Questions To Ask A Home Builder Before Signing

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15 questions to ask a home builder before you sign anything

Signing a building contract is one of the biggest financial decisions most Australians ever make, yet most people sign after 2 or 3 casual conversations. These are the 15 questions BuildPilot advises every buyer to ask, in order, before signing anything.

Last updated 28 February 2026 · Editorial guide, not financial advice

The 15 questions in order

  1. What is the exact base price, and what is NOT included? The gap between "from" price and true delivered price is often $40,000 – $120,000.
  2. Can you show me your fully-costed inclusions list? If they can't show it in writing on the spot, walk.
  3. What are your provisional sums and prime cost items, and how often do those blow out? Ask for real examples from their last 5 completed builds.
  4. What is your realistic timeline from contract signing to handover? Not the marketing timeline - the average of their last 10 builds.
  5. Can I speak to your last 3 customers directly? A confident builder says yes without hesitating.
  6. Are you a fixed-price or cost-plus contract? Insist on fixed-price for your first build.
  7. What is your process for variations? How are they costed, approved, and invoiced?
  8. What does your defects list process look like in the 90 days after handover?
  9. What structural warranty and builder's indemnity insurance do you carry?
  10. Who is my day-to-day contact once we sign? Sales agents disappear after contract. You need to know your site supervisor by name.
  11. How many builds do you have running simultaneously? Over-stretched builders miss timelines.
  12. What happens if you go into liquidation mid-build? HIA indemnity should cover it - confirm the policy.
  13. Have you built on my specific block? Sloping, tight-access, character-overlay, hills sites are different beasts.
  14. What is your policy on inspection access? A good builder welcomes independent stage inspections.
  15. Would you build this house for a family member at this price? Watch the eye contact.

Red flags in a builder's answers

  • "We do not usually share that in writing" - always demand it in writing.
  • "Provisional sums always come in at what we quoted" - almost never true.
  • "Our timeline is X months guaranteed" without qualifications - unrealistic.
  • "We do not need independent inspections" - a confident builder welcomes them.
  • Refusing to give you 3 references from recent customers.
  • Pressure to sign on the same day, or a discount that "disappears tomorrow".

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