What to Ask a Builder Before You Sign Anything for Custom Built Homes
Signing a contract for custom built homes is one of the most significant commitments you can make. Knowing what to ask your builder first can protect your investment, your timeline, and your peace of mind.
Building a custom home in Adelaide, SA, is a major undertaking. The questions you ask before contracts are signed can determine whether your experience is smooth or stressful. From licensing requirements under SA legislation to how your builder handles unexpected changes on site, being informed from the start puts you in a far stronger position.
Why Pre-Contract Questions Matter for Custom Built Homes
Asking the right questions upfront is the single most effective thing you can do. Adelaide's building landscape has its own considerations, including soil variability across suburbs like Magill, Norwood, and the Hills, block orientation requirements for energy efficiency, and compliance with updated National Construction Code standards. A builder who answers your questions clearly and confidently is one worth trusting.
1. Are You Licensed and Insured Under SA Law?
Every builder taking on residential work valued above $12,000 in South Australia must hold a current Building Work Contractors Act 1995 (SA) licence. Ask your builder to confirm their licence number with Consumer and Business Services SA, and verify they hold public liability insurance and building indemnity insurance, which protects you if the contractor cannot complete the work or meet a claim for faulty workmanship.
Red flag: Vague answers, reluctance to provide a licence number, or an expired policy.
2. What Is Your Experience With Custom Built Homes Specifically?
A builder who specialises in custom built homes will approach design, council approvals, and site management very differently from one who primarily delivers volume builds. Ask how many custom homes they have completed, whether they have experience with your preferred architectural style, and whether you can speak with previous clients. Local experience matters too, as soil conditions vary significantly between inner suburbs and outer growth corridors.
Red flag: A builder who cannot provide references or whose portfolio is limited to project-style builds.
3. What Type of Contract Will You Provide?
Under the Building Work Contractors Act 1995 (SA), domestic building contracts come in two main forms: a fixed-price lump sum or a rise-and-fall arrangement. For custom built homes, a fixed-price contract typically offers better budget certainty. Ask your builder which type they use and why, and confirm they have a clear written process for any variations.
Red flag: A builder unwilling to provide a fixed price or who cannot explain how price variations are handled.
4. How Are Variations Managed?
Poorly managed variations can add significant cost and delay. Under SA legislation, owner-requested variations must be agreed in writing before work proceeds. A builder with a transparent variation process will provide a written quote, a timeline impact assessment, and your signature before proceeding.
Red flag: A builder who processes changes verbally or cannot show a formal variation procedure.
5. Who Will Supervise My Build Day to Day?
For custom built homes in Adelaide, SA, consistent site supervision can make the difference between a well-managed project and a frustrating one. Ask who your primary contact will be, how often you will receive updates, and whether ownership is personally involved in overseeing your project. Learn more about the team's approach on the custom built homes page.
6. Who Are Your Subcontractors and Suppliers?
Ask your builder which subcontractors they use regularly, how long those relationships have been in place, and whether they use the same trades across projects. Strong, long-term relationships with trusted local subcontractors and suppliers signal a builder who can deliver quality and manage timelines effectively.
Red flag: A builder who uses a different crew on every job or cannot name their key subcontractors.
7. What Warranties Do You Provide?
South Australian domestic building contracts carry implied statutory warranties covering workmanship and materials. Ask what warranties your builder provides beyond the statutory minimum and how defects are handled after handover. A builder confident in their work will have a clear process for post-completion issues.
Red flag: A builder who dismisses warranty questions or offers only vague verbal assurances.
8. Will My Home Meet SA Energy Efficiency Requirements?
From October 2024, all newly constructed homes in South Australia must meet a 7-star energy efficiency rating, affecting design, insulation, glazing, and orientation from the earliest planning stage. Ask your builder how they incorporate these requirements and whether they can advise on solar-ready layouts or thermally efficient materials suited to Adelaide's climate.
Red flag: A builder unfamiliar with current NCC requirements or who treats energy efficiency as an afterthought.
9. What Does the Timeline Look Like and What Can Affect It?
Ask your builder for a realistic project timeline, what factors could cause delays, and how they communicate changes. A trustworthy builder will provide a detailed programme with milestones and keep you informed throughout.
Red flag: An overly optimistic timeline with no mention of risks or contingencies.
Ready to Build? Ask the Right Team the Right Questions
The questions above can help you separate confident, experienced professionals from those who may fall short when it counts. Brianni Constructions has been delivering quality custom built homes across Adelaide for decades, with personal ownership oversight, trusted subcontractor relationships, and HIA membership on every project. To start the conversation, contact the team or call 08 8332 4994 for an obligation-free discussion about your vision. You can also explore the team's reputation across Adelaide on Brianni Constructions.
