TLDR: Most construction disputes in Brisbane don’t start on site, they start on page four of a contract nobody read properly. Variations, payment terms, and defect liability clauses cause more grief than bad tradesmanship ever does. Here’s what actually trips people up.
The Variations Clause Is Where Budgets Go to Die
Ask any homeowner around Ashgrove or Paddington who’s renovated a Queenslander and they’ll tell you the same story. The quote looked fine. Then three months in, a “variation” for extra bracing or unexpected asbestos removal added another $40,000 they never budgeted for.
Most standard form contracts in Queensland, including the QBCC’s own template, let builders charge for variations with minimal upfront detail. If your contract doesn’t require a written variation notice with a price and a reason before work starts, you’ve got no leg to stand on when the invoice shows up. Verbal agreement to a variation, even a quick nod on site, can be enough to bind you.
What to Actually Check Before Signing
Look for a clause that spells out how variations get priced, not just that they can happen. A decent contract will require the builder to issue a written quote for any variation over a set dollar amount, usually somewhere between $500 and $1,000, before the work proceeds. If that clause is missing or vague, push back before you sign, not after the concrete’s poured.
Payment Schedules That Front-Load the Builder
Queensland law caps deposits at 20 percent for domestic building contracts under $3.3 million, and lower again for smaller jobs. But some contracts get creative with staged payments that don’t line up with actual progress. You’ll see a “fixing stage” payment due before the fixing has properly started, or a final payment structured so most of the money’s gone before defects even show up.
If a payment schedule looks front-loaded, that’s a red flag. You want your leverage sitting with the builder for as long as possible, not handed over in week two.
Retention Amounts Matter More Than People Think
A retention clause holds back a small percentage, often 5 percent, until defects are fixed after handover. Not every contract includes one. If yours doesn’t, ask why not. Builders who resist a retention clause are sometimes the ones who take longest to come back and fix the cracks in the render.
Defect Liability Periods Are Shorter Than You Think
Most contracts set a six month defects liability period after practical completion. That sounds generous until you realise structural issues in a Brisbane build, especially on reactive clay soils out in places like Forest Lake or parts of the Ipswich corridor, sometimes don’t show up for a full wet season. Six months might not even get you through one summer of storms.
Read the clause on what counts as a defect versus normal wear. Some contracts define “defect” so narrowly that hairline cracking, minor settling, or paint issues get waved off as expected, not covered.
Statutory Warranties Still Apply Regardless
Even with a short contractual defects period, Queensland’s statutory insurance scheme through the QBCC gives structural cover for six years and six months from completion, and non-structural cover for one year. That’s separate from whatever the contract says. Builders sometimes word their contracts in a way that makes it sound like the six-month clause is your only protection. It’s not, but you shouldn’t have to rely on knowing that.
Termination Clauses Written to Favour the Builder
Some contracts let a builder terminate for a minor payment delay, even a few days, while the homeowner needs to prove a much higher bar, like repeated serious breaches, before they can walk away. That imbalance is worth catching early, because once you’ve paid a deposit and demolition’s started, you’ve got almost no real exit.
Check whether termination rights run both ways on roughly equal terms. If they don’t, that’s a negotiating point before signing, not something to raise once you’re already committed.
Dispute Resolution Clauses Nobody Reads Until It’s Too Late
Buried near the back, most contracts include a clause dictating how disputes get resolved, mediation first, then adjudication or arbitration, sometimes with a jurisdiction clause naming a specific court. Some of these clauses make it genuinely expensive to chase a builder for defective work, requiring private arbitration that costs more than the defect itself.
The QBCC offers a free dispute resolution service for most residential building complaints, and a good contract won’t try to contract you out of that right. If yours has a clause that looks like it’s steering you away from the QBCC process and into expensive private arbitration, get a solicitor to look at it before you sign anything.
Getting a contract checked by a construction lawyer before signing costs a few hundred dollars. Fixing a bad one after the fact costs a lot more, in money and in months of your life you won’t get back arguing over cracked slabs.
