Soil Test – When And Why It’s Important?

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We recommend owners obtain a soil report immediately after committing to a block, especially if no recent report exists. Reactive soils (clay, silt) can significantly dictate the necessary foundation type, and failing to test early can lead to large unexpected costs.
The soil test reveals soil classification (reactivity, stability), bearing capacity, drainage, groundwater behaviour, presence of fill, or other anomalies. This data helps structural engineers design the foundation appropriately.
Especially on reactive sites (clay, unstable fill, flood‑prone areas), the soil test is arguably the most important step before committing. It ensures the slab or raised sub-floor and foundation will perform long term.
Building Approval (also known as a Building Permit, Building Certificate, or Construction Certificate) requires this document. Your building certifier or surveyor will typically request it during the approval process.