Do I need an arborist report before lodging a DA?
You do not automatically need an arborist report for every DA. The need depends on the trees present and whether the proposed works could affect them.
An arborist assessment may be needed where, for example:
- an existing protected tree may be affected by the proposed building, driveway or excavation;
- works extend into a protected tree’s Tree Protection Zone (TPZ);
- a protected tree is proposed to be removed or significantly impacted; or
- a protected tree on a neighbouring property or public land could be affected by the works.
ACT Planning specifically advises applicants to consider whether they need “a report and tree survey by a qualified arborist” and a Tree Management Plan when existing trees may be affected.
Example: If a proposed dual occupancy is well clear of existing protected trees and their TPZs, an arborist report may not be necessary. If excavation for the dwelling or driveway extends into a protected tree’s TPZ, arborist information and a Tree Management Plan may be required.
Reference: Development Application Naming Conventions – Tree Survey and Tree Management Plan – https://www.planning.act.gov.au/applications-and-assessments/development-applications/before-you-apply/naming-conventions
Short Answer
Not always. An arborist report or tree survey is generally required where the proposed development has the potential to impact a protected tree, including a protected tree on an adjoining property or public land.
Detailed Explanation
ACT Planning's Trees and landscaping ? Existing trees guidance requires existing regulated or registered trees to be identified and consideration given to:
- impacts on existing plants and trees;
- works affecting existing trees over the relevant size;
- a report and tree survey by a qualified arborist; and
- a Tree Management Plan (TMP).
The Development Application Naming Conventions further defines a Tree Survey as one conducted by an arborist that records the relevant characteristics of trees on the development site or impacted by the development. A TMP separately identifies protected trees proposed for removal and measures required to protect retained trees.
Therefore, the requirement is impact-based rather than universal. Before lodging the DA, the site and proposed works should be checked against existing protected trees and their TPZs. Where the development could affect those trees, the appropriate arborist documentation should be prepared as part of the DA documentation rather than waiting for it to be requested during assessment.
No minimum block size does not remove the need for planning assessment.
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