You have ordered the building and pest inspection. It will tell you about the roof, the stumps, the wiring and the termites. It will tell you nothing at all about the 25-metre flooded gum leaning over the bedroom, and that is not an oversight by your inspector — it is the standard doing exactly what it says.
What AS 4349.1 excludes
Standard pre-purchase building inspections in Australia are carried out to AS 4349.1-2007 Inspection of buildings — Pre-purchase inspections: Residential buildings. Appendix D of that standard lists items excluded from inspection. Item (y) is “Landscaping”.
Clause 3.2.1 sets the geographic scope at relevant features within 30 metres of the building — but the features contemplated are built ones: car accommodation, paths, driveways, fencing, retaining walls and surface water drainage. Trees are not in the list.
Your building inspector is not permitted to have missed the tree. Assessing it was never inside the scope you paid for. If you want to know about the trees, that is a separate engagement.
Why it matters more in the Sunshine Coast hinterland
Blocks in Buderim, Montville, Maleny, Cooroy, Eumundi and the Noosa hinterland routinely come with retained mature natives — flooded gum, forest red gum, brush box, tallowwood, hoop pine — that predate the house by decades. Three things follow:
- The trees are large enough to destroy the building. A 28-metre Eucalyptus grandis is not a landscaping feature; it is a structural risk with a probability attached.
- Many are protected. Local vegetation protection and koala habitat provisions mean you may not be able to remove what you find, and a removal application without a quantified assessment is a weak application.
- Remediation is expensive and it is yours from settlement. A single large removal with traffic management and crane access can run into five figures.
What a pre-purchase tree assessment tells you that the building report cannot
- Whether anything is currently unacceptable. A quantified risk of harm above 1/1,000 means action is indicated now — that is a settlement-period conversation, not a year-three surprise.
- What it will cost to hold. The works schedule over the next one, five and ten years, so you can price the property with the trees in it.
- What you will not be allowed to remove. Protected status checked before you exchange, not after you have plans drawn.
- Whether the tree is a bargaining position. An unacceptable risk identified before contract is a number you can negotiate against. Identified after settlement, it is just your bill.
The insurance dimension
Policies commonly respond to sudden damage from a falling tree. They respond less willingly where the insurer can show the condition was pre-existing, observable, and unaddressed. A dated pre-purchase assessment establishes what was known and when — and if works were recommended and carried out, it establishes that you acted. That is a materially better position than discovering the tree's history through a claim.
Timing
The useful window is the same as the building and pest window: after contract, during the inspection period, while you still have a right to act on what is found. It is a small addition to a process you are already running, and it covers the one asset on the block that can flatten the thing you are buying.