Free Construction Cost Calculator

Having an accurate estimation of costs to build an Australian property and to help with cost planning is integral to controlling and monitoring budgets for a building project.

Given that every house has a different size, floor area and finish, it’s ideal to use our construction cost calculator as an estimate on how much it will or previously cost to build the property.

Duo Tax offers a comprehensive construction cost calculator Australia to help with gauging how much your house construction is expected to be.

Please note that this is only for indicative purposes and if you need assistance, get in touch with the team at Duo Tax so that we can help you.

Frequently Asked Questions

How do I calculate the floor area?

Our construction cost calculator is based on gross floor area. This is the total floor area that’s fully enclosed across all floor levels. This should be measured based on the external measurement of the building to account for the thickness of the walls.

What is considered fully enclosed floor area?

This includes generally enclosed floor space as well as areas such as:

  • Staircases
  • Garages
  • Attics
  • Basements
  • Lift shafts
What is considered unenclosed floor area?
  • Balconies
  • Verandahs
  • Porches and patios
  • Walkway
How accurate is your construction cost calculator?
While every effort is made to ensure data and information are up to date, the calculators are for indicative purposes only and should not be used for any purpose other than an estimation of costs. If you’d like an accurate estimation, get in touch with the Duo Tax team for a free estimate.
Who can provide an accurate estimation of the cost to build?
Quantity surveyors are qualified to provide cost reports and accurate estimations once detailed plans and data have been submitted. The calculator is designed to provide you with an estimate based on the data you provide.
Can you provide cost estimates and cost reports?
Yes, we can. We can work closely with architectural drawings to prepare elemental cost plans as well as detailed cost plans with consideration for budget and value. If you’re a home builder, we can provide effective cost planning to achieve realistic estimates.

The other benefit is that our quantity surveyors can constantly monitor your project and will help identify overspending at an early stage to be able to take prompt action.
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