Our certified Passive House at Blackmans Bay, Bluebush, was named HIA Australian GreenSmart Home of the Year 2026 at the 2026 HIA Australian GreenSmart Awards — the national program’s highest honour (see the awards).
Confused about star ratings? We’ve explained what a 7-star energy rating means in Tasmania — and what it doesn’t, including why a modelled rating is the floor for performance, not the ceiling.
What makes a home genuinely energy efficient?
Energy efficiency isn’t a product you bolt on — it’s a system you design in. The biggest gains come from the parts you never see: a continuous, well-insulated building envelope, airtight detailing that stops draughts and heat loss, high-performance glazing, and orientation that works with Tasmania’s sun instead of against it. Get those right and the home stays warm in winter and cool in summer while asking far less of its heating.
That’s the same building science behind our Passive House work — we simply apply it at every level, whether or not a project pursues full certification.
What energy efficiency actually saves you
The headline is comfort, but the number is the running cost. A properly sealed, well-insulated home needs a fraction of the heating a standard Tasmanian build does — our certified Passive House at Blackmans Bay, Bluebush, runs on roughly 80–90% less heating energy than a conventional home. In a climate where heating is the biggest line on the power bill, that compounds every winter for the life of the home.
If you want to see what that looks like against your own usage, put your figures through our Passive House savings calculator.
Energy efficient, custom, and built for Tasmania
Every energy-efficient home we build is still a one-off custom home — the performance framework never dictates the architecture. We build across Tasmania, from Launceston and the North to Hobart and the East Coast, through the same open-book Forever Home Process.
If you want a home that costs less to run and feels better to live in, start your application and we’ll show you what’s possible on your site.
Zanetto Builders holds Tasmanian building licence CC7565 and is a member of Master Builders Tasmania, the HIA and the Australian Passive House Association — a team recognised with 26 state and national building awards, including the 2026 HIA Australian GreenSmart Home of the Year. To get started, request your 48-hour feasibility.







