My Builder Won’t Fix the Defects: What Are My Options in NSW?
It usually doesn’t start as a fight, when your Builder Won’t Fix the Defects. It starts with a phone call that doesn’t get returned. Then an email that gets a one-line reply. Then nothing.
Meanwhile the problem is still there. The crack over the doorway keeps opening after you patch it. The water mark on the bedroom ceiling comes back after every heavy rain. The tiles in the bathroom sound hollow when you tap them. You’ve raised it. The builder says it’s normal settlement, or it’s wear and tear, or it’s something you did. And slowly the conversation stops being about the building and starts being about who’s right.
If you’ve reached the point where your builder won’t fix the defects, you’re not stuck — but you do need to change how you’re approaching it. The thing that decides most NSW building disputes isn’t who shouts loudest or who’s most upset. It’s evidence. This guide walks through what your real options are, what counts as proof, and how to stop going in circles.
First, understand why the conversation stalled
Most homeowners assume the builder is being difficult on purpose. Sometimes that’s true. More often, the conversation has stalled because nobody has established two things clearly: what is actually wrong, and what caused it.
That distinction matters more than it sounds. A builder can honestly believe a crack is normal movement while you honestly believe it’s a structural fault. Until someone independent looks at the evidence and says which it is, you’re both just stating opinions. You repeat yours, they repeat theirs, and nothing moves.
This is why “my builder won’t fix the defects” is rarely solved by arguing harder. It’s solved by reframing the dispute around facts that can be tested:
- What exactly is failing — is it the waterproofing membrane, the flashing, the substrate, or the way two trades met at a join?
- When did it likely start — during design, during construction, at handover, or through later use?
- Why is it defective — does it fall short of the building contract, the approved plans, or the relevant Australian Standard?
Once those questions have answers, the dispute usually becomes manageable. Before they do, it tends to stay personal.
Your options, in the order most NSW homeowners take them
There’s a logical path here, and skipping steps usually costs you time rather than saving it.
- Put it in writing — properly
If your only record is a few text messages and a couple of phone calls, you have a weaker position than you think. Write to the builder, clearly listing each defect, where it is, and what you’re asking them to do about it. Keep it factual and unemotional. Keep a copy.
This isn’t busywork. NSW Fair Trading and NCAT will both want to see that you genuinely tried to resolve the matter directly before escalating. A clear written record is the foundation everything else is built on.
- Get independent evidence of the defects
This is the step most homeowners skip, and it’s the one that changes everything. An independent building consultant inspects the property and documents what’s actually wrong, what likely caused it, and what it would cost to put right.
The reason this matters: at every later stage — mediation, Fair Trading, NCAT — the question becomes can you prove it? A builder’s denial is just a denial. An independent report that assesses the work against the contract and the relevant standards is evidence. Your statutory warranties under the Home Building Act 1989 also run on a clock — six years for major defects and two years for all other defects, both from completion — so getting a professional view early protects you if the matter drags on.
The strongest move in a building dispute is a neutral technical view before positions harden completely.
- Lodge a complaint with NSW Fair Trading
In NSW, you generally can’t go straight to the tribunal. NSW Fair Trading is the gatekeeper. You lodge a complaint, and they’ll typically offer a mediation step — often including an inspection by a Fair Trading building inspector who can issue a rectification order if they agree there are defects.
According to NSW Fair Trading, building inspectors assist in around 2,500 disputes a year, and more than 80% of those are resolved without ever escalating to NCAT. In other words, most disputes don’t end up at a tribunal — but how well yours goes depends heavily on how prepared you are. Turning up to a Fair Trading inspection with clear documentation and an independent report puts you in a far stronger position than turning up with a grievance.
- Apply to NCAT if it’s still unresolved
If Fair Trading doesn’t resolve it, the next step is the NSW Civil and Administrative Tribunal (NCAT). NCAT hears residential building disputes and can order a builder to rectify defective work or to pay compensation. It handles claims up to a substantial value, and it’s designed to be more accessible and lower-cost than going to court.
At NCAT, evidence is everything. If the builder disputes the defects, the Tribunal relies heavily on independent expert evidence to decide. This is where an Expert Witness Report and, in most multi-defect matters, a Scott Schedule do the heavy lifting — they set out each disputed item, the cause, and the rectification cost in a structure the Tribunal can work through methodically.
What actually counts as proof?
This is the question that quietly decides most disputes, and almost no one explains it to homeowners.
A photo of a crack is not proof of a defect. It’s proof there’s a crack. The gap between those two things is exactly where builders push back — “that’s normal movement,” “that’s a maintenance issue,” “that happened after we left.”
Proof, in a building dispute, means connecting three things:
- The observed condition — what can actually be seen, measured, or tested on site.
- The cause — why it happened, and ruling out the competing explanations the builder will raise.
- The benchmark — the contract, the approved plans, or the Australian Standard that the work falls short of.
A general building inspection often gives you the first one. It tells you what’s wrong. What wins disputes is a report that also nails the second and third — that explains why the failure occurred and why it’s inconsistent with what was required. That’s the difference between “the room is damp” and “the waterproofing membrane was installed without the required falls, which is why water is pooling and tracking into the adjoining room.”
If you take one thing from this article, take this: start documenting now, and get the cause assessed early. Evidence gathered while the defect is fresh is far stronger than evidence reconstructed months later, after a patch-up has muddied the picture.
Do you actually need to go down this path?
An honest answer: not every problem is worth a formal dispute, and you should weigh it up before committing.
If the rectification cost is small and the builder is responsive, a direct conversation or a Fair Trading mediation may be all you need. The full evidence-and-tribunal path makes the most sense when the amount in dispute is meaningful, the builder has genuinely disengaged, or the defect is the kind that gets worse and more expensive if left — water ingress, structural movement, or anything affecting safety.
The cost of independent reports varies widely depending on how many defects are involved, how complex the cause is, and whether site testing is needed. It’s reasonable to ask any consultant for a clear, upfront estimate of scope and cost before you commit — a credible one will give you that rather than a vague figure over the phone. The point of getting advice early isn’t to push you toward a fight. Sometimes the most useful thing an independent expert tells you is that part of your problem is maintenance, or that the claim is smaller than you feared. That clarity is worth having either way.
A note for strata and apartment owners
If your defect affects an apartment or common property, the picture gets more complicated — costs, levies, insurance, and timing all start to interact, and the dispute often involves the owners corporation rather than you alone. The underlying principle is the same (evidence and causation decide it), but the process and the parties differ. If that’s your situation, it’s worth getting tailored advice early rather than following a homeowner-only path.
Frequently asked questions
What can I do if my builder refuses to fix defects in NSW?
Put your complaint in writing to the builder listing each defect, get an independent building consultant to document the defects and their cause, then lodge a complaint with NSW Fair Trading. Fair Trading offers mediation and can issue a rectification order. If that doesn’t resolve it, you can apply to NCAT, which can order the builder to fix the work or pay compensation. Independent evidence strengthens your position at every one of these stages.
How do I prove a building defect if my builder denies it?
You prove a defect by connecting three things: the condition observed on site, the cause of the failure, and the standard or contract term the work falls short of. A photo alone shows a problem but not a defect. An independent report that assesses the work against the building contract and the relevant Australian Standards — and rules out competing explanations like maintenance or normal movement — is what carries weight with Fair Trading and NCAT.
Do I need an expert report to take a builder to NCAT?
It’s not always strictly mandatory for simpler matters, but in practice it’s very difficult to succeed without independent evidence if the builder disputes the defects. NCAT relies heavily on expert evidence to decide technical questions, and most multi-defect matters also require a Scott Schedule setting out each item, its cause, and the rectification cost. Going in with strong, structured evidence is far more effective than going in with a list of complaints.
Is there a time limit to claim against a builder in NSW?
Yes. NSW has statutory warranty periods for residential building work, with different limits for minor and major defects, running from completion of the work. Because these deadlines are strict and missing them can end a claim entirely, it’s important to act early and get a professional view on where your defects sit while you still have time to act. Check the current periods with NSW Fair Trading or get advice specific to your situation.
How much does it cost to resolve a building dispute in NSW?
It depends on the path. Direct resolution and Fair Trading mediation are low-cost. The cost rises if you need independent reports and proceed to NCAT, and varies with the number of defects, the complexity of the cause, and whether site testing is required. Many consultants offer a fixed fee for a defined initial inspection and report, and most will give you an upfront estimate. Weigh the likely cost against the amount in dispute before committing — for small, responsive matters the full process may not be worth it.
Should I get an independent inspection before going to Fair Trading?
Generally, yes. Independent evidence gathered early is stronger than evidence reconstructed later, and it puts you in a far better position at the Fair Trading inspection and at any later NCAT hearing. It can also save you money by clarifying which problems are genuinely defects worth pursuing and which aren’t, before you invest time and emotion in a dispute.
Where to start
If your builder won’t fix the defects and the conversation has stopped going anywhere, the most useful next step is usually an independent view of what’s actually wrong and what caused it — before the dispute hardens any further.
This article is general information about resolving building disputes in NSW and is not legal advice. For advice specific to your situation, speak to a qualified building consultant or solicitor.
