Most buyers get a building and pest inspection before purchasing. Far fewer know that a separate, more specific pre-purchase structural check exists, or when they'd actually need one.
What a Building and Pest Inspection Actually Covers
It's a broad visual check across the whole property, including pest activity like termites, general condition, and obvious defects. It's genuinely useful as a first pass, but by design it covers a lot of ground quickly, and will often flag a structural concern without diagnosing what's actually behind it.
What a Pre-Purchase Structural Assessment Adds
This goes deeper on the structural side specifically, walls, footings, roof structure, and any cracking or movement that's been flagged or that you've noticed yourself. Rather than just noting "cracking observed, recommend further investigation," it tells you whether that cracking is cosmetic, historic and stable, or something that genuinely needs addressing, and what it's likely to cost to deal with either way.
When You Actually Need Both
If your building and pest report comes back clean, you may not need anything further. If it flags a structural concern, or you've spotted something yourself during an inspection or open home, that's exactly the situation a pre-purchase structural check is for. It's a small cost against the price of the property, and considerably cheaper than finding out after settlement.