How much does it cost to build a house per square metre in NZ?

Build rates vary widely by quality, location and design, from around $2,500 per square metre for a simple build to well over $5,000 for high specification. A per-square-metre rate is a useful early ballpark, but only a builder's quote gives a firm price.

Why add a contingency?

Builds almost always uncover surprises and changes. A contingency of around 10% to 15% on top of the base estimate gives a more realistic budget than the headline build figure alone.

Build Cost per Square Metre Calculator

This New Zealand calculator gives an early ballpark cost for a new build from a dollar-per-square-metre rate. Build rates vary widely with quality, location and design, so a per-square-metre figure is a starting point, not a quote. You enter the floor area, your build quality rate and a contingency, and the tool shows the base build cost and a more realistic budget once the contingency is added.

Floor area (m2)

Build rate per m2

Contingency

estimated build budget including contingency

Base build cost$0

Contingency$0

A ballpark for the house construction only. It usually excludes land, site works, driveways, landscaping, consents and connections, which add significantly. Build rates vary; get a builder's quote. Estimate only.

How it works

The calculator multiplies the floor area by your build rate per square metre to give a base build cost, then adds your contingency percentage for the surprises and changes that builds always bring. The result is a more realistic budget than the base figure alone. Use a higher rate for high-spec finishes, tricky sites or architectural designs, and a lower one for simple, standard builds.

Worked example

A 180 m2 home at $3,500 per square metre is a base build cost of $630,000. A 12% contingency adds about $75,600, for a build budget of around $705,600, before land, site works and consents.

Related calculators

New Build GST Calculator: GST on a build.
Home Renovation Budget Calculator: renovation budget.
Property New Build Calculator: new build numbers.
Mortgage Repayment Calculator: financing the build.

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