Passive House Builders in Melbourne.

Certified, carbon neutral homes — built for performance through every Melbourne season.


Build with integrity. Live better.

  • At The Zimmermann Oz (TZO), we’ve been building Passive House-aligned homes in Melbourne for over 10 years. From winter cold snaps to summer heatwaves, our builds deliver thermal stability, cleaner indoor air, and long-term efficiency, without compromise.

  • Whether it’s a new build or a high-performance renovation, we use airtight detailing, smart ventilation, and low-carbon materials to create homes that quietly hold their own in a shifting climate.

  • We work across custom new builds, renovations, and our exclusive TZO Homes — a curated collection of pre-designed homes that balance cost-efficiency with certified performance.

Why Passive House

Passive House is a global building standard for performance, comfort, and health. It goes beyond minimum compliance, focusing on airtightness, insulation, heat recovery, and solar orientation to reduce energy use by up to 90%. At TZO, every home we build aligns with these principles. For clients wanting third-party verification and financial benefits, we also offer full Passive House certification.

What We Offer in Melbourne:

  • Custom Passive House-aligned new builds

  • TZO Homes – our exclusive pre-designed, Passive House-aligned home range

  • Certified Passive House delivery

  • Renovations with thermal upgrades

  • All builds are carbon neutral, with emissions fully offset through GreenFleet

Aintree. Passive Certified.

From the outset, this home was designed for minimal impact and maximum performance. The clients were informed, committed, and clear on their values — and we worked closely with them to align every detail.

We delivered full Passive House certification using a highly considered material palette: ECO Pact low-carbon concrete, Surefoot micro-pile footings, timber framing, Earthwool insulation, and a complete airtight membrane. A Zehnder HRV system provides mechanical ventilation, while recycled UPVC triple-glazed windows support thermal stability and reduce embodied carbon.