An arborist report is a formal document prepared by a qualified arborist that assesses a tree’s health, structural condition, and any risks it may pose. Councils, insurers, and developers across Australia rely on these reports to make informed decisions about tree management.
What Is an Arborist Report?
An arborist report is a written assessment that typically includes tree species identification, a health and structural evaluation, a risk rating based on accepted methodologies, and recommendations for management such as removal, pruning, or retention. Reports are prepared in accordance with Australian Standard AS 4970 and relevant state guidelines.
Types of Arborist Reports
Visual Tree Assessment (VTA)
The most common type, a VTA involves a ground-level inspection of the tree’s trunk, canopy, and root zone. The arborist identifies defects, disease symptoms, and structural weaknesses visible from the ground. Most council applications require this level of assessment.
Detailed Risk Assessment
When a VTA identifies concerns, a more detailed assessment may involve aerial inspection, resistance drilling, sonic tomography, or root mapping. These assessments cost more but provide a comprehensive picture of the tree’s internal condition.
Development Impact Assessment
Required for development applications, this report assesses how proposed construction will affect existing trees and recommends tree protection measures. It often includes a tree protection plan with zones marked on the site plan.
How Much Does an Arborist Report Cost?
Costs range from $300 for a simple single-tree assessment to $5,000 or more for complex multi-tree development reports. Our arborist report cost guide provides detailed pricing by report type and complexity. Most homeowners seeking to remove a single tree will pay between $400 and $800 for a standard report.
When Do You Need an Arborist Report?
- Council tree removal applications: Most councils require a report for protected trees. See our guide on arborist reports for council for specific requirements.
- Development applications: Any DA near significant trees will require a tree impact assessment
- Insurance claims: After storm damage or property damage caused by a tree
- Neighbour disputes: When trees cause damage or risk to adjoining properties
- Pre-purchase property assessments: To identify potential tree-related liabilities
How to Get an Arborist Report
Look for an arborist who holds a minimum AQF Level 5 Diploma of Arboriculture for report writing. They should carry professional indemnity insurance and be familiar with your local council’s requirements. To understand what qualifications to look for, read our guide on what an arborist is and how they differ from tree loppers.
Need an arborist report? Use our free matching tool to connect with qualified arborists in your area who can prepare reports accepted by your local council and provide obligation-free quotes.