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Yarraan Environmental

Our Services

Specialist Arboricultural Consulting Services

From Arboricultural Impact Assessments to QTRA risk evaluations, we deliver Level 5 consulting reports that councils, developers, and institutions across NSW rely on for defensible tree decisions.

Our Capabilities

Five specialist services. One trusted consultant.

Each engagement is delivered personally by our Level 5 arborist — independent, insured, and answerable only to the technical standards that make our reports defensible.

01AS4970-2009
Mandatory documentation for Development Applications

Arboricultural Impact Assessment (AIA) Reports

When construction affects trees, councils require an AIA. Our Level 5 reports calculate Tree Protection Zones per AS4970-2009 and provide clear retention recommendations that planning authorities respect and approve.

What's included
  • AS4970-2009 compliant Tree Protection Zones
  • Structural Root Zone calculations
  • Retention & removal recommendations
  • Council-ready technical documentation
Read more about Arboricultural Impact Assessment (AIA) Reports
02QTRA Certified
Legally defensible risk evaluation for institutions

QTRA Risk Assessments

Quantified Tree Risk Assessment is the internationally recognised, evidence-based methodology for managing tree risk. Essential for schools, hospitals, councils, and institutions balancing liability with the preservation of valuable tree assets.

What's included
  • Internationally recognised QTRA methodology
  • Mathematically defensible risk ratings
  • Duty-of-care documentation
  • Prioritised action recommendations
Read more about QTRA Risk Assessments
03Council Approved
Accelerate planning approvals with expert assessment

Development Application Reports

Expert tree assessments structured specifically for planning submissions. We evaluate tree significance, calculate development impacts, and provide practical mitigation strategies that streamline the DA process from lodgement to consent.

What's included
  • Tree significance evaluation
  • Development impact analysis
  • Mitigation & offset strategies
  • Supplementary submission support
Read more about Development Application Reports
04VTA Methodology
Advanced diagnostics for heritage & declining specimens

Tree Health & Vitality Analysis

Detailed diagnostic assessments for heritage trees and mature specimens showing signs of decline. Combining visual tree assessment with advanced techniques to produce clear treatment protocols and ongoing monitoring plans.

What's included
  • Visual Tree Assessment (VTA)
  • Vitality & structural analysis
  • Targeted treatment protocols
  • Long-term monitoring plans
Read more about Tree Health & Vitality Analysis
05Portfolio Scale
Systematic evaluation of extensive tree populations

Large-Scale Property Assessments

Comprehensive inventories and staged management plans for institutional grounds, golf courses, holiday parks, and estates. Every significant tree documented, assessed, and prioritised within a cohesive long-term strategy.

What's included
  • Full tree inventory & mapping
  • Individual specimen assessments
  • Staged management planning
  • Budget & resource forecasting
Read more about Large-Scale Property Assessments

Not sure which service fits your project? Send us the details and we'll recommend the right assessment pathway — no obligation.

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Our Consulting Process

From consultation to reporting, we follow a structured approach that ensures accurate tree assessments, clear recommendations, and full compliance with regulatory requirements.

  1. 1. Initial Consultation

    We discuss your requirements, compliance  obligations and timeline, reviewing plans to identify tree impacts and risk management needs.

  2. 2. Site Assessment

    Our Level 5 arborist conducts a thorough field evaluation, documenting findings with detailed photography and measurements per AS4970-2009.

  3. 3. Report Preparation

    We prepare comprehensive documentation with executive summaries, technical analysis andclear recommendations for council or institutional review.

  4. 4. Ongoing Support

    Report delivery with opportunity for clarification, plus continued support through the DA process including council meetings and follow-up.

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Where we work

Level 5 consulting across NSW

Based on the Central Coast, we deliver arboricultural reports throughout Greater Sydney, Newcastle, and the Blue Mountains — with no travel charges inside our service areas.

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Central Coast landscape

Central Coast

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