Report guide
Tree Risk Assessment Report
A Tree Risk Assessment Report evaluates the likelihood of a tree, or part of a tree, failing and the likely consequences if it did — used to justify retention, pruning, monitoring or removal decisions, independent of any development proposal.
What a risk assessment typically includes
- A visual assessment of the whole tree — roots, trunk, scaffold limbs and canopy — for defects such as decay, cavities, cracks and deadwood.
- A structured rating of likelihood of failure and likelihood of impact, combined into an overall risk category (following methodologies such as QTRA or the ISA TRAQ framework).
- An assessment of the target(s) at risk — people, structures or vehicles — and the consequence of failure.
- Recommended actions and reinspection intervals for each tree.
When you need one
Common triggers include a tree of concern near a building, path or car park; insurance or duty-of-care requirements for property owners and councils; storm or drought stress following extreme weather; or as part of routine periodic inspections for a large tree portfolio (see Tree Inventory).
How it differs from development-focused reports
Unlike a Preliminary Arborist Report or AIA, a risk assessment isn't tied to a development proposal — it's focused purely on tree condition and the safety of people and property nearby.
Related tools and guides
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