Contract Works & Public Liability Insurance for Australian Builders
Contract works and public liability insurance is the foundation cover for any construction business in Australia. Whether you’re building homes, fitting out commercial spaces, or managing civil works, this is the policy that protects the job itself and the people around it.
Contract works covers physical loss or damage to the construction project — the materials, the work in progress, and the finished product until handover. Public liability covers your legal liability if a third party is injured or their property is damaged because of your construction activities.
Most builders need both. Most head contractors require both before you step on site. And most standard policies leave gaps that only show up when something goes wrong.
What Contract Works Insurance Typically Covers
Contract works insurance (sometimes called construction all risks or builders risk) generally covers accidental physical loss or damage to the works during the construction period. Depending on the policy wording and the options selected, cover may extend to:
- The permanent and temporary works, including materials and labour
- Principal-supplied materials (if declared)
- Existing structures you’re working on or adjacent to (if declared)
- Materials in transit to site
- Materials stored off-site (if declared)
- Plant, tools, and equipment (owned, hired, or employee-owned — if selected)
- Testing and commissioning
- Removal of debris after a covered loss
- Professional fees for redesign and recertification
- Expediting costs to get the project back on track
- Temporary protection of the works
- Defects liability period cover (typically 12 months post-practical completion)
The key word in every line above is “if”. Contract works policies are highly customisable, and what’s included depends on the wording, the schedule, and the endorsements. A policy that covers one builder’s full exposure might leave another builder significantly underinsured.
What Public Liability Insurance Typically Covers
Public liability insurance responds when a third party — someone who isn’t your employee — suffers bodily injury or property damage arising from your construction activities. This includes:
- Injury to a member of the public near your work site
- Damage to neighbouring properties (vibration, subsidence, collapse)
- Damage to underground services (pipes, cables, utilities)
- Products liability and completed operations (if included)
- Legal defence costs
Public liability is not the same as workers compensation (which covers your employees) and it’s not the same as contract works insurance (which covers the job itself). They protect different things, and you generally need all three.
What’s Typically Not Covered
No insurance policy covers everything. Common exclusions and limitations on contract works and public liability policies include:
- Defective workmanship, design, or materials (the cost of redoing faulty work itself — though resultant damage from a defect may be covered)
- Wear and tear, gradual deterioration, or inherent vice
- Losses caused by war, terrorism, or nuclear events
- Penalties, fines, or liquidated damages under your contract
- Professional liability arising from design services (that’s a PI issue — see Design and Construct Insurance)
- Pollution and contamination (unless a pollution extension is purchased)
- Work outside the territorial limits of the policy
Exclusions vary between insurers and wordings. Some can be bought back with endorsements; others are hard limits. This is where broker review matters — reading the wording, not just the certificate of currency.
Who Needs Contract Works and Public Liability Insurance
If you’re doing construction work in Australia, you almost certainly need this cover. Specifically:
Residential builders — whether you’re building single homes, duplexes, townhouses, or multi-unit developments. Most state licensing authorities and home warranty insurers expect you to carry contract works and public liability cover.
Commercial and industrial contractors — head contractors and subcontractors on commercial projects. The principal’s contract will typically specify minimum insurance requirements, often including contract works with the principal noted as an interested party.
Civil contractors — earthworks, roadworks, drainage, and infrastructure. These projects often involve existing structures, underground services, and public interface risks that make liability cover essential.
Subcontractors and trades — even if the head contractor carries project-wide contract works insurance, you still need your own public liability cover. The head contractor’s policy may not respond to your negligence, and most head contractors require a current certificate of currency before you start on site.
Developers — if you’re managing construction directly rather than engaging a builder under a lump-sum contract, you may need to arrange your own contract works cover for the project.
How Silverback Helps
Silverback is a specialist construction insurance broker. Contract works and public liability is what we do every day — not a side product bolted onto a general business insurance package.
We read your contracts. Construction contracts create specific insurance obligations — minimum limits, interested party requirements, cross-liability clauses, defects liability periods, and principal-arranged vs contractor-arranged cover. We check what your contract requires and make sure your policy responds.
We understand site risk. Petara Tanuvasa, Silverback’s director, came from construction contract administration before becoming a broker. That means we understand practical completion, defects liability, variations, extensions of time, and how claims actually play out on a live project — not just the insurance theory.
We shop the market. As a Steadfast network broker, we have access to multiple insurers and underwriting agencies. We don’t just place your cover with whoever answers first — we negotiate terms, compare wordings, and find the best fit for your specific risk profile.
We manage your renewals actively. No auto-pilot. Every renewal is a chance to review your exposure, update your sums insured, and test the market for better terms. We come to you before the renewal date, not after.
Get the Right Cover for Your Next Project
Whether you need an annual policy, project-specific cover, or a review of your existing arrangement, we can help. Talk to a specialist construction insurance broker who understands what your contracts actually require.
Get a Quote Speak to a Specialist
Call: 0410 152 835 | Email: [email protected]
Frequently Asked Questions
What’s the difference between contract works insurance and public liability insurance?
Contract works insurance covers physical loss or damage to the construction project itself — the materials, the work, and the finished structure. Public liability covers your legal liability to third parties for injury or property damage caused by your construction activities. They protect different things, and most builders need both.
Do I need my own public liability if the head contractor has a project policy?
In most cases, yes. The head contractor’s project policy may not cover your negligence, and almost all head contractors require subcontractors to hold their own public liability with a current certificate of currency. Relying on someone else’s insurance is a risk most contractors shouldn’t take.
What sum insured should I carry for contract works?
Your contract works sum insured should reflect the full completed value of the project, including materials, labour, and any principal-supplied items. Underinsuring means you may only receive a proportion of any claim (average clause). Your broker can help you calculate the right figure based on your contract value.
Does contract works insurance cover defects after practical completion?
Most contract works policies include a defects liability period — typically 12 months after practical completion. During this period, cover usually extends to loss or damage to the works while you’re back on site rectifying defects. The specific terms depend on the wording.
How much does contract works and public liability insurance cost?
Premiums vary depending on your turnover, the type of work you do, your claims history, the contract values, and the limits and extensions you need. A specialist broker can get you competitive terms by presenting your risk properly to the right insurers. Contact us for an indication based on your specific situation.
Can I get a single policy that covers multiple projects?
Yes. An annual contract works policy covers all projects you undertake during the policy period, up to a specified maximum single contract value. This is usually more cost-effective and administratively simpler than arranging project-specific cover for each job. Project-specific policies are available for larger or more complex projects.
Silverback Insurance Pty Ltd (CAR 1283436) is a Corporate Authorised Representative of Australian Broker Network Pty Ltd (AFSL 253131). The information on this page is general advice only and has been prepared without taking into account your particular objectives, financial situation or needs. You should consider the relevant Product Disclosure Statement and policy wording before making any decision about insurance. Terms, conditions, limits and exclusions apply.
Related Cover
Most builders we look after carry several of these alongside Contract Works & PL:
- Surety Bonds — Performance, retention and tender bonds for the same projects
- Trade Credit Insurance — Protect your receivables when builders or principals default
- Professional Indemnity — For builders carrying any design responsibility under D&C contracts