Australia calculator
Roof Replacement Cost Calculator
Estimate the cost to replace your roof in Australia. Adjust the roof area (m²), pitch, number of storeys, material grade, and whether the old roof is removed to see an itemised low–high range in Australian dollars (GST inclusive) for your project.
How this calculator is built
Unit costs with sources
This model cites 4 sources across line-item unit costs, regional labor data, and tax references.
Regional labor adjustment
The state table applies local labor indexes only to labor-heavy line items.
Published methodology
The methodology page lists the formula, size drivers, labor model, and source links.
Estimate your project
Change the default inputs to match your scope. The breakdown updates by line item.
Roof Replacement Cost by state: typical ranges
Each range applies that state's labor index to the labor-share line items of the default project; materials stay at national prices. Select a state for its full local breakdown and calculator.
| State | Typical range | Labor index | Permit |
|---|---|---|---|
| Australian Capital Territory | $18,529–$25,069 | 101% | Likely |
| New South Wales | $18,617–$25,187 | 102% | Likely |
| Northern Territory | $17,805–$24,089 | 95% | Likely |
| Queensland | $17,980–$24,326 | 96% | Likely |
| South Australia | $17,849–$24,148 | 95% | Likely |
| Tasmania | $16,730–$22,634 | 85% | Likely |
| Victoria | $18,222–$24,653 | 98% | Likely |
| Western Australia | $19,429–$26,286 | 109% | Likely |
Common questions
How much does it cost to replace a roof in Australia?
ServiceTasker's 2025/2026 guide puts a standard re-roof at roughly $80–$150 per square metre for materials and installation, with a mid-grade concrete-tile or Colorbond job near $110/m² GST inclusive, so a typical 200 m² house roof lands around $22,000 — Colorbond and budget tiles fall lower, while terracotta and premium slate run well above. Use the calculator above for a range matched to your roof area, pitch, and material grade.
Does the estimate include removing the old roof?
Yes — toggle 'Remove old roof' to include tear-off and disposal. Leaving it off assumes a roof-over (new sheeting laid over the existing roof), which is cheaper but not always permitted, and tile roofs generally cannot be laid over. Homes built before the mid-1980s should also be checked for asbestos before any roof is disturbed.
Which roofing material should I choose?
Colorbond steel is the popular, lighter-weight choice; concrete tiles are the durable mid-grade standard on most Australian homes; terracotta and slate sit at the top for longevity and price. Metal suits cyclone- and bushfire-prone areas because it is non-combustible and can be cyclone-rated, while tiles handle intense inland UV well. Prices shown are GST inclusive — pick the material that suits your exposure and budget and the calculator scales the estimate accordingly.