New Zealand · Free cost calculator
Get an online estimate
Choose a project type, answer a short sequence of questions and see an indicative New Zealand cost range on screen. It is planning guidance, not a binding quote.
Start here
What kind of project are you starting?
Choose the closest match. We’ll ask about scope, budget and location, then show a planning range on screen.
- Custom homeNew build, design & build, or major new dwellingContinue
- RenovationRefresh or remodel all or part of an existing homeContinue
- Extension / additionExtra space — ground floor, second storey, garage, sleepoutContinue
- KitchenCabinetry, layout, bench, splashback, open-planContinue
- BathroomOne room, ensuite, laundry, or multiple wet areasContinue
- Decking & outdoorTimber or composite deck, pergola, stairs, outdoor livingContinue
- Something elseCommercial, multi-unit, or a project that does not fit the categories aboveContinue
Free
No cost, no obligation
Indicative
A planning range, not a quote
Private
Your project is not broadcast
Estimate methodology
A planning model, not a quote.
Bracen's rule-based model starts with a project-type baseline, then applies the scope, approximate size, finish level and New Zealand region supplied in your answers. The displayed range is 10 percent either side of the calculated midpoint. A budget you enter is compared separately and does not set the result.
Site access, ground conditions, design detail, engineering, council requirements, selections, exclusions and market availability can move a real price materially. The model was last reviewed in September 2026 and is maintained as Bracen editorial guidance, not an official price index or quantity-surveyor assessment.
For wider assumptions and regional context, read the New Zealand cost-to-build guide.