A house that works with the WA climate, not against it.

No sweltering January afternoons. No freezing 6am starts. No panicked power bill in February. A Leanhaus Passivhaus is designed so your home does the hard work quietly, in the background, leaving you with a house that just feels right, all year round.

What "Passivhaus" actually means

Passivhaus (or Passive House) isn't a style, it's a performance standard. Instead of relying on a bigger air conditioner or a thicker jacket, a Passivhaus is built as a tightly sealed, superbly insulated envelope and mechanically ventilated building envelope that holds onto comfortable temperatures naturally. The result: a home that stays warm in winter and cool in summer using a fraction of the energy a typical home needs.

A building envelope that does the heavy lifting.

Continuous insulation and airtight construction mean no more hot spots, cold corners, or draughts creeping under doors - every room holds its temperature evenly.

Power bills that make sense.

All-electric services paired with a genuinely efficient building mean lower running costs, not just lower emissions - and it's ready for solar and battery storage from day one, so you can go further whenever you're ready.

Built for how you'll actually live.

EV charging provision is built in from the start, not retrofitted awkwardly later - because we design for the next ten years, not just the day you move in.

Certified, or just built to the standard?

Some of our clients want their home formally certified by the Passive House Institute — an independent, third-party verification that your home performs exactly as designed. Others are happy building to the same rigorous standard without the certification process and cost. We'll talk you through what each option actually involves, and help you decide what's right for your project and budget.

See it, don't just read about it

Numbers on a page are one thing. Living in one is another. [See how a Leanhaus performs in the middle of a Perth heatwave →]

Curious whether Passivhaus is right for your project? Let's talk it through. [Book a consultation →]

The technical part…

 Passivhaus Design Optimisation

• Passivhaus design optimised in house (Design PH and PHPP)

• Highly efficient building envelope to minimise unwanted heat gains and losses.

• Solar Passive Design and Passive Cooling design strategies to maximise comfort.

• Airtight and thermal bridge free construction.

Limit upfront embodied carbon

• We greatly reduce or eliminate the requirement for carbon intensive structural concrete and steel

• Low carbon timber and renewable materials preferred.

• Materials sourced locally where possible

• Design to reduce waste through careful selection of products for module size optimisation

Consider whole of life carbon

• Cradle to grave philosophy considers impacts at each stage of a product's life-cycle.

• Preference for timeless style and quality materials to ensure long life that will not require premature disposal and renewal.

• Preference for materials that require minimal on-going maintenance. We avoid applied external finishes that require constant renewal.

• We prefer composite structures can be readily dismantled and re-used at end of life.

• Our homes have been certified to show up to 92% carbon reduction against benchmarks.

Reduced Operational Energy Demand and Consumption

• Highly efficient building envelope requires less energy to maintain a comfortable internal environment.

• Highly energy efficient services and appliances such as Heat Pump Hot Water and Induction Cooking.

Eliminate Fossil Fuels

• Electric only services provision.

• No need for natural gas connections to the home.

Provide on site renewables and storage

• Solar Power with provision for future household battery storage.

• Provision for Electric Vehicle charging.

• On site rainwater storage available

Certify and Disclose against reputable standards

• Option to certify Lifecycle Carbon costs.

• Option for Passive House Certification.