Sensitivity Analysis
Property Cost Calculation
Unit Conversion:
• 1 Builder's Square = 9.290304 m² (approximately 100 sq ft)
• Total Cost = Total Area × Price per Unit
Sensitivity Range: ±10% of base price
Note: Builder's squares are commonly used in Australian construction. The calculator automatically converts between metric and builder's squares for convenience.
Related Resources
Property Cost Calculator Australia — Estimate Construction Costs
Estimate the total cost to build on your property including construction, site preparation, council fees, and contingencies. Designed for Australian residential builds.
Frequently Asked Questions
How much does it cost to build a house in Australia in 2026?
Average build costs in 2026: $1,800-2,500 per square metre for a standard home, $2,500-4,000/m² for custom builds, and $4,000+ for luxury/architect-designed homes. A standard 200m² home costs approximately $360,000-500,000 to build.
What costs are not included in a builder’s quote?
Typically excluded: land cost, stamp duty, legal fees, council application fees ($2,000-10,000), soil testing ($500-1,500), surveying ($1,000-3,000), landscaping, driveways, fencing, and window furnishings. These can add 15-25% on top of the build price.
How much contingency should I budget for building?
Budget 10-15% contingency for a new build on a standard site. For renovations or sites with unknown conditions (rock, contamination, heritage), budget 15-20%. This covers variations, price rises, and unforeseen issues.
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