorly supported claim.

Third, consider a “claims-free discount” program. Some insurers offer 5–10% discounts for each year without a claim, up to a maximum of 25%. If you have a small claim, it may be cheaper to pay it yourself and preserve your discount.

13. What is the difference between “defects liability” and “public liability” cover?

This is a critical distinction that many builders misunderstand.

Public Liability Insurance covers accidental injury or property damage caused by your work during the policy period. It does not cover the cost of rectifying your own defective workmanship.

Defects Liability Insurance (sometimes called “latent defects insurance” or “structural warranty insurance”) covers the cost of repairing structural defects that appear after completion, even if you are still trading. This is not a standard product for most builders—it’s typically purchased by developers or owners of multi-unit buildings.

For most registered builders, your HBC insurance covers defects during the statutory period (6 years for structural, 2 years for non-structural). But if you build commercial projects or multi-unit residential developments, you may need a separate defects liability policy. Premiums start at around $10,000 per project for a $5 million cover.

14. How do I compare insurance quotes effectively?

Don’t just compare premiums. Compare policy wordings.

Here are the five things I always check:

1. Exclusions: What is not covered? Common exclusions include asbestos removal, piling works, demolition, and work over three storeys.
2. Sublimits: Does the policy have lower limits for specific risks (e.g., $1 million for professional fees, $500,000 for contract works)?
3. Territorial scope: Does it cover work in all Australian states and territories? If you travel interstate, check.
4. Claims handling: Does the insurer have a dedicated construction claims team? Or will you be dealing with a generalist call centre?
5. Financial rating: Is the insurer rated by A.M. Best or S&P? A “B+” rating or lower may indicate financial instability.

Online comparison platforms let you compare quotes from multiple insurers in minutes, but I always recommend having a broker review the final policy wording before you bind. A $100 broker fee could save you $50,000 in a denied claim.

15. What should I do if my insurer rejects a claim?

First, don’t panic. Most claim rejections are due to procedural errors, not genuine coverage gaps.

Here’s your step-by-step:

1. Request a formal declinature letter. The insurer must provide a written explanation of why the claim was denied, including the specific policy clause.
2. Check the policy wording yourself. I’ve found errors in 1 in 10 declinature letters—the insurer’s claims team sometimes misinterprets their own policy.
3. Lodge a complaint with the insurer’s internal dispute resolution team. Under ASIC regulations, they must respond within 45 days.
4. Escalate to the Australian Financial Complaints Authority (AFCA). AFCA can award compensation of up to $1 million for disputes. In 2024–25, AFCA upheld 42% of construction insurance complaints in favour of the policyholder.
5. Seek legal advice. A solicitor specialising in insurance law can often negotiate a settlement without going to court.

Remember: a claim rejection is not final until you have exhausted all dispute resolution avenues. Many builders give up too early.

FAQ

How do I know if my HBC insurance is compliant with my state’s requirements?

Check your state building authority’s website for the approved list of insurers. In NSW, only insurers authorised by NSW Fair Trading can issue HBC policies. In Queensland, the QBCC maintains a list of “approved insurers” that changes quarterly. As of 2026, the major approved providers include QBE, Allianz, Calliden (now part of IAG), and certain Lloyd’s syndicates. If your policy is not from an approved insurer, it is invalid for licensing purposes.

Can I transfer my insurance to a new project?

Most public liability policies are “annual aggregate” policies—they cover all your projects within the policy period, not a specific project. However, HBC insurance is project-specific and cannot be transferred. If you cancel a project, you may be entitled to a partial refund of the HBC premium, but this depends on the insurer’s cancellation policy. Always read the cancellation clause before purchasing.

What is the minimum public liability cover for a builder in Victoria in 2026?

The VBA requires licensed builders to hold public liability insurance of at least $10 million per occurrence. However, many commercial contracts and some residential developers now demand $20 million. If you work on multi-unit residential projects, $20 million is strongly recommended. The VBA also recommends a $20 million limit for builders undertaking any project valued over $1 million.

Do I need insurance for a renovation under $20,000?

In NSW, work under $20,000 does not require HBC insurance, but you must still hold public liability insurance (minimum $10 million) to maintain your licence. In Victoria, the threshold is $16,000. In Queensland, it’s $3,300. Always check your state’s specific threshold—they change periodically. Even if insurance is not mandatory, I strongly recommend it. A single injury on a small job can cost $1 million+ in compensation.

How long does it take to get a builders insurance policy?

For standard public liability and HBC policies, you can get a quote and bind coverage within 24–48 hours if you have all your documentation ready (licence, ABN, claims history, turnover details). Platforms like BizCover can provide quotes instantly for straightforward risks. However, if you have a complex risk profile (multiple states, poor claims history, high-value projects), allow 1–2 weeks for underwriting. Never start work without a confirmed policy number.

What happens if I don’t tell my insurer about a previous claim?

Non-disclosure is one of the most common reasons for claim denial. If you fail to disclose a previous claim (even if it was settled), the insurer can retrospectively void your policy. This means you have no cover for any claim—current or future. In 2025, the Australian Financial Complaints Authority reported that 18% of construction insurance complaints involved non-disclosure issues. Always disclose everything, even if it seems minor. If in doubt, disclose.

Can I get insurance if I’m a sole trader working alone?

Yes. Many insurers offer policies specifically for sole traders. Premiums are typically lower because there are no employees to cover under workers’ compensation, but you still need public liability insurance (minimum $10 million) and HBC insurance for residential projects. Your tools and equipment can be covered under a separate policy or as an add-on to your public liability. Expect to pay $2,000–$5,000 per year for a sole trader with a clean record.