The Questions Most Clients Forget to Ask Their Builder

You've found your block. You've spent months collecting inspiration images and walking through display homes. You've chosen your custom home builder. You're ready.

But before you sign anything, there's a conversation most people skip, the one that can save you tens of thousands of dollars, months of heartache, and a relationship that's turned sour. Building a home is likely the largest financial decision you'll make in your lifetime. The questions you ask upfront are the cheapest insurance you'll ever buy.

Here are the ones most clients forget.

"Can I see the contract, before we get excited?"

It sounds obvious, but most people get emotionally invested in a project before they've read a single clause of the building contract. By that point, saying no feels impossible.

Ask for the draft contract early. Read it. If something doesn't make sense, ask your builder to explain it. If you're still unsure, spend a few hundred dollars on a solicitor to review it before you sign. Pay particular attention to how variations are handled, changes made during the build. This is where cost blowouts most often occur, and where disputes are most likely to start.

Speaking of which, according to the Queensland Building and Construction Commission's 2023–24 Annual Report, the QBCC finalised 5,886 dispute cases in that financial year, a 34.6% increase from a decade earlier. The most common contract breaches involved variation clauses, deposit amounts, and progress payments. These are not exotic problems. They happen on ordinary builds, every week, across the country.

"What's included, and what isn't?"

A quote can look competitive until you realise it doesn't include landscaping, driveways, window furnishings, or site costs. These are almost never included in a base price, and they add up fast, sometimes $80,000 to $150,000 on a high-end build.

Ask your builder for a complete list of exclusions. Then ask about provisional sums, placeholder figures used when a cost hasn't been confirmed yet. Provisional sums for things like site works, joinery, or stone benchtops can shift dramatically between quote and invoice. The more firm numbers you can lock in early, the fewer surprises you'll have later.

"Who will actually be on site every day?"

You're hiring a building company. But who physically manages your project day-to-day? Is it the person you met in the sales office? A site supervisor you haven't met? A subcontractor who has four other jobs running at the same time?

Ask to meet your site supervisor before you sign. Find out how many projects they carry at once. A good site supervisor running two or three projects can give each one real attention. Someone juggling ten cannot.

This matters even more on a custom home build or a GC knock down rebuild, where the complexity is higher and decisions need to be made quickly. A distracted site supervisor on a standard project is an inconvenience. On a bespoke luxury build, they can cost you months.

"How do you handle delays, and who pays for them?"

Delays happen. Trades run late, materials don't arrive, weather intervenes. What you want to know is how your builder communicates when things go wrong, and whether there are any provisions in the contract around liquidated damages, which is the legal term for compensation if the project runs significantly over time.

Ask your builder to walk you through a real scenario: "If our frame is delayed by four weeks, what happens? How are we told? What do you do next?" The answer will tell you a great deal about how the company operates when things get difficult.

"Can I speak to a previous client, not one you've selected?"

Every builder will give you a reference list. And every reference on that list will say good things. That's not dishonesty; it's human nature. But it also means the list tells you very little.

Instead, ask if you can visit a recently completed home. Ask if they can share a client who experienced a significant problem during the build and how it was resolved. Anyone can manage a smooth project. What you want to know is how your builder behaves under pressure. That's the version of them you'll meet at some point during your own build.

"What does the defects liability period actually cover?"

Once your home is handed over, you enter a defects liability period, a window during which the builder is responsible for fixing anything that isn't right. But the scope of this varies significantly, and many clients don't find out until they're trying to chase up a repair and hitting a wall.

Ask specifically: what counts as a defect? What's the process for reporting one? Who do you contact, and what's the expected response time? In Queensland, homeowners have up to six years to make a claim for major structural defects and two years for other defects under the Queensland Home Warranty Scheme, but knowing your rights means nothing if you don't know the process for exercising them.

"Have you built this type of home before?"

This feels rude to ask. It isn't. Whether you're planning a contemporary coastal home, a Brisbane knock down rebuild on a narrow urban block, or a property with significant earthworks and retaining walls, your builder's relevant experience matters.

Ask to see examples of similar work. Ask about the specific challenges your site or design presents and how they've handled them before. A builder who has done ten projects like yours will anticipate problems you haven't thought of yet. One doing it for the first time will learn on your budget.

"What happens if something goes wrong, seriously wrong?"

No one wants to think about this. But asking the question before you sign is far better than asking it after something has actually gone wrong.

Find out whether your builder carries the correct licences and insurance, including home warranty insurance where required. Check their licence status independently, in Queensland, you can do this directly through the QBCC website. Ask what would happen to your project if the company ran into financial trouble mid-build. It's not a common scenario, but it does happen, and the clients who fare best are the ones who understood their protections going in.

One final thought

A builder who welcomes these questions is a builder worth working with. Confidence doesn't hide from scrutiny, it invites it. If asking any of the above makes someone uncomfortable or defensive, that tells you something useful before you've spent a dollar.

The right custom home builder will sit down with you, answer every question thoroughly, and probably think of a few more you should be asking. That's exactly the relationship you want for a project this significant.

So ask the hard questions now. Your future self, standing in the home you imagined, will be very glad you did.