In WA, I’ve found that energy efficiency can be handled in two very different ways. Some builders treat it like a compliance checkbox. Others treat it like comfort engineering, meaning the home feels better to live in and costs less to run. I first got interested in this after staying in a friend’s newer home during a hot week. Their place stayed surprisingly stable inside without blasting the air con all day, and it wasn’t because they had expensive gadgets. It was because the basics were done well.
If I were evaluating a builder’s approach to efficiency and sustainability in WA, I’d start with orientation and shading. I ask how they recommend positioning living areas and glazing, and what they do to reduce heat gain in summer. Then I drill into insulation, not just whether it’s included, but where and how it’s installed. Roof insulation quality, wall insulation continuity, and reducing gaps around penetrations can matter as much as the advertised R-value.
Next, I look at air sealing and ventilation. People talk a lot about insulation, but uncontrolled air leaks can undo the benefit. I ask whether they take steps to manage drafts around doors, windows, and exhaust penetrations. On a related note, I ask how they handle moisture and condensation risk, because a tight home still needs sensible ventilation. This is one of those topics where a builder’s confidence can be misleading, so I always ask for specifics on procedures rather than opinions.
For sustainability beyond energy, I pay attention to water-wise choices and material durability. WA conditions can be tough on finishes, so choosing products that last means fewer replacements and less waste. I also like to ask about construction waste practices, because a tidy, planned site usually wastes less by default.
Here’s a step-by-step tip I use: I make a one-page “comfort brief” listing priorities like cooler bedrooms, quieter living spaces, and lower bills. I then ask the builder to propose three design or spec changes that deliver those outcomes with the best value. The answers tell me whether they can think practically, not just sell upgrades.
During my investigation, I found homegroup.com.au/perth to be particularly useful.