What Are Tree Reports and Why Do You Need One?

If you’ve been told you need a Tree Report or Arborist Report before starting a project, you might be wondering: What exactly is a tree report—and why is it so important? Whether you’re a homeowner applying for council approval, a developer planning a build, or someone concerned about a large tree on your property, understanding tree reports is essential.

In this post, we’ll break down what tree reports are, when they’re required, and why they’re more than just a box to tick on your permit application.

From safety to compliance to environmental care—tree reports offer insights you can’t afford to skip.

Quick Overview: Why Tree Reports Matter

Tree reports (also called Arborist Reports) are professional assessments of trees prepared by qualified arborists. They evaluate a tree’s health, structure, risk, and value, often in the context of proposed development or removal.

Here’s what you need to know at a glance:

• Tree reports are required by councils for developments or when seeking permission to prune or remove protected trees.

• Qualified arborists conduct these reports using standard assessment methods like VTA (Visual Tree Assessment).

• The report can impact approval decisions, construction plans, and safety measures.

• Failing to submit a proper tree report can delay permits—or even lead to legal issues if a tree is removed without consent.

Want to dive deeper? Keep reading for key insights, practical tips, and common pitfalls to avoid.

What Is a Tree Report?

A tree report is a formal document written by a qualified arborist that provides detailed information about one or more trees on a property. It typically includes:

• Species identification

• Tree size, age, and condition

• Health and structural integrity

• Recommendations for retention, pruning, or removal

• Impact assessment on nearby development

• Root zone protection zones (TPZs)

• Photographic evidence and diagrams

Tree reports are often submitted as part of development applications, tree removal requests, or risk assessments—and are vital for both compliance and planning.

When Do You Need a Tree Report?

You may need an arborist report in any of the following situations:

Development Applications

Most Australian councils require a tree report before approving construction or renovation projects near significant trees.

Tree Removal Requests

Want to remove a large or protected tree? You'll likely need an arborist’s formal assessment to justify its removal.

Safety or Risk Concerns

If a tree appears unstable, diseased, or potentially hazardous, a report can help identify the risk and recommend action.

Subdividing Land

When planning subdivision, councils often require a tree impact assessment to determine which trees can be retained.

Why Tree Reports Are More Than Just Paperwork

Tree reports protect people, property, and the environment. Here’s why they matter:

• Legal compliance: Avoid hefty fines by ensuring tree removal or modification meets local regulations.

• Property safety: Discover hidden hazards before they become liabilities (like root damage or falling limbs).

• Development planning: Prevent costly redesigns by identifying which trees must be retained and how to protect them during construction.

• Tree health management: Get expert advice on how to care for mature trees or deal with disease and decay.

Did You Know?
Many local councils classify trees based on size, species, and significance. You might need a report even if the tree is in poor condition.

Quick Guide: Planning to Build Near a Tree? Here’s What Happens

Situation:

You’re planning an extension and there’s a mature gum tree right on the edge of the property line. You’re not sure if you can build around it—or whether you’ll need to remove it altogether.

Common Challenges:

• Can I legally remove the tree?

• Will the roots damage my new foundation?

• What if council rejects my plan because of the tree?

How to Solve It:

1. Get an Arborist Assessment Early: Before you finalise designs, book an arborist to assess the tree’s health, root spread, and canopy size.

2. Include the Tree Protection Zone (TPZ): Your report should define a TPZ that shows where machinery or excavation must be limited.

3. Prepare a Tree Impact Assessment (TIA): If construction will affect the tree, this part of the report outlines how to minimise damage and retain the tree if possible.

4. Submit With DA or Council Application: Attach the report to your development application—it shows due diligence and helps smooth the approval process.

Why It Works:

By having an official arborist report upfront, you show the council that you’re prioritising tree protection. It reduces the chance of costly delays or redesigns.

Need a tree report for your upcoming project? It’s worth getting it done early—before any concrete is poured.

What Should a Good Arborist Report Include?

Not all tree reports are created equal. A professional report should include:

• Clear identification of all trees assessed

• Photographs and site plans

• Risk rating (using tools like QTRA or TRAQ)

• Specific recommendations for management, pruning, or removal

• Compliance with AS 4970-2009 (Protection of Trees on Development Sites)

Pro Tip: Always ask if the arborist holds a minimum AQF Level 5 qualification—this is usually required by councils.

FAQs About Tree and Arborist Reports

Q1: How much does a tree report cost in Australia?

A basic arborist report typically costs between $300–$800 depending on the number of trees, site complexity, and urgency. Complex assessments (like risk reports or DA reports) may cost more.

Q2: Can I write my own tree report?

No. Most councils require reports from a qualified arborist (AQF Level 5). DIY reports are not accepted for official purposes.

Q3: What’s the difference between a tree report and a risk assessment?

A tree report includes general health and development considerations, while a risk assessment specifically addresses safety and failure likelihood—often using formal methods like QTRA.

Q4: Do I need council approval to remove a tree even on private land?

Yes—many trees are protected under local environmental plans. A report helps justify your request and proves it's necessary.

Q5: How long is an arborist report valid for?

Most councils consider a report valid for 6–12 months, depending on the situation. Always check if your report is still current before resubmitting it.

Conclusion: A Tree Report Isn’t Just a Formality

When it comes to property, safety, and compliance, a tree report is one of the most valuable tools you can have. It helps you:

• Avoid costly council delays

• Protect trees worth saving

• Identify dangerous ones

• Ensure your development stays on track

Whether you’re removing a tree, building a granny flat, or simply managing risks—an arborist report offers clarity in an area full of grey zones. And when done early, it can save you thousands.

Need a qualified tree report for your property? Start with a trusted arborist and make your next move a confident one.