Tree root mapping is a targeted investigation used to identify the location, depth, size and distribution of significant tree roots where construction or excavation is proposed close to a tree. It provides site-specific evidence about the actual root system rather than relying only on calculated Tree Protection Zones.
TreeScope Consulting provides tree root mapping and tree root analysis across Sydney for Development Applications, driveways, retaining walls, building works, footings, underground services and other construction proposed within or near a tree’s Tree Protection Zone (TPZ) or Structural Root Zone (SRZ).
Root investigations are carried out using appropriate non-destructive excavation methods, such as careful hand excavation or air/vacuum excavation where suitable. Exposed roots are documented and assessed by an AQF Level 5 Consulting Arborist to determine their size, location and significance, and to evaluate the likely impact of the proposed works.
The findings can then be used to support an Arboricultural Impact Assessment, assist with design modifications, locate footings or structures more appropriately, and provide evidence to council where further investigation of development impacts is required. Our assessments are undertaken with reference to AS 4970:2025 – Protection of Trees on Development Sites and relevant local council requirements.
Tree root mapping may be required where proposed development or excavation is located close to an existing tree and the likely impact on roots cannot be determined from plans and calculated protection zones alone.
Common situations include:
Root mapping can provide evidence about the actual location and size of roots before finalising construction details. This can help determine whether proposed works should be modified, whether tree-sensitive construction methods are required, or whether the development can proceed while retaining the tree.
Tree root mapping is usually completed using non-destructive investigation methods so roots can be located and assessed while minimising damage to the tree.
Depending on the site and the purpose of the investigation, methods may include:
The investigation area is selected to answer a specific development question, such as whether important roots are present beneath a proposed driveway, footing, retaining wall or excavation zone.
Once exposed, significant roots are assessed by the consulting arborist in relation to the proposed works, the tree’s TPZ and SRZ, and the likely impact on tree health and stability.
A tree root mapping report documents the findings of the root investigation and explains how those findings relate to the proposed development or construction works.
A typical report may include:
Where root mapping forms part of a broader development assessment, the findings can also be incorporated into or used to support an Arboricultural Impact Assessment.
Tree root mapping is particularly useful where proposed works are close to established trees and the location of significant roots could affect the design or construction method.
Common examples include:
By exposing and documenting roots before construction begins, the project team can make more informed decisions about where structures, footings or excavation should be located.
Where significant roots are identified, the findings may support design changes, alternative construction methods, increased clearance from the tree, or arborist supervision during construction.
The purpose is to reduce unnecessary root damage while giving the project team clearer evidence about what can realistically be built near the tree.
In some cases, yes. Tree root mapping can provide evidence that helps determine whether a tree can be retained while nearby development proceeds.
Rather than assuming roots are present throughout the entire Tree Protection Zone, targeted investigation can show where significant roots are actually located and whether the proposed works are likely to affect them.
Where the investigation identifies suitable areas with fewer or less significant roots, the project design may sometimes be adjusted to reduce impacts. This can include relocating footings, modifying excavation lines, changing construction methods or increasing clearance from the tree.
Root mapping does not guarantee that development will be approved or that a tree can always be retained. However, it can give the arborist, designer and council better site-specific information to support a more informed decision.
TreeScope Consulting provides tree root investigations and reporting by an AQF Level 5 Consulting Arborist with experience in development assessment, tree protection and construction near retained trees.
Our role is to interpret the root investigation in the context of the tree’s condition, the proposed works, TPZ and SRZ requirements, and the likely impact on tree health and stability.
We assist homeowners, architects, builders, developers and project managers with root mapping for Development Applications, driveway design, retaining walls, excavation, service installation and construction planning across Sydney.
Where required, the findings can also inform an Arboricultural Impact Assessment, project arborist recommendations or council submissions.
TreeScope Consulting provides independent arboricultural advice focused on practical solutions for development and construction near trees. Our tree root mapping work is carried out to answer specific site questions and provide clear evidence that can assist with design, council requirements and tree retention decisions.
We provide:
Our reports are written to be clear, site-specific and useful to property owners, architects, builders, engineers and councils.
Tree root mapping may be required where proposed works are close to an existing tree and the likely impact on significant roots cannot be confirmed from plans alone. Council or the project arborist may request further root investigation before the development design is finalised.
Root mapping is generally completed using non-destructive investigation methods such as careful hand excavation, air excavation or vacuum excavation where appropriate. The aim is to expose and document significant roots while minimising damage to the tree.
The report can document the location, depth and approximate diameter of exposed roots, the investigation area, photographs, TPZ/SRZ context, likely development impacts and recommendations for design or construction.
It can provide useful site-specific evidence about where significant roots are located and whether proposed works are likely to affect them. The findings may support design changes or tree-sensitive construction methods, but they do not guarantee development approval.
No. Root mapping usually involves direct investigation of roots using non-destructive excavation methods. Ground-penetrating radar may sometimes assist with locating areas for further investigation, but it should not be relied upon alone to confirm significant root locations.
TreeScope Consulting provides AQF Level 5 tree root mapping and root investigation for Development Applications, driveways, retaining walls, excavation and construction near trees across Sydney. Contact us to discuss your site and report requirements.
