Plain practical advice for Australian builds. No fluff.
Base price vs final contract price
The advertised base price is rarely what you pay. Most volume builders quote a base house and land package or a base build price that excludes site costs, council fees, landscaping, fencing, driveways, window coverings, letterbox, clothesline, air conditioning, floor coverings upgrades and sometimes even basic items like door handles or downlights. Read the inclusions list line by line. Ask for a detailed estimate of likely site costs (soil tests, slab or stumps, retaining, services connection, tree removal). Request a provisional sum allowance or fixed quote for items listed as PC (prime cost) or provisional. The gap between base price and final contract can easily be $50,000 to $100,000 or more depending on your site and selections. Get everything in writing before you sign.
Inclusions checklist and specifications
Create a spreadsheet to compare what each builder includes as standard. Check tap and fixture brands, appliance models, floor coverings (carpet grade, tile size and brand), benchtop material (laminate, stone, reconstituted), window and door brands, insulation ratings (ceiling and wall batts), electrical inclusions (number of downlights, power points, TV points, data points), heating and cooling (ducted, split system, none), and external finishes (render, brick, cladding type). Also compare structural specs: slab thickness, timber or steel frame, roof pitch, eaves width, wall height (2.4m, 2.55m, 2.7m), and compliance with NCC energy efficiency (six star minimum, but some builders offer seven star or better). If one builder is cheaper but uses lower grade materials or fewer inclusions, that is not a true saving.
Builder licensing and credentials
Every residential builder in Australia must hold a current builder's licence or registration in the state or territory where they operate. In South Australia, check the CBS (Consumer and Business Services) licence register. In Victoria, check the VBA (Victorian Building Authority). In NSW, check the NSW Fair Trading register. In Queensland, check the QBCC. Verify the licence is current, not suspended, and covers residential building work. Also check if the builder is a member of the Housing Industry Association (HIA) or Master Builders Association (MBA). Membership is not mandatory but indicates the builder meets certain standards and has access to dispute resolution. Ask how long the builder has been operating under the current business name and ABN. New builders are not necessarily bad, but established builders have a track record you can verify.
Warranties and insurance
Australian law requires builders to provide statutory warranties (also called statutory guarantees) covering defects in materials and workmanship, structural defects, and compliance with building codes. The duration varies by state: typically six years for major structural defects and two years for non-structural defects in most states. Builders must also arrange building warranty insurance (called Home Warranty Insurance in NSW, Domestic Building Insurance in Victoria, Home Owners Warranty in Queensland, and CBUS in South Australia). This insurance protects you if the builder dies, disappears or becomes insolvent before completing the job or fixing defects. Ask to see proof of insurance before signing. For contracts over certain thresholds (varies by state, often $12,000 to $20,000), the builder must provide a certificate of insurance. If a builder cannot or will not provide this, walk away.
Contract terms and payment schedule
Read the contract carefully. In most states, you have a cooling-off period (five business days in many states) after signing. Check the payment schedule: it should be stage-based (deposit, base stage, frame stage, lockup, fixing, practical completion) and tied to actual work completed, not arbitrary dates. Avoid paying large deposits (10 per cent is typical, more than that is a red flag). The contract should clearly state the scope of work, plans and specifications, start and finish dates, and process for variations. Understand what happens if there are delays (extension of time clauses, liquidated damages). Make sure the contract is either an HIA or MBA standard contract, or has been reviewed by a solicitor experienced in building law. Do not sign a contract where the builder has heavily amended the standard terms in their favour.
References and past work
Ask each builder for at least three recent client references, ideally from the last 12 months and similar in scope to your project. Call those clients and ask about communication, quality of workmanship, how variations were handled, whether the job finished on time and on budget, and if they would use the builder again. Also ask if you can inspect the completed home in person. Walk through display homes but remember these are often built to a higher spec than standard builds. Look for online reviews on Google, ProductReview, and Facebook, but be aware that very small samples or very old reviews may not reflect current performance. Check with your state consumer affairs or fair trading body for any formal complaints or disciplinary action against the builder.
Red flags to watch for
Be wary if a builder pressures you to sign quickly, offers a deal that is much cheaper than competitors without clear reason, asks for large upfront deposits or cash payments, cannot provide proof of licence or insurance, has no written contract or uses a homemade contract, refuses to provide references, has a history of name changes or new ABNs (possible phoenix activity), or is vague about inclusions and exclusions. Other red flags include poor communication during the quoting phase (if they are hard to reach now, it will be worse during the build), no fixed price (cost-plus contracts are higher risk for homeowners), and a reputation for pursuing variations and extras aggressively. Trust your instincts. If something feels off, get a second opinion or walk away.
Communication and project management
A good builder will assign you a dedicated contract administrator or site supervisor, provide regular progress updates, and be responsive to questions and concerns. Ask how often you will receive updates, whether you will have access to an online portal or app to track progress, and who your main point of contact will be. Ask what their process is for managing variations, how they handle defects or snags, and what happens if there is a dispute. Builders who are transparent, organised and easy to communicate with during the quote and contract phase are more likely to be the same during construction. Builders who are slow to respond, vague or defensive when questioned are a warning sign.
