What Town Planners Need From an Arborist Report in Melbourne

Town planners working on Melbourne planning applications deal with arborist reports regularly, but the relationship between the planning framework and the arboricultural documentation is not always as clean as it should be. Reports arrive that do not address the right planning controls, that use terminology inconsistently, or that make recommendations without clearly connecting them to the specific overlay or clause that triggered the requirement in the first place. The result is avoidable delays, requests for additional information, and applications that take longer to resolve than they need to.

This article is written for town planners who want to understand what a well-prepared arborist report should contain, how to identify documentation that will hold up under council scrutiny, and how engaging the right arboricultural consultant early in the process makes the planning application stronger from the outset.

Why the Arborist Report Is a Critical Planning Document

An arborist report is not simply a technical tree assessment. In the context of a Melbourne planning application, it is a piece of evidence that needs to respond directly to the planning controls applicable to the site. A report that accurately describes the trees but fails to engage with the specific overlay requirements, the Clause 52.37 provisions, or the council's local policy on canopy retention is a report that generates queries, delays, and requests for additional documentation.

Town planners are well positioned to identify this problem early, because they understand what council officers are looking for and what a responsible authority will scrutinise when assessing an application. An arborist report that a town planner can read and confirm is responsive to the planning framework is a document that is far less likely to generate an RFI or a referral for independent review.

What a Properly Structured Arborist Report Contains

A compliant arborist report prepared to Australian Standard AS 4970 for a Melbourne planning application contains several components that town planners should be checking before an application is lodged. The report should clearly identify every tree within the zone of influence of the proposed development, including trees on neighbouring properties where their canopy or root systems extend onto or near the subject site.

For each tree, the report should document the species, trunk diameter at breast height, estimated canopy spread, height, structural condition, and a significance rating that reflects the planning weight the tree carries under the applicable overlay or local policy. The tree protection zone for each significant tree should be calculated from the trunk diameter measurement and shown on a site plan overlay that maps directly against the architectural drawings.

The report should then address how the proposed development interacts with each tree protection zone, identify any encroachments, and either justify those encroachments with specific arboricultural reasoning or recommend design modifications that avoid them. Vague statements about general care near trees are not sufficient. Council officers need specific, measurable recommendations that can be translated into enforceable permit conditions.

Our tree reports and arborist assessments are structured to respond to the planning framework from the outset, which is why town planners who engage us early find the documentation integrates cleanly with the planning application rather than requiring revision after it is prepared.

How Planning Overlays Shape the Arboricultural Requirements

One of the most common sources of misalignment between arborist reports and planning applications is a failure to properly account for the overlay or local policy that triggered the arboricultural requirement. Different overlays impose different thresholds and different documentation expectations, and an arborist report that does not clearly identify which overlay applies and how the assessment responds to it is not fully useful to a town planner preparing the application.

Vegetation Protection Overlays, Significant Landscape Overlays, and the Neighbourhood Character Overlay each carry different implications for tree retention obligations. The 2025/26 Victorian Planning Reforms updated the Clause 52.37 provisions in ways that have practical consequences for how development near significant trees is assessed across most Melbourne municipalities. A report prepared without reference to the current planning framework is a liability, not an asset, in an application.

Town planners should confirm with the arboricultural consultant at the time of engagement which overlays and clauses apply to the site and how the report will address them. An experienced consultant will be asking those questions themselves before the site visit is conducted. Our council arboricultural services include a review of the applicable planning controls before any assessment is undertaken, because the planning framework shapes everything about how the report needs to be structured.

The Problem With Reports That Are Not Independent

Town planners assessing which arboricultural consultant to recommend or engage should pay close attention to the independence of the consultant. A report prepared by a consultant who also provides tree removal or pruning services carries a structural conflict of interest, regardless of whether that conflict ever influenced the specific findings. Council officers and independent referral assessors are experienced in identifying reports where the recommendations appear to align with a commercial interest rather than with the evidence.

An independent consultant, one with no commercial interest in the removal, pruning, or maintenance outcome, is in a fundamentally stronger position to provide the kind of objective, evidence-based assessment that planning applications require. This independence also matters at VCAT if a matter is contested. Reports prepared by genuinely independent consultants are considerably more difficult to challenge than those prepared by contractors with a financial stake in the outcome.

Arborplan operates solely as an arboricultural consultancy. We do not carry out tree removal, pruning, or any other maintenance works. Town planners who engage us can present our reports to council with confidence that the independence of the assessment is not a point of vulnerability in the application.

What Town Planners Should Expect at the Pre-Application Stage

The most productive way for a town planner to engage arboricultural advice is before the design is finalised, not after the application is ready to lodge. A pre-application arboricultural assessment gives the design team the tree protection zone data and significance ratings they need to design around tree constraints from the outset, which reduces the likelihood of late-stage design changes and strengthens the planning application before it is prepared.

At the pre-application stage, the arboricultural consultant can also advise on whether a standard arborist report will meet the threshold for the application, or whether a more detailed arborologist report is warranted given the significance of the trees involved and the complexity of the proposed development. Making that determination early avoids the situation where a council officer requests additional documentation after the application has already been assessed.

Where subsurface data is needed to support the application, commissioning a non-destructive root investigation at the pre-application stage gives the design team accurate root architecture data before footing layouts, service routes, and driveway alignments are finalised.

Supporting the Application Through Assessment and Beyond

A town planner's relationship with an arboricultural consultant does not end when the report is submitted. If council issues an RFI relating to the arborist report, the consultant needs to respond promptly and with sufficient technical detail to close out the query rather than generating further questions. Where a matter progresses to VCAT, the consultant may be required to give evidence and be questioned on the methodology and findings of the report.

Choosing a consultant who is experienced in the full planning lifecycle, from pre-application advice through to RFI responses, permit condition negotiation, and if necessary VCAT evidence, means the arboricultural component of the application is managed consistently from start to finish rather than handed off between different practitioners at different stages.

Arborplan works with town planners across Melbourne on residential, commercial, and multi-dwelling planning applications where arboricultural documentation is required. We prepare reports structured around the planning framework applicable to each site, and we engage with council and referral authorities directly where queries arise during the assessment process.

If you are a town planner working on a Melbourne application with significant trees on or near the site, contact us at the earliest stage of the project to discuss what the planning controls require and how we can support the application.