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House Construction Cost Calculator
Build a low, base, and high construction-cost range from a local cost-per-square-metre reference and editable factors.
PrivacyProject assumptions remain in the browser.
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How to use it
- 1Enter total building area and a local contractor reference cost per square metre.
- 2Adjust floor, quality, location, complexity, fee, permit, contingency, and external-work assumptions.
- 3Review the low, base, and high range and validate it with a detailed bill of quantities.
Common uses
- — Create an early residential construction budget.
- — Stress-test changes in specification or local labour and material costs.
- — Prepare a discussion baseline before requesting contractor quotations.
Important limitations
- — The tool deliberately does not invent current city-level prices; the user supplies the local reference rate.
- — The breakdown is illustrative and does not replace drawings, structural design, quantity surveying, permits, or a contractor quotation.