Buying guide
House extensions: Everything you need to know
Read this before you break ground
AI summary
Considering a house extension? Costs range from $50k+ for a bedroom to over $400k, influenced by project size, materials, and site conditions.
The process involves an architect for design, securing finance, and obtaining council consents before construction. Choosing a builder and signing a detailed contract is vital. Always plan for a 15% contingency for delays and budget for the future. A final Code Compliance Certificate (CCC) from the council officially completes your project.
How much does a house extension cost?
Rough guide to NZ house extension costs
What affects the cost of house extensions?
Extent of extensions
Materials used
Your site’s conditions
Council consents
In most cases you'll need to get consent before extending your property.
The NZ house extension process
It's a good idea to get a clear idea of costs before you start a project
If you can do some work yourself you could save thousands of daollrs.
Hot tips for building an extension
The contract is key
Think about your neighbours
Prioritise consents
Demand cost and timeline certainty but plan for blow outs
Build for the future
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