Frequently asked questions (FAQ)
Q. What is circulation?
A. Circulation refers to hallways, entrances and stairways. Use 10% for a basic no-frills house. Use 20% - 25% if you want your house to feel spacious.
Q. How accurate is your construction cost calculator?
A. Our construction cost calculator is only an initial estimation tool. Only use it before you start drawing up plans.
Experienced builders who have used our calculator for initial estimates have told
us they can get to within 10% of the final cost. So it is important to do your research - the better your research the more accurate your results.
Read our article about Building Cost Estimates for more detailed information.
It includes a section explaining how and where to get Costing Data.
Q. How will my non-standard features such as high ceilings affect the cost?
A. Hard to say. The best you can do before detailed house plans are drawn up is increase the per-square-metre rates
used by the calculator.
The calculator has an option called 'Quality of finish' which allows you to select 'basic', 'standard' or 'luxury'. Selecting standard
increases the per-square-metre rate by $300. Selection 'luxury' increases the rate by $600.
iPhone version of calculator
Builders Buddy is an iPhone construction cost estimator & calculator for new houses, renovations & additions. Builders Buddy gives a preliminary estimate of building costs. It is only suitable for use before any detailed plans are made.