The Zimmermann Oz

Built with integrity. Shaped by heritage. Focused on the future. The Zimmermann Oz is a Passive House builder delivering architecturally refined, energy-efficient homes across Melbourne and Brisbane. Every project is shaped by craftsmanship, transparency, and care, from the initial conversation to the final finish. Founded by Jan Knecht, a German-trained carpenter, TZO combines European building discipline with Australian expertise. We follow Passive House principles — airtightness, high-performance insulation, smart ventilation, and thermal control — to create homes that are healthier, more comfortable, and up to 90% more energy-efficient. Our work spans custom new builds, high-performance renovations, and our exclusive TZO Homes range — pre-designed homes that balance cost efficiency with Passive House performance. Every home we build is carbon neutral certified, with emissions offset through GreenFleet, and backed by a structural warranty of up to 20 years. Why build with TZO?+ Passive House precision — certified, detail-driven builds that perform for the long term + Design and performance, aligned — beauty and efficiency in every element + Full-service project management with clear, fixed-price quoting + Sustainability focused — low-carbon materials, waste reduction, and emissions offsetting We build homes that feel good to live in, today and for decades to come.