The Best Questions To Ask A Builder Before You Sign
Most buyers don't know what they don't know. This list gives you the questions that separate a good builder experience from an expensive one.
Signing a building contract is one of the biggest financial decisions most people make. Yet most buyers walk into the process with fewer questions prepared than they'd bring to a used car lot. The builder's sales team are skilled at managing conversations toward a positive outcome — your job is to ask the questions that reveal the gaps.
This guide isn't a theoretical checklist — it's the questions that actually matter, grouped by what you're trying to find out, and explained so you know why each one is worth asking.
Tip
Questions About Inclusions and Price
"Can you show me exactly what's included in this price?"
Why ask this?
The base price rarely reflects what you see in the display. You need the full inclusions list in writing — not a summary brochure.
"Which items in the display home are upgrades?"
Why ask this?
Display homes are fitted out to sell upgrades. A builder's team should be willing to mark up the display with 'standard' and 'upgrade' labels. If they're hesitant, that's a red flag.
"What does your standard benchtop, flooring, and kitchen package include?"
Why ask this?
These three categories are where buyers most commonly get surprised. Knowing the exact spec upfront helps you budget realistically.
"Are there any provisional sums or prime cost items in this quote?"
Why ask this?
PC and PS items are budget estimates, not fixed prices. They can increase after contract signing. Ask what they cover and what's realistic.
"What is not included in this price that I'll need to organise after handover?"
Why ask this?
Driveways, fencing, landscaping, blinds, and security screens are common exclusions. You need a complete picture to budget properly.
Questions About Site Costs
"What site cost allowance is in this quote, and what happens if it's exceeded?"
Why ask this?
Site cost allowances are estimates. On challenging blocks they can blow out significantly. Know what the allowance is and your exposure if it's exceeded.
"When will you have accurate site costs for my block?"
Why ask this?
Site costs are finalised after a soil test and site inspection — which often happens after you've signed a preliminary agreement. Understand the timeline.
"Has anyone from your company inspected the block?"
Why ask this?
A builder quoting purely off a map or lot number is giving you a much rougher estimate than one who has visited the site.
Questions About Build Process and Timeline
"What is the realistic build time from slab pour to handover?"
Why ask this?
Ask about slab pour to handover — not contract signing to handover, which includes pre-construction delays. Understand what's normal and what causes delays.
"Who is my dedicated supervisor and how often will they be on site?"
Why ask this?
Site supervision quality varies hugely between builders. A good supervisor catches problems early; an absent one doesn't.
"How do you communicate with clients during the build?"
Why ask this?
Some builders use customer portals, others email, some barely communicate at all. Know what to expect before you commit.
"What happens if the build runs over time?"
Why ask this?
Some contracts have liquidated damages clauses for delays; others don't. Know your contractual position.
Questions About Warranty and After-Sales
"What warranties do you offer beyond the statutory minimums?"
Why ask this?
State-mandated warranties are the floor, not the ceiling. Ask what additional warranties the builder provides on structural elements, waterproofing, and workmanship.
"How do you handle defects identified at the pre-handover inspection?"
Why ask this?
The pre-handover inspection is your last chance to identify problems before they become post-handover disputes. Ask about the process and typical response times.
"Can I speak with customers who've built with you in the last 12–18 months?"
Why ask this?
The best indication of a builder's reliability is their recent customer experience. Builder-curated testimonials tell you very little — real conversations tell you a lot.
Questions About Contract and Legal
"What are the conditions under which the contract price can change?"
Why ask this?
Even 'fixed price' contracts can change. Know exactly what circumstances allow the builder to vary the price.
"What is your cooling-off period and preliminary agreement process?"
Why ask this?
Most builders use a preliminary agreement before the main contract. Understand what you're committing to at each stage and what fees apply if you withdraw.
"Do you use a Master Builders or HIA standard contract?"
Why ask this?
Reputable volume builders use industry-standard contracts. Bespoke contracts heavily favouring the builder are a warning sign.
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Red Flags to Watch For
Beyond the answers to specific questions, pay attention to how the conversation goes. Watch for:
- !Reluctance to provide the full inclusions list before you sign a preliminary agreement
- !Vague answers about what the site cost allowance covers
- !Pressure to sign quickly because of 'pricing expiry' or 'limited blocks available'
- !Display home staff who can't tell you which items are upgrades
- !Inability to provide recent customer references
- !Contract language that is significantly different from industry-standard HIA or Master Builders forms
- !No clear answer about who your site supervisor will be
Watch Out
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