Wondering whether your home is worth renovating at all? Our honest guide to knock-down rebuild in Tasmania compares renovating, rebuilding and moving — so you commit to the right project, not just the first one.
Should you renovate or knock down and rebuild?
It’s the first honest question, and the answer isn’t always the one that keeps us busiest. Some homes are worth keeping — good bones, a heritage frontage, a floor plan that only needs reworking. Others cost more to fix than to replace, and pouring a renovation budget into a house that will never perform is the expensive mistake. We’ll tell you which one you’ve got before you spend on design, through the same 48-hour feasibility that prices a new build — a figure within 10% of the real cost, early.
Where a renovation is the right call, it’s delivered the same way we deliver a custom home: open-book, two quotes from each trade, every line visible, with a net profit we target at 10% and publish. Renovation work carries more unknowns than a new build — you don’t know what’s behind a wall until it’s open — so that transparency matters more here, not less. The full cost picture is in our guide to the cost to build in Tasmania.
Can an older Tasmanian home actually be warm?
Yes — and this is where a performance renovation earns its keep. A heritage or older home upgrade is more than new joinery over the same cold, damp problem. Most Tasmanian homes are cold for reasons we’ve written up in why Tasmanian homes are cold and damp, and a thermal retrofit fixes the cause: continuous insulation, better glazing, sealing the leaks, and adding controlled ventilation so the home breathes without bleeding heat.
Done well, a retrofit borrows the Passive House fundamentals that make our new homes quiet, dry and cheap to run, and applies them to a house that’s stood for a century — keeping the character, losing the cold. It’s the same energy-efficient building science, worked into an existing structure.
Home extensions: adding on without wrecking what’s there
An extension is the hardest kind of renovation to do well, because it has to solve two problems at once — the new space has to work, and the join has to disappear.
Most extensions fail at the join. The new part is warm, sealed and modern; the old part is not, and the junction between them becomes the coldest, leakiest line in the house. Adding a beautiful new living room to a cold old home often makes the contrast worse rather than better, because now you have somewhere warm to compare the rest of it to.
We treat an extension as a whole-house question. That usually means extending the insulation and airtightness layer back into the existing structure at least as far as the nearest sensible break, upgrading glazing on the elevations that matter, and putting ventilation in so the new sealed volume doesn’t trap moisture. It costs more than bolting a room on the back. It is also the difference between an extension that improves the house and one that just enlarges it.
Common Tasmanian extension projects we take on: opening up rear living areas to north light, adding a second storey to a compact inner-city block, replacing a failing lean-to with proper structure, and converting under-house or garage space into liveable rooms.
Home renovations and extensions in Hobart and the South
We renovate and extend across Hobart and southern Tasmania — Sandy Bay, Battery Point, South and West Hobart, the eastern shore at Bellerive, Howrah and Lindisfarne, and south through Kingston, Blackmans Bay and Margate.
The South has a particular renovation profile. A large share of Hobart’s housing stock predates any meaningful insulation requirement, much of the inner city sits under heritage overlays that constrain what can change externally, and the best-located homes are frequently on steep blocks where access drives the cost of everything. All three are solvable, and all three need to be priced honestly before design rather than discovered during it.
Heritage work in particular rewards a builder who has done it. Keeping a Georgian or Federation frontage intact while rebuilding the performance behind it is a specific skill — and it is entirely achievable, because the insulation, airtightness and ventilation upgrades that matter mostly happen where nobody sees them. See how we approach the southern climate on our Hobart page, or get a real number for your project with the 48-hour feasibility.
We do the same work across the North from our Launceston base, where the Victorian and Federation stock presents the same opportunity — see building in Launceston.
Zanetto Builders holds Tasmanian building licence CC7565 and is a member of Master Builders Tasmania, the HIA and the Australian Passive House Association. Our work across Tasmania has earned 26 state and national building awards, including the 2026 HIA Australian GreenSmart Home of the Year for Bluebush. To find out whether to renovate or rebuild, start your application.
