Getting an indication of the cost to build your new home is a daunting prospect.

Initially, architectural designers, architects & builders, provide an estimate based on the proposed plan floor area.

Here is an example (180m² floor area) of these Guesstimate Build costs:-

Economical Specification: $1700/m² x 180m² = $306,000

Medium Specification: $2000~$2500/m² x 180m² = $360,000~$450,000

High Specification: $3000~$5000+/m² x 180m² = $540,000~$900,000+

Source:-      http://www.buildingguide.co.nz/resources-regulations/budget-calculator/