The quick check
Measure around the trunk 1 metre above natural ground level:
< 1 m
Generally not controlled
Unless other rules apply (e.g. heritage or native vegetation).
≥ 1 m
Regulated tree
Removal and major pruning usually need approval.
≥ 2 m
Significant tree
Higher level of protection; stronger justification needed.
Thresholds apply in metropolitan Adelaide and some other areas, following reforms that took effect in May 2024. Multi-trunk trees are assessed using combined measurements.
01When do I need approval?
If a tree is regulated or significant, removal and tree-damaging activity — including major pruning — generally requires development approval, lodged through PlanSA.
Some situations are exempt, such as certain species, dead trees, genuine emergencies and limited maintenance pruning. Exemptions have specific conditions, so it's worth confirming before you start work.
02When will council want an arborist report?
Councils commonly ask for a report from a qualified arborist when you apply to:
- remove or significantly prune a regulated or significant tree
- build, extend or excavate near a protected tree
- justify removal on the grounds of risk, health or damage to structures
A clear, evidence-based report helps council assess the application properly — whether the outcome is approval to remove, or a way to keep the tree.
03Building near trees: AS 4970-2025
AS 4970-2025, Protection of trees on development sites, replaced the 2009 edition in 2025. It sets out how tree protection zones are calculated, how much encroachment a tree can tolerate, and how trees should be protected and monitored during construction.
Getting tree advice early in the design — before plans are locked in — is usually far cheaper than redesigning after council raises a tree issue.
04What about a neighbour's tree?
The same thresholds apply regardless of whose land the tree is on. If you're concerned a neighbouring tree is unsafe, a professional assessment gives you documented findings to discuss with your neighbour, council or insurer.
Not sure where your tree sits?
We confirm a tree's status and any exemptions on site, and can prepare the report council needs. Call 0412 736 418.
This guide is general information only and isn't legal or planning advice. Rules vary by location and circumstance — always confirm requirements for your property with PlanSA or your local council.