Everyone wants the number. Fair enough. But if you are hoping it is the same price as a standard build with a few extra insulation batts, it is not. A certified Passive House is high-end architecture built to a verified performance standard. The honest answer is more nuanced than a single figure, and understanding why will change how you think about your budget entirely.

Every certified Passive House Carland Constructions has built performs at a level that would make most Melbourne homes look embarrassing. But one of our projects sits noticeably higher on the heating demand chart than the others. Some people see that number and assume something went wrong. Nothing went wrong. That higher number is the most honest thing on the page.

The industry is currently obsessed with theoretical stars. A 7-star energy rating assumes your insulation is perfect and your building envelope is tight. In reality, without a Blower Door Test, those stars are just a guess.

Most builders walk away from a site without ever knowing if the air control layer actually works. At Carland Constructions, we do not guess. We verify the building physics of every project so our clients know they are getting the performance they paid for.

The most common question we get is: How much more does a Passive House cost? The answer depends entirely on what you are comparing it to. If you are looking at a bare-bones volume build, there is a premium. But if you are comparing it to high-end custom architecture, a Certified Passive House usually sits at the exact same price point.

Most builders think they can hit 7-star energy codes by just stuffing more glass wool into the walls. In reality, thick insulation in a leaky building is a thermodynamic failure. It is effectively a conductive resistor being bypassed by convective heat loss.

We have analysed the data from three of our key Melbourne projects: Forrest, Champion, and Pigeon. While they share a similar scientific DNA, their unique site conditions and component selections show exactly how building physics works in the real world.

If you have been watching the news lately, mould fever is hitting Australia hard. Homeowners are terrified of sick building syndrome, and for good reason. For decades, we accepted the leaky tent as the Australian standard. But as the building code changes, we are heading toward a much more dangerous reality.

To the dictionary, sustainability is the ability to be maintained at a certain level. In construction, that definition has been twisted into a marketing shield. Most builders use it to hide behind a few solar panels while building a glorified tent.

Achieving the full Certified Passive House standard on a renovation is a major undertaking, but it is possible through the EnerPHit standard. This specialised retrofit focuses on re-engineering the building envelope—specifically airtightness, high-performance windows, and continuous insulation—to reduce energy demand by up to 90% in existing Melbourne homes.

In the Melbourne building industry, we are facing a massive performance gap. Builders are churning out 7-star homes that actually perform like 2-star tents because they leak air, breed mould, and ignore the laws of building physics.

Pigeon Passivhaus (Yarraville) is the fix. It is a Certified Passive House Plus—a title held by only a handful of homes in Australia. It does not just save energy; it produces it. It does not just house people; it protects them.

There is a massive disconnect between what is on paper and what is actually built. Local audits suggest an energy performance gap where as-built homes can use up to 2.5 times more energy than the design predicted.

Building a sustainable home can feel like a minefield with so many buzzwords and conflicting ideas. It's hard to know what truly makes a home healthy, comfortable, and efficient. At Carland Constructions, we believe in a simple, science-backed approach. So, if you're looking to build a genuinely sustainable home in Melbourne, here are our top 10 tips.

Building a high-performance home is an investment in your future, but the "misinformation trap" often makes it difficult to understand where your money is actually going. To clear the air, let's look at the real-world differences between a Standard Custom Home and a Passive House, based on a typical 180sqm build.

Who needs hydronic heating in a slab when you can just insulate it correctly? It might sound like we're being cheeky, but when it comes to creating a truly comfortable and energy-efficient home, the ground is the first thing we should think about.

At Carland Constructions, we believe a home should be a sanctuary, a place of comfort, health, and durability. Yet, many homes in Australia fall short, leading to discomfort and high energy bills. We can categorise Australian homes into five different levels of performance, from the '80% house' to a 'certified passive house'.

You hear it all the time. Passive houses are for european homes.

Energy efficiency has inadvertently made window condensation more common by creating homes that are too airtight. Older homes were "leaky" by modern standards, with countless small gaps and cracks that allowed for constant, natural airflow. This continuous air exchange meant that moisture produced by daily activities like cooking and showering could escape easily, preventing humidity from building up to levels that would cause condensation.

It feels like everyone in the building industry is obsessed with the traditional tender process. Why do builders and clients still rely on a method that's clearly outdated? We think it's time to talk about a better way of doing things (we have actually been talking about this for 10 years). The traditional tender process is a bit like a blind date; you get a fancy drawing and a budget, but you have no idea if the person on the other end is a good fit. This process often pits builders against each other, with everyone racing to the bottom on price just to win the job. You might think you're getting a good deal, but you could end up paying for it later with poor-quality work or unforeseen issues. If you’re looking to build a Passive House in Melbourne, this process just won’t work.

Let's be blunt: the Australian building industry is in a mess, and it's a mess we've created ourselves. We have changed the way we build homes without understanding the fundamental physics that govern them. This has led to a building crisis where many of our homes are rotting and full of mould, and we're acting surprised when the outcome was entirely predictable.

You can build the most energy-efficient Passive House imaginable, but if you don't properly manage water and ventilation, you've built a home that is destined to fail. The reality is simple: water kills buildings. Proper water management and controlled ventilation are the non-negotiable foundations of any durable, healthy, and comfortable home.