The views expressed here are based on our personal observations and interpretations.
Readers should treat this as our subjective viewpoint and not rely on it as professional advice.
A house can meet code and still make your family sick. Here's why compliance is the floor, not the finish line, and what you can do about it before you sign.
Your home is the place your kids sleep and your family breathes the air for decades. When a builder cuts corners, picks the barely compliant option or ignores well-known building science, the result isn't just a cosmetic fault. Mould, condensation and poor moisture management affect indoor air quality, comfort and health. Yet most homeowners have been taught that if a house "meets code", it must be good enough. Often it isn't.
Questions to ask your builder before you sign
This is the most useful part of this post, so I've put it first. Before you sign, ask your builder:
- Can I see your quality management plan? A builder serious about quality has a written process for checking work at each stage, not just the certifier's inspections.
- Who inspects the work at each stage, and can I see the signed inspection records? Ask for their Inspection and Test Plans (ITPs) or stage checklists.
- Has a condensation risk assessment been done for this design? Particularly for lightweight-clad walls and skillion or raked ceilings.
- How do you manage moisture in the walls and roof? Ask about the wall wrap, whether there's a drained cavity behind the cladding, and how the roof space is ventilated.
- Where do the bathroom, laundry and kitchen exhaust fans discharge? They should go outside, not into the roof space.
- How is the insulation installed and checked? Gaps and compressed batts can wreck the performance on paper.
- Will you allow an independent inspector on site at each stage? If the answer is no, ask why.
- Who are the directors, and what building experience do they have?
If a builder can't show you concrete measures for quality and occupant health, it may be time to look elsewhere. The Asking the Right Questions checklist has more.
What compliance does and doesn't cover
Building codes and standards set the legal floor for construction, not the ceiling. The National Construction Code (NCC) and Australian Standards are there to make a home safe and structurally sound, with minimum energy efficiency. That's important, but it isn't the same as a home that stays dry, comfortable and healthy for 50 years.
In Queensland, the checks on a new house look robust on paper. The engineer designs the footings and slab, and the building certifier (or a competent person they rely on) inspects at the mandatory stages: footings and excavation, slab before the pour, the frame, and the final. At the end, the certifier issues a final inspection certificate (Form 21) for the house.
But what does "meeting code" really mean for living in the place? Those inspections are snapshots. They focus on structure and minimum compliance. Most of the decisions that decide whether a home performs well remain at the builder's discretion:
- how moisture is managed in the walls and roof
- how carefully insulation is installed
- how the home is ventilated and how airtight it is
- how wet areas are detailed
A frame can pass its inspection while the wall it becomes is set up to trap moisture. NCC 2022 did add some condensation management requirements for houses, such as the vapour permeance of wall wraps and exhaust fans discharging outdoors. It still doesn't require a project-specific condensation risk analysis, and the certifier isn't checking whether your bedroom walls will be mouldy in ten years.
Compliance in that sense is a minimum, not a guarantee of long-term performance.
Anthony Painter
The certifier problem
One of the systemic flaws is who hires and pays the certifier. On most new homes it's the builder, not the homeowner. Many certifiers keep their professional integrity, but their ongoing work depends on the builder's continued business. That creates a subtle pressure to go easy. Calling out borderline practices can be seen as adversarial, and nobody wants to lose a client.
The result is a process that is officially independent but structurally inclined to favour the builder. That's why I keep telling homeowners to arrange their own independent stage inspections. True accountability needs someone on site who isn't paid by the builder.
Anthony Painter
Sizzle instead of steak
It's easy to be won over by "more for less" marketing: stone benchtops, designer tapware, a kitchen straight out of a magazine. Project builders lead with these features because they sell. But there's always a cost to be paid, so where are you paying for it?
Sales pitches almost never mention how the walls manage moisture or whether the design reduces thermal bridging. Buyers end up prioritising finishes, which encourages builders to spend money on what you can see rather than on what keeps the house healthy.
Value engineering
"Value engineering" sounds positive. On a house it often means cost-cutting: cheaper materials, thinner insulation, simpler moisture management. These changes may not break the code, but they set up comfort and maintenance problems down the road. What looks like a great deal at signing can turn into a long-term liability. The builder keeps the margin. You pay in comfort, energy bills, health and resale value.
A big brand isn't a quality guarantee
Many large builders share the same pool of subcontractors, buy similar materials and build to the same minimum standards. Display homes show their best work, not the median build. Consumers rarely ask to see quality management plans, third-party inspection results or evidence of building science in the design. That knowledge gap is exactly what the sales process relies on.
Anthony Painter
Industry association logos
Industry associations present their membership as a mark of professionalism. Look closely at the criteria, though. Membership mostly needs a current licence and a fee. There's no ongoing audit of the quality of members' homes, no requirement to show a working quality management system, and no published performance data.
Their main value is a seat at the table in policy and regulatory discussions. That may be useful for the industry, but it doesn't translate into guaranteed quality for you. Ask any builder how their association enforces quality among members, and what that means for your home.
It doesn't help that the Australian Standards your home is built to sit behind a paywall, so most homeowners can't read them.
Anthony Painter
Who is making the calls?
We picture trades, designers and engineers working towards a good home. But in many building companies the decisions are made by directors and executives with backgrounds in sales, finance or marketing rather than building. Many are good at running a business. Fewer understand moisture management, thermal bridging or why a detail matters.
When the people making the calls have never run a site, cost and speed tend to win every argument.
Executive pay is usually tied to sales targets and margins, not to how the homes perform five years after handover. So the question in the boardroom becomes "How do we cut $5,000 off the build cost for a promotion?" rather than "How do we build a home that stays dry and efficient for decades?" Ignoring known risks such as condensation isn't just an oversight. It's a failure of the duty of care a builder owes its customers.
Before you sign, look up the company's directors. Ask what building experience they have and how their methods differ from competitors on moisture management and indoor air quality. Builders run by people with real building knowledge often deliver better homes.
Owner-building as an alternative
Owner-building puts you in charge of the standards, the materials and the trades. You can write a strict specification, book independent inspections at every stage and refuse shortcuts.
It's not a silver bullet. It takes time, money and patience, and a willingness to learn construction methods and the regulations. Mistakes made through inexperience can be costly. Lenders are more cautious with owner-builder loans, and insurance is more complicated. In Queensland you also need an owner-builder permit from the QBCC for work over $11,000.
Still, just having the option gives you leverage. In a fair market you wouldn't need to build your own home to get quality. Until the industry changes its incentives, it remains a real alternative for people with the time and determination.
What would actually change things
- Independent stage inspections that aren't paid for by the builder.
- Executive incentives tied to independent quality audits and long-term defect rates, not just sales and margins.
- Industry associations that audit members' work and publish the results.
- Building science training from the boardroom to the trades.
- Informed buyers. If enough buyers start asking the questions above, builders will have to answer them.
The bottom line
Don't settle for bare compliance. A shiny kitchen doesn't stop mould in the walls. Ask for detailed answers, get independent checks and insist on a home built for durability and health. The builders who are doing it properly will be happy to show you how.
Further reading
Project Builders: From Building Companies to MarketersExplore the evolution of project builders from traditional construction companies to marketing-focused entities, offering standardised building products.
Ventilation and Airtightness: Improve Comfort and EfficiencyAchieving a comfortable, healthy home requires balancing ventilation and air tightness. In this article we explore practical methods to improve both. Learn how to prevent air leaks, reduce condensation, and improve your homeās efficiency.
Wall Wrap Installation: Adhering to Australian StandardsLearn the right way to install wall wrap according to Australian Standards. This guide explains the proper sequence for installing windows, doors, and wall wrap, highlighting the importance of correct installation for maintaining the building envelope and enhancing your homeās energy efficiency.
