Zanetto Builders
Eco & Sustainable Home Builders Tasmania
We build eco homes across Tasmania — low-energy, durable and light on the planet, without asking you to compromise on comfort or design.
An eco home is one that uses far less energy to run, is built from durable, responsibly chosen materials, and is designed to last for generations rather than decades. Zanetto Builders builds sustainable Tasmanian homes on high-performance building science — orientation, insulation, airtightness and efficient services — including certified Passivhaus homes that use roughly 80–90% less heating energy than a typical build.
A genuinely eco home isn't about a token feature bolted onto a standard house. It's a home designed as a whole system to use less — less heating and cooling energy, less maintenance, less waste over its life — while staying beautiful and comfortable to live in.
We start with the fundamentals that deliver the biggest environmental return: orientation and passive solar design, a continuous well-insulated and airtight envelope, high-performance glazing, and efficient services. Get those right and the home needs a fraction of the energy — and often only a modest solar array — to run comfortably all year.
How we build an eco home
Passive design first
Orientation, glazing and shading are tuned to the site so the home captures winter sun and rejects summer heat — cutting energy demand before a single appliance is switched on.
A high-performance envelope
Continuous insulation, airtightness and thermally-broken detailing dramatically reduce the energy needed to stay warm and comfortable — the single biggest lever for a low-footprint home.
Efficient, electric-ready services
Efficient heating, hot water and ventilation, designed to pair with solar and run cleanly, so operating emissions fall as the grid gets greener.
Durable, considered materials
Materials chosen to last and to age well, because the most sustainable home is one that doesn't need replacing, reworking or repairing for generations.
Sustainability that actually performs
The greenest thing a home can do is need very little energy in the first place — and that comes from the building fabric, not the gadgets. Our homes are designed so the demand is low by construction, which is why they stay comfortable through a Tasmanian winter on a fraction of the energy.
It's also about the long term. A durable, well-detailed home that manages moisture and lasts for generations avoids the enormous embodied-carbon cost of premature repairs and rebuilds. Building it once, and building it properly, is the most sustainable choice there is.
At the top end, our certified Passivhaus homes prove it in hard numbers — one achieved a heating demand of just 10 kWh/m²·yr, independently certified.
Learn more about Passivhaus.
Why Zanetto Builders
Low-footprint homes are high-performance homes, and performance is our craft. With the largest certified Passive House team in Tasmania, we bring genuine building science — not green marketing — to every eco home, so it uses less, lasts longer and stays a joy to live in.
Where we build
Locations we service
Frequently asked questions
Eco & Sustainable Home Builders Tasmania — your questions answered
What makes a home eco-friendly?+
A truly eco home is designed to use very little energy through passive solar design, a high-performance insulated and airtight envelope, and efficient services — then built from durable materials so it lasts. The biggest environmental gains come from the building fabric reducing demand, not from add-on features.
Do eco homes cost more to build?+
Typically a modest amount more, mostly in the building envelope and glazing. That's returned through much lower running costs, greater durability and comfort. Because the home needs so little energy, the ongoing savings compound every year you live there.
Are your eco homes all-electric?+
We design homes to run efficiently and to pair with solar, so they can be all-electric and get cleaner as the grid decarbonises. The priority is always to minimise the energy needed first, then meet that low demand as efficiently and cleanly as possible.
What's the difference between an eco home and a Passivhaus?+
Eco is the goal; Passivhaus is the most rigorous, independently certified way to reach it. Every eco home we build uses the same principles — passive design, a high-performance envelope, efficient services — and certified Passivhaus is the verified top tier of that approach.
Do I need solar panels for an eco home?+
Solar helps, but it works best once the home barely needs energy to begin with. We reduce demand through the building fabric first, so a smaller, more affordable array can cover much more of what the home actually uses.
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