Choosing the wrong builder in Sydney doesn’t just cost money, it costs time, sleep, and sometimes the relationship you have with your home. So, what are the questions to ask a builder in Sydney?
After working with hundreds of Sydney homeowners and hearing the stories of those who came to us after things went wrong elsewhere, we’ve identified the 7 questions that separate trustworthy builders from the ones who will cost you everything.
Ask every single one before you sign.
Question 1: Consider Questions to ask a builder in Sydney before you hire: Are You Licensed and Insured?
In NSW, builders must hold a valid contractor licence for any work over $5,000, which is one of the first things covered in the questions to ask a builder in Sydney checklist. For work over $20,000, they must also provide Home Building Compensation insurance, so these are essential details to confirm before any building work begins.
What to check:
- Contractor licence: Search the NSW Fair Trading register
- HBC cover: Must be provided before work starts (not after)
- Public liability insurance: Minimum $20M recommended
If a builder hesitates on this question, walk away.
Question 2: Can I See 3 Completed Projects Similar to Mine?
When reviewing questions to ask a builder in Sydney, do not rely on a portfolio alone. Portfolios show what a builder wants you to see, but completed project references show what actually happened and give you a better idea of the builder’s quality, reliability, and final result.
What to ask:
- Can I visit a recently completed job?
- Can I speak directly to those homeowners?
- Do you have projects in my suburb or building type?
A builder who can’t provide references for comparable work is a builder who hasn’t done comparable work.
Question 3: Is This a Fixed-Price Contract?
The difference between a fixed-price contract and a cost-plus arrangement can be $30,000–$100,000 on a mid-sized renovation.
What to confirm:
- Is the quoted price the maximum you’ll pay (subject to agreed variations)?
- What triggers a variation?
- How are variations approved and priced?
Get everything in writing. Every word.
Question 4: Who Is Actually On Site Every Day? (The $50,000 Question)
This is the question most Sydney homeowners never ask — and it’s the one that matters most.
When comparing questions to ask a builder in Sydney, ask who will actually do the work on site. Many builders win jobs and then subcontract most or all of the work to lower-cost trades they have never worked with before, so the homeowner may think they are getting the builder’s own team when they are really getting whoever was available that week.
The result: inconsistent quality, coordination failures, and variations you never agreed to.
What to ask:
- Do you employ your own trades or subcontract?
- Who is the site supervisor and how often are they on site?
- Will I have one consistent point of contact throughout the project?
At Acron Projects , every trade is managed directly by our licensed project managers. No strangers on your site.
Question 5: What Is the Realistic Timeline?
An unrealistic timeline is a red flag, not a feature.
Builders who promise aggressive timelines to win jobs often create scheduling conflicts, rushed work, and defects that surface months after handover.
- What is the start date and practical completion date in writing?
- What are the key milestones and payment schedule?
- What happens if the timeline slips — is there a liquidated damages clause?
Question 6: How Do You Handle Variations?
Variations are where renovation budgets go to die. Every change to scope after work starts generates a cost — often at a premium rate.
What to ask:
- How are variations priced?
- Do I need to approve every variation in writing before work proceeds?
- What has caused variations on your last three projects?
A builder who can’t answer the last question clearly hasn’t been tracking them.
Question 7: What Does the Defects and Warranty Process Look Like?
Under NSW Home Building Act 1989, structural defects must be rectified for 6 years and non-structural defects for 2 years. But the legal minimum is not the same as responsive service.
What to ask:
- What is your process for reporting and resolving defects?
- Do you conduct a formal post-handover inspection?
- How quickly do you respond to defect claims?
