The Consumer
Side

Let's Start With a Scenario

You sign a building contract for $1.5 million. Construction is going reasonably well — frame up, roof on, windows in, plastering complete. You're at what the industry calls fixing stage: joinery being installed, electricals being rough-in, maybe 85% done by cost. You have paid your builder in staged instalments, as the contract required.

Then the builder goes into administration. Your project stops overnight. You have a half-finished house, an active building permit, no occupancy permit, and a contract with a company that no longer exists in any meaningful sense. You have Domestic Building Insurance. You paid for it — it was folded into the build cost. The certificate is sitting in your files.

Here's what you are about to find out: the maximum you can recover under that policy is $300,000. Not $300,000 for incomplete works, plus $300,000 for defects, plus $300,000 for anything else. $300,000 in total. For everything. That is the aggregate cap for all claims under a single DBI policy against a single dwelling. It has been $300,000 since 2014.

The cost of engaging a new builder to take over a $1.5M project at fixing stage — mobilisation, re-quoting, remediation of defective work, the premium that any builder charges to inherit someone else's half-finished project — can easily exceed $300,000. The insurance does not scale with your contract value. It is fixed.

What DBI Is, And Who Actually Buys It

Domestic Building Insurance is mandatory for any residential building project in Victoria valued above $16,000. It is purchased by the builder, on the homeowner's behalf, before work commences or any payment is received. The homeowner pays for it — the premium is embedded in the build cost — but has no direct relationship with the insurer. They receive a certificate. They are told they are covered. And then they proceed with construction, rarely thinking about the instrument again until something goes wrong.

This asymmetry — where the person most exposed to the risk is the least likely to understand the product — is the foundational design problem with DBI. It is not unique to Australia. But it is particularly acute here, because the product is statutory and quasi-monopolistic. There is no competitive market for homeowners to compare coverage. The policy terms are set by ministerial order. What you get is what you get.

The $300K Question: Per Policy, Not Per Claim

One of the most common misunderstandings about DBI — and one I hear asked by people who should know better — is whether the $300,000 cap applies per claim event, or as an aggregate total. The answer matters enormously.

If it were per claim, a homeowner could theoretically claim $300,000 for incomplete works, then make a separate $300,000 claim for structural defects, and further claims for non-structural defects. You might wonder: could you even split the permits — one for the slab, one for the frame, one for fit-out — and get a separate $300,000 policy for each?

The answer to all of these is no. The legislation is explicit: the $300,000 is the aggregate liability limit for all claims in respect of any one home. Incomplete works, structural defects, non-structural defects, alternative accommodation, legal costs — every dollar claimed under any category draws from the same pool. Once it's gone, it's gone.

As for staging permits to obtain multiple policies on a single dwelling: the Auditor-General's 2025 review specifically flagged this practice as a known compliance risk, noting a case where a building surveyor was intentionally issuing staged permits just below the $16,000 threshold to avoid the DBI requirement altogether. The guidance since then has tightened. Attempting to manufacture multiple DBI policies on a single home through permit staging would be a compliance breach, not a coverage strategy.

The Stage-of-Build Problem

The $300,000 cap does not affect all homeowners equally. Where you are in your build when a builder collapses determines almost everything.

At slab stage, a homeowner has typically paid the deposit (usually 5%) and the base/slab progress payment. The remaining contract value is largely unpaid. DBI's 20% incomplete works cover, applied to a $1.5M contract, gives you $300,000 — which may be enough to complete a project that has barely started, because most of the cost is still ahead.

At fixing stage — plaster done, joinery going in, near-complete — the picture flips. The homeowner has paid for 80–85% of a finished house. What remains looks small on paper. But the actual cost of completion has nothing to do with the percentage of work left. A new builder won't quote based on remaining contract value. They'll quote based on what it actually costs to mobilise onto an unfamiliar site with someone else's construction history, verify prior work, re-coordinate trades, and deliver a certificate of occupancy — all while absorbing the liability risk of signing off on work they didn't supervise from the start.

Porter Davis proved this precisely. When the company collapsed in March 2023, homeowners at every stage of construction entered the DBI system. Those near completion consistently found the gap between their actual costs and the $300,000 ceiling to be the most painful. They were closest to the finish line, and furthest from adequate coverage.

What It Actually Takes to Claim

Here is where the "insurance exists" and "insurance works" gap becomes most visible. Making a DBI claim is not the same as making a car insurance claim. You cannot call a number, lodge the damage, and wait for a cheque. The policy is — by legislative design — a last resort instrument. Before it activates, you must first exhaust every other avenue of recovery.

What that means in practice, for a homeowner whose builder is not insolvent but is simply not responding, not fixing, not engaging:

The question worth sitting with is not whether this process is theoretically navigable. It is. The question is: how many homeowners, in the middle of a building crisis, with a mortgage ticking, rent to pay, and no occupancy permit on a near-finished house, have the financial and psychological endurance to run this gauntlet for two to three years — for a maximum outcome of $300,000?

Most don't. Most settle. They accept whatever the builder offers, or they find another way, or they absorb the loss. That is not a failure of individual resolve. It is a predictable outcome of a system that was designed to be hard to access.

What the BPC Reform Changes

The 2025 consolidation of VBA, DBDRV, and VMIA's DBI function into the Building and Plumbing Commission is a genuine structural improvement. Having one body with visibility across regulation, dispute resolution, and insurance removes the fragmentation that allowed builders to exploit gaps between agencies.

The most important substantive change is the expanded DBI trigger. Under the BPC regime, a builder who fails to comply with a BPC rectification order — not just one who has died, disappeared, or become insolvent — can now trigger the insurance. The "technically contactable but doing nothing" trap, which was the most common pattern of consumer harm before, now has a mechanism to break through it sooner.

What has not changed is the $300,000 aggregate cap, set in 2014. Residential construction costs in metropolitan Melbourne have moved materially in the twelve years since. The gap between the insurance ceiling and the actual cost of a building failure at the upper end of the residential market is structural, not incidental. It reflects a policy design that was calibrated for a different cost environment and has not been updated.

The Occupancy Permit Wrinkle

There is one more dimension to this that rarely gets discussed outside the industry. When a builder collapses mid-project, the building permit remains live. But the builder — the entity named on that permit — is gone. A new builder must be engaged to complete the work. And at the end of that process, someone must issue the occupancy permit.

That someone is the building surveyor. And this is where the scenario splits. If the original building surveyor remains on the project throughout — which is possible, as their appointment is separate from the builder's — they have continuous knowledge of the construction history. They know what they inspected, what passed, and what didn't. Their position, while still carrying full s134 liability from the occupancy permit date, is at least grounded in that continuity.

But if the incoming builder brings their own preferred building surveyor — or if the original surveyor declines to continue — the new surveyor is being asked to inspect and certify stages of work they had no hand in supervising. They can commission their own inspections and expert reports. They cannot go back in time. Their s134 liability exposure begins from the date of the occupancy permit they issue, for a construction history they can assess but did not observe. That is a materially different risk profile from a project they have followed from permit to completion.

This is not hypothetical. This is what building surveyors across Victoria were navigating in the months after Porter Davis collapsed, as Simonds, Metricon, and others were brought in to complete over a thousand unfinished homes. The DBI system's response to builder insolvency creates downstream pressure on the practitioners who close out those projects — and that pressure is invisible in the DBI coverage structure.

Still a Last-Resort Instrument

DBI has been improved. The BPC reform is real. The expanded trigger is meaningful. But in its essential character, DBI remains a last-resort product with a fixed cap in a variable-cost environment, accessed through a process that takes years and costs money before a single dollar is recovered.

The umbrella metaphor from Part 1 of this series applies here too, with one modification. The DBI umbrella is not just untested until it rains. It is an umbrella with a maximum coverage radius — and if the storm is larger than the radius, you are getting wet regardless of whether the umbrella opens.

"Insurance exists" is a true statement. It is not the same as "insurance works" — not at every contract value, not at every build stage, and not without a process that costs time, money, and resilience that not every homeowner has in reserve.

Next in this series: The Cross-Border Lens — what Hong Kong's consumer-facing insurance culture reveals about how differently risk can be distributed when it is made visible rather than embedded in institutional mandates.

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