Buy the right report for the decision.
A permit report, a dangerous-tree assessment and a building-impact report answer different questions. Paying for the wrong one can leave Council, an engineer, an insurer or a buyer asking for the work again. Use this guide to specify the deliverable before the inspection.
Five reports, five different jobs.
1. Condition and risk assessment.
This records defects, targets, likelihood and consequence, then recommends pruning, monitoring, target management or removal with a timeframe. Use it for a large gum near a Pakenham house, repeated limb drop, a new lean or an insurer asking for professional evidence. A short written assessment for 1-5 trees is typically $450-$950. Advanced testing or climbing may add $250-$700 where visual inspection cannot answer a specific question.
2. Planning permit removal report.
This connects tree facts to the actual Cardinia Planning Scheme control. It should include species, dimensions, health, structure, retention value, site plan, photographs, reason for removal and feasible alternatives. Expect roughly $650-$1,500 for a straightforward residential application, excluding Council fees, survey work and specialist ecology. Read the Cardinia permit guide before commissioning it, because the applicable zone, overlay or title restriction determines the question.
3. Development impact and tree protection report.
This is for a house extension, driveway, retaining wall, subdivision, pool or service trench near retained trees. It uses AS 4970 principles to calculate Tree Protection Zones and Structural Root Zones, maps proposed encroachment, considers design changes and sets protection measures for demolition, excavation and construction. A simple project may be $1,200-$2,500; multiple trees, neighbour trees, survey revisions or Council responses can take it beyond $3,500. See the AS 4970 Cardinia guide for what should appear on plans.
4. Pre-purchase tree report.
This helps a buyer understand likely safety work, permits, access and near-term cost before finance becomes unconditional. For 1 suburban property, allow $450-$1,200 depending on tree numbers and whether a written budget is required. A useful report separates urgent work in 0-3 months, maintenance in 1-2 years and optional improvements, then gives broad cost bands rather than pretending a visual inspection is a contractor quote.
5. Neighbour or expert evidence report.
This defines overhang, root impacts, observed damage, tree condition and reasonable options while stating access limits and uncertainty. A factual letter may cost $450-$950. A court-ready expert report can be $1,200-$3,000 or more and should only be ordered after legal advice confirms the exact questions. The local trades directory helps identify when a surveyor, plumber or engineer is also needed.
The address matters as much as the tree.
Cardinia Council’s current vegetation guidance says approval may be required for a canopy tree in listed residential zones when the tree is more than 5 m high, has trunk circumference over 0.5 m measured at 1.4 m, and has canopy diameter at least 4 m. Measure all 3. A tree passing only 1 dimension does not meet that particular 3-part description, although another control may still apply.
Separate checks include Vegetation Protection, Environmental Significance, Erosion Management, Heritage, Design and Development and Significant Landscape Overlays. Native vegetation on land of at least 4,000 m² may require planning consideration. Existing planning permit conditions, approved landscape plans, covenants and Section 173 agreements can protect vegetation even when the general size test does not.
Bushfire exemptions are also conditional, not a blanket right to clear. Victorian 10/30 and 10/50 provisions depend on bushfire mapping, building use and approval or construction dates. Legal agreements or covenants can still prevent clearing. A report should identify which pathway is relied on and attach the property information used, rather than repeat “bushfire area” as a conclusion.
Nature-strip, roadside and Council-land trees are not yours to prune. Cardinia Local Law 17 requires written consent before interfering with vegetation on Council land or a road reserve, whether living or dead. A report can describe a defect, but Council controls the work decision.
What a decision-ready report contains.
- Purpose and client question: the report says whether it is for risk, permit, purchase, construction or dispute.
- Inspection details: date, weather, access, people present and any parts not inspected.
- Tree schedule: numbered trees, species, height, trunk measurements, canopy spread, health and structure.
- Plan and photographs: every tree number matches the map, images and recommendations.
- Method: visual assessment, instruments used, source documents and limits of the evidence.
- Reasoning: observations lead to conclusions, not simply “unsafe” or “remove.”
- Action and timing: exact pruning objective, monitoring interval, protection measure or removal priority.
- Standards: AS 4373 for amenity-tree pruning and AS 4970 where development protection applies.
- Author details: relevant arboricultural qualification, experience, business details and signature.
Red flags include no site plan, copied species descriptions, dimensions that were not measured, every tree receiving the same recommendation, claims beyond the author’s expertise, or a removal conclusion based only on leaf litter and shade. A 20-page template is not automatically better than a concise 6-page report. The test is whether another professional can follow the evidence and implement the recommendation.
Ask 8 questions that prevent variations.
- What exact decision will this report support?
- How many trees and which property documents are included?
- Is a site plan included, and who supplies the survey base?
- Will the author check zone, overlays and title restrictions?
- Are Council information requests or 1 revision included?
- Does the price include GST, travel and specialist testing?
- What qualification and experience does the report author hold?
- How soon after inspection will the signed PDF arrive?
A normal turnaround for a short residential report is around 3-7 business days after inspection. Development reports can take 7-15 business days once current plans are supplied. Urgent delivery may attract $150-$400, but speed is poor value if the survey, title or design is incomplete.
If physical work follows, request a separate itemised quote. Pruning should name the AS 4373 objective and removal should list access, rigging, cleanup, logs, stump and permit responsibility. Use the 2026 pricing guide and removal scope guide to compare like with like.
Describe the decision, not just the document.
Tell us whether the reader is Council, a builder, insurer, buyer, neighbour or your own household. We will scope the inspection and written deliverable around that use.