Quantified risk rating per tree
Each assessed specimen receives a numerical risk of harm, benchmarked against accepted thresholds.
Legally defensible risk evaluation for institutions
QTRA Risk Assessments
Quantified Tree Risk Assessment is the internationally recognised, evidence-based methodology for managing tree risk. Essential for schools, hospitals, councils, and institutions balancing liability with the preservation of valuable tree assets.
QTRA CertifiedOverview
QTRA replaces subjective judgement with a quantified, probability-based rating. It weighs the size of the part that could fail, the likelihood of failure, and the value of the target beneath — producing a risk figure that can be compared, budgeted, and defended.
As a QTRA-registered practice, we apply the method across high-occupancy grounds where duty of care must be documented rather than assumed.
What you receive
Target & occupancy analysis
Usage patterns of paths, buildings, playgrounds, and roads factored directly into the calculation.
Prioritised action schedule
Clear sequencing of what must be actioned now, what can be scheduled, and what only needs monitoring.
Reinspection framework
Defined intervals and triggers so your risk register stays current between formal assessments.
Suited to
When this service applies
- Schools, universities, and childcare grounds
- Hospitals and aged-care facilities
- Council parks, reserves, and streetscapes
- Insurers and property managers documenting liability
Accredited & Assured
Independently accredited, industry recognised
Where we work
Level 5 consulting across NSW
Based on the Central Coast, we deliver arboricultural reports throughout Greater Sydney, Newcastle, and the Blue Mountains — with no travel charges inside our service areas.
Explore service areas
Central Coast
Newcastle & Lake Macquarie
Sydney Metropolitan
Blue Mountains
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