Do you need insurance to renovate a house in Australia?

The question I get asked least and should get asked most is whether you need insurance to renovate a house. People agonise over the reno budget and the resale price, then leave a half-gutted, empty house standing for four months on a policy that may restrict vacancy or building-work cover. If that house burns down, floods, or someone gets hurt on site, the loss can wipe out the whole flip and then some. So before you swing a hammer, the honest answer is that you need suitable cover for the renovation and vacancy risks, and you need the insurer to confirm whether your existing policy provides it.

This is the one cost on a flip that returns nothing when everything goes right and saves the entire project when one thing goes wrong. It rarely makes the spreadsheet, and it is the line I would least like to be missing.

Do you need insurance to renovate a house? You need suitable cover

Here is the trap. A flip is empty for most of the time you own it, and for that whole stretch it is both a construction site and an unoccupied building. Those are two of the risks a standard home policy is least willing to carry, and stacking them together is exactly the combination your existing insurer did not price for.

The people who get burned are not only the ones who bought no insurance. They include owners who assumed their existing cover would stretch to a renovation, kept paying the premium, and only found out at claim time that it did not. Whether you take on the job yourself or hand it to a builder, confirm in writing who covers the works, the existing house and liability for people who come onto the site. The answer depends on the policy, building contract, project and state.

Why your existing home policy quietly stops covering you

Two things in a standard home and contents policy work against a flip.

The first is vacancy. Many home policies apply extra conditions, excesses or exclusions once the property has been unoccupied for a stated period, often 60 or 90 days but varying by policy. A cosmetic flip can run past that, and a full renovation can too. Crossing the policy's period can affect a claim for theft, malicious damage or water damage even though you kept paying the premium.

The second is the renovation itself. Insurers treat a major renovation as a change to the risk, and many standard policies simply exclude damage that happens during building work, or will not cover the existing structure while it is torn open. A house with no roof, no locks and no occupant is a different animal from the tidy home the policy was written for.

The single most important thing you can do costs nothing: tell your insurer before you start, and tell them if the place will sit empty. Sometimes they will endorse the existing policy for a small job. Sometimes they will tell you that exclusions apply and you need something built for the work. Ask for the answer in writing and read the PDS, because failing to notify the insurer or meet the policy conditions can affect your cover and any later claim.

Contract works insurance: the cover built for a building site

The policy that actually fits a renovation is contract works insurance, sometimes called construction insurance. It covers the building works and the materials on site against things like fire, storm and theft while the job is underway, and a good policy can extend to cover the existing structure you are renovating on the same cover, so the half-finished house is protected alongside the new work.

The catch most first-time flippers miss is who that cover belongs to. NSW Fair Trading says builders and trade contractors should carry contract works insurance, but the required cover and contract terms vary by state. A builder's policy may not cover your whole existing house, owner-supplied materials or every risk you retain. You want that scope named in writing before work begins, whether through the builder's policy, an existing-structure extension or separate owner-arranged cover.

If you are running the job as an owner-builder, there is no builder's policy to lean on. The works, the materials and the existing house are all yours to insure, and contract works insurance is the product that does it.

Public liability: the claim that can dwarf the deal

Property damage is the risk people picture. The one that can be far larger is someone getting hurt.

A renovation site sees trades, deliveries, the odd curious neighbour and sometimes you. If a person is injured because of the building work and you own the property, you can be the one held liable, and an injury claim can run to a number that makes the whole flip look like a rounding error. This is why public liability cover is strongly recommended for owner-builders and anyone contracting building work on a property they own. Note that a builder's own public liability protects the builder's legal liability, not automatically yours, so do not assume their certificate covers you as the owner.

Contract works and public liability are often sold together as a single owner-builder or renovation policy, which is the tidy way to cover both the property risk and the people risk in one place.

The owner-builder wrinkle worth knowing

Two owner-builder points sit next to insurance and get tangled up with it.

First, you generally cannot insure your own labour. If you do the work yourself and it is defective, that is not what these policies are for. They cover sudden damage and liability, not your workmanship.

Second, some states impose separate home-warranty, domestic-building-insurance or disclosure obligations when owner-builder work is sold within a stated period. Those rules and thresholds vary, and they are licensing and resale questions rather than substitutes for site-risk cover. I walked through the state thresholds in do you need a licence to flip a house. Keep the two ideas separate: contract works and public liability address risks while you own and renovate; warranty and disclosure rules may apply when you sell.

Insurance is a holding cost, so put it in the feasibility

The reason insurance falls off the flip budget is that it feels like admin, not a cost. It is a cost, and it belongs with the other money that leaves your pocket every month you own the place: interest, rates, water and utilities. A renovation or owner-builder policy is part of your carry, so it goes straight into the holding cost calculator alongside the rest, and it is one of the line items I flagged in the six-month holding cost walkthrough.

It is not usually a large number against the deal, but it is a real one, and leaving it out is how a feasibility that looked fine on paper comes up short in the bank. When you run a deal through a full analysis or score it on feasibility, the discipline is to cost the whole hold, insurance included, not just the buy and the reno. The sample analysis shows how the running costs stack up over a hold.

How I set up cover on a flip

The routine is short, and it is the same every time.

• Call the insurer before settlement, describe the job, and ask in plain terms whether the property is covered while it is renovated and while it is empty. Get the answer in writing.
• If the existing policy will not stretch, arrange contract works insurance that includes the existing structure, plus public liability, for the length of the build.
• If a builder is doing the work, read their contract works and public liability certificates and confirm what they do and do not cover for you as the owner. Close the gap before anyone starts.
• Put the premium in the holding costs, not in a mental note.

Insurance is the cheapest part of a flip you will resent paying and the most expensive one to have skipped. If you want the full picture of where it sits among the other costs, the cost to flip a house breakdown and the beginner's playbook both put it in context. FlipPro covers NSW, VIC and QLD with live zoning data now, and you can check the pricing and run your next deal end to end before you commit to the buy.

This is general information only and not financial, insurance, legal or town-planning advice. Insurance products, exclusions, thresholds and premiums vary by insurer, state, site and policy, and change over time. The descriptions above are general and indicative from sources current at the time of writing. Read the product disclosure statement and get advice from a licensed broker or insurer for your own circumstances before you rely on any cover.

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