Cost & finance
What does a modular rooftop home cost in Australia?
6 min read · Updated August 2026
Short answer
An 80m² modular rooftop home in Australia starts from about $349,000 for the delivered module, with a realistic all-in range of $320,000 to $450,000+ once crane access, services connections and finishes are settled. Approvals, professional fees and structural strengthening are additional and quoted per building.
Rooftop projects price differently from conventional construction because most of the build happens in a factory. The module cost is comparatively predictable; the site-specific costs are where projects diverge.
What is in the module price
- Structural chassis, envelope, glazing and waterproofing.
- Full internal fit-out: kitchen, bathroom, joinery, flooring, fixtures.
- Electrical, hydraulic and mechanical rough-in and fit-off.
- Factory quality assurance and pre-delivery commissioning.
What sits outside it
- Crane hire, traffic management and road-occupancy permits — highly site dependent.
- Structural strengthening if the engineer's assessment requires it.
- New roof membrane, drainage and flashings.
- Service upgrades: water pressure, switchboard capacity, fire systems, lift extension.
- Planning, survey, engineering, certification and strata legal fees.
How the numbers usually land
For a straightforward Sydney building with clear street access, total delivered cost commonly sits in the mid-$300,000s to mid-$400,000s per 80m² home. Constrained sites — narrow streets, overhead wires, long crane radius, heritage overlays — push that higher. Against that, a completed rooftop lot with a terrace and views in an established inner suburb frequently values well above the delivered cost, which is what makes the model work for owners corporations.
Every figure above is indicative and subject to site conditions, design and approvals. The feasibility report models your specific building rather than an average.
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