Buying guide
House extensions: Everything you need to know
Read this before you break ground
AI summary
A house extension can add valuable space, but it's a complex process. Costs vary widely depending on size, materials, and site conditions, ranging from $60,000 for a basic room to $400,000+ for larger projects.
The process involves an architect, securing finance, and getting council consents before construction. A detailed contract with your builder is crucial. Always budget for a 15% contingency for unexpected costs and ensure you get a final Code Compliance Certificate (CCC).
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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