Non-Destructive Root Assessment for DA, CDC & Construction
Our AQF Level 5 Arborists provide non-destructive tree root investigation and mapping across the Central Coast Council area, supporting development, construction and infrastructure works where tree roots may be impacted.
We regularly undertake root investigations in Gosford, Tuggerah, Berkeley Vale, Erina and Wyong, where driveways, footings, services or excavation works are proposed near retained trees and Tree Protection Zones (TPZs) require detailed assessment.
Root investigations are frequently required in suburbs such as Blackwall, Pearl Beach and Patonga, where constrained sites, sloping terrain and proximity to retained canopy trees commonly necessitate detailed root mapping to support compliant design and Council assessment.
What Is a Tree Root Investigation?
A tree root investigation is a detailed arboricultural assessment used to locate and assess tree roots below ground, determine root distribution and condition, identify conflicts with proposed works, and support design refinement and Council assessment.
Investigations are undertaken using non-destructive methods wherever possible to minimise impact on tree health.
When Is Root Investigation Required?
Root investigation is typically required where:
- Building works encroach into a Tree Protection Zone (TPZ)
- Footings, slabs or piers are proposed near retained trees
- Driveways or services pass close to tree trunks
- Council or certifier requests further arborist evidence
- Design flexibility is required to retain trees
Root Investigation Methods
- Targeted hand excavation
- Air-spade or air-knife investigation
- Visual and dimensional root assessment
- Mapping of root location and depth
- Integration with architectural or engineering drawings
Root Mapping & Reporting
Each root investigation includes:
- Identification of significant structural roots
- Root location and depth mapping
- Assessment of potential construction impacts
- Recommendations for design modification or protection
- Clear Council-ready arborist documentation prepared in accordance with AS 4970
How Root Investigation Supports DA Approval
- Reduce unnecessary tree removals
- Allow alternative footing or construction solutions
- Resolve Council concerns during assessment
- Support compliance with TPZ and SRZ requirements
- Prevent costly redesigns or approval delays
Why Engage an AQF Level 5 Arborist
- AQF Level 5 Arborist qualifications
- 32+ years’ professional experience
- Extensive DA and construction interface expertise
- Clear understanding of Council expectations
- Defensible, evidence-based recommendations
Frequently Asked Questions
Is root investigation always required for DA approval?
No. It is often requested where works encroach into TPZs or Council requires further evidence.
Are root investigations non-destructive?
Yes. Methods are selected to minimise disturbance while providing accurate information.
Will Council accept root investigation reports?
Yes. Reports prepared by AQF Level 5 Arborists and aligned with AS 4970 are accepted.
Can root mapping change my building design?
Yes. Mapping often allows design refinement to retain trees and avoid approval delays.
Request a Tree Root Investigation Report
Council-compliant tree root investigation and mapping reports prepared by Level 5 Arborists, supporting DA approvals, engineering design and construction compliance across the Central Coast. Contact us today.
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Call now or email us for fast, expert help with your tree permit or report. Rest easy, we handle everything from start to finish.
