How much does a house extension cost in Australia? (2026)
A clear, plain-English guide to house extension cost in Australia: ground floor versus second storey rates, what wet areas add, approvals, and the contingency you will be glad you set aside.
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A clear, plain-English guide to house extension cost in Australia: ground floor versus second storey rates, what wet areas add, approvals, and the contingency you will be glad you set aside.
A granny flat in Australia commonly costs roughly $120,000 to $250,000 or more, depending on size, finish, and whether it is a prefab kit or a custom build on site. Here is what drives the price, and how the rules differ by state.
A clear, no-nonsense guide to what it costs to build a house in Australia in 2026: per square metre ranges by build type, realistic totals, and the site costs that quietly sit outside the base price.