
Fixed-Price vs Cost-Plus Building Contracts in NZ
On this page The short answer Fixed-price contracts Cost-plus contracts Head-to-head comparison What to settle before comparing contracts What suits a Dunedin renovation? How variations

On this page The short answer Fixed-price contracts Cost-plus contracts Head-to-head comparison What to settle before comparing contracts What suits a Dunedin renovation? How variations

On this page What does a second-storey extension cost? Cost component breakdown Why the roof and foundations set the budget Going up versus going out

If you are weighing up a knockdown rebuild vs renovate decision in Dunedin, start with the structure, not the kitchen finishes. A renovation usually costs
A bathroom renovation in Dunedin typically costs between $15,000 and $35,000 for a standard-sized bathroom with mid-range finishes. For larger bathrooms, premium fixtures, full layout
In 2026, building a custom home in Dunedin costs between $3,200 and $6,000+ per square metre for the construction contract (GST inclusive). But that number
Building a custom home in New Zealand typically takes 12-18 months from first conversation to moving in, and costs between $3,500 and $6,000+ per square