Building or renovating your home is one of the biggest financial decisions you'll ever make. So the last thing you want is to hand over your hard-earned money to a builder who folds halfway through the job.
Unfortunately, it happens more often than most people realise. Builders going under mid-project has become an all-too-common story across Australia, leaving homeowners stuck with an unfinished build, drained savings, and a legal mess to untangle.
The good news? With a bit of due diligence upfront, you can dramatically reduce your risk. Here are six red flags to watch for when vetting a builder, so you can make a confident, informed decision before signing anything.
Before diving into the red flags, it helps to understand what's driving the wave of builder insolvencies across the country. The construction industry operates on razor-thin margins at the best of times. When material costs spike, labour becomes hard to source, or a builder has underquoted to win a job, those margins can disappear fast.
A classic scenario: a builder wins the contract with the lowest price, leaving no financial buffer for the unexpected. Material prices rise, cash flow tightens, subcontractors stop getting paid on time, and suddenly the project stalls. The homeowner is left holding the bag.
Smaller local builders often weather these pressures better than large volume builders, because they tend to run leaner operations, carry lower overheads, and have more personally invested in their reputation. That said, size alone is not a guarantee of financial health. You still need to do your homework.
It's normal for builders to ask for a deposit before work begins. What's not normal is being asked to hand over 30, 40, or even 50 per cent of the total contract value before a single slab has been poured.
A financially stable builder should have sufficient cash flow to get a project underway without relying heavily on your money to fund it. In New South Wales, the Home Building Act limits deposits to 10 per cent for jobs over $20,000. If a builder is pushing for more than this, or pressuring you to pay large sums in cash, that is a serious warning sign.
Make sure your contract has staged payments that align with completed milestones. That way, you're only ever paying for work that has already been done and inspected.
Getting a bargain on your build sounds appealing. But a quote that is dramatically lower than the rest is often a sign of trouble ahead. Underbidding to win work is one of the most common reasons builders run into financial difficulties.
When a builder quotes too low, there is no buffer for unexpected costs. Material price increases, site complications, or even just a run of wet weather can send their margins into the red. What often follows is a builder who starts cutting corners, using substandard materials, or simply walking away from the job.
Ask each builder to walk you through their quote in detail. A reputable builder will be transparent about how they've arrived at the figure, including contingency allowances for the unexpected. If a quote seems too good to be true, it almost certainly is.
Any builder worth their salt should be able to give you contact details for clients from projects completed in the last one to two years. If they can't, or if the references they provide are vague or hard to verify, that's a concern.
When you do speak with past clients, ask the right questions: Did the project finish on time? Were there unexpected cost blowouts? How did the builder handle problems when they came up? Was communication consistent throughout? The answers will tell you a lot about how that builder manages both the financial and practical side of a project.
Beyond client references, check online reviews on Google and industry platforms. Look for patterns, not just one-off complaints. And if you can, visit one of their active job sites to see how they operate in person.
A builder who works with a consistent, trusted team of subcontractors and maintains good relationships with local suppliers is a very good sign. It tells you they pay on time, communicate well, and have a reliable network to draw on.
On the flip side, a builder who is constantly rotating through new subbies or has a reputation for slow payment will struggle to keep tradespeople on your job. If the plumber, electrician, or tiler walks off because they haven't been paid, your project grinds to a halt and you're the one who suffers.
Don't be afraid to ask your builder directly: who are your regular subcontractors? How long have you worked with them? Do you have ongoing accounts with your key suppliers? A builder who is open and confident about these relationships is a builder on solid ground.
In Australia, builders are required to hold a current contractor's licence and carry appropriate insurances, including public liability and home warranty insurance (also known as domestic building insurance, depending on your state). These are non-negotiable legal requirements for residential building work over certain thresholds.
A builder who can't produce a current certificate of currency for their insurance, or whose licence doesn't check out on your state's licensing authority website, is operating in risky territory. Insurance costs money to maintain. When a builder is in financial strife, it's often one of the first things to lapse.
You can verify builder licences in NSW via Service NSW, in Victoria via the Victorian Building Authority, and in Queensland through the Queensland Building and Construction Commission.
High-pressure tactics and a reluctance to use a proper written contract are two of the clearest signs that a builder has something to hide. A financially stable builder with a full order book doesn't need to rush you into signing.
In most Australian states, builders are required by law to use a written contract for residential work above a certain value. This contract should clearly spell out the scope of work, the timeline, payment schedule, and how variations will be handled. If a builder is pushing for a handshake deal or a contract with vague, open-ended terms, that's a problem.
Identifying red flags is only part of the picture. Here are some practical steps to properly vet a builder before committing:
Finding the right builder is about far more than getting the lowest quote. It's about finding someone who is financially stable, professionally accountable, and personally invested in delivering a great result.
Take your time with the selection process. Ask the hard questions. Check the licences, read the contract thoroughly, and trust your instincts if something feels off. A little extra homework at the start of the process is a very small price to pay compared to the cost and heartache of a builder going under halfway through your dream home.
