Tree Removal in the Adelaide Hills — Three Regimes You Need to Know Before You Cut

Last updated: 5 May 2026.

Tree removal in the Adelaide Hills sits under three regulatory regimes at once: the state-wide regulated and significant tree rules under the Planning, Development and Infrastructure Act 2016 (PDIA), the Native Vegetation Act 1991 (administered by the Native Vegetation Council), and the Bushfire Protection Overlay under the Planning and Design Code. Most Hills properties sit inside all three. The 20-metre bushfire exemption is real and useful, but it doesn’t override the Native Vegetation Act and it doesn’t apply to significant trees. Get the regime stack wrong and you risk a $120,000 maximum penalty under PDIA and separate Native Vegetation Council penalties.

This guide walks through how the three regimes interact, where each one bites, and the practical sequence for getting tree work done legally on a Hills block.

What you need to know in 60 seconds

• State rule (PDIA): trunk circumference 1 m+ = regulated, 2 m+ = significant. Maximum penalty $120,000 for unauthorised tree-damaging activity.
• Native Vegetation Act 1991: applies to native vegetation across most of the Adelaide Hills Council area and Mount Barker rural land. Generally requires Native Vegetation Council consent before clearance — separate from the PDIA regime.
• Bushfire Protection Overlay: most Hills properties are inside Medium or High Bushfire Risk Hazards (Bushfire Protection) Overlays. Triggers a 20 m regulated-tree exemption around dwellings — but not for significant trees, and not under the Native Vegetation Act.
• Adelaide Hills Council: assesses regulated tree applications, manages council vegetation, runs the local position on the bushfire and native-vegetation regimes.

The state-wide regulated-tree framework is in our Adelaide tree removal permits guide. This page covers what changes when your block sits in the Hills.

When the Native Vegetation Act 1991 applies

The Native Vegetation Act 1991 (SA) protects native plants — trees, shrubs, ground cover — across most of South Australia outside metropolitan Adelaide proper. The Hills sit inside that “outside metro” zone. The Act is administered by the Native Vegetation Council, not Adelaide Hills Council. Two different bodies.

What counts as “native vegetation” under the Act

Native vegetation is defined as a plant or plants of a species indigenous to South Australia. Practically, that captures:

• Stringybark (Eucalyptus obliqua and others) — the dominant Hills canopy species.
• Manna gum (Eucalyptus viminalis).
• Pink gum (Eucalyptus fasciculosa).
• SA blue gum (Eucalyptus leucoxylon).
• Native understorey shrubs (banksia, hakea, acacia species, callistemon, native grasses).
• Native ferns and ground covers.

What it doesn’t capture: planted exotics, garden cultivars, fruit trees, ornamental deciduous (oak, beech, maple, plane). A heritage oak in a Stirling garden is regulated (potentially) under PDIA — but it’s not native vegetation.

What clearance generally requires

Under the Native Vegetation Act, clearance of native vegetation generally requires consent from the Native Vegetation Council. The Act sets out a long list of exemptions — fence-line maintenance, fire safety in specific zones, forestry, infrastructure, agricultural work — but for a Hills homeowner clearing trees on a residential or rural-living block, the default is: consent required.

The exemption that matters most for residential Hills owners is the fire-safety exemption, but that has narrow conditions. Genuine fuel-load reduction within a defined zone of a dwelling is exempt; landscape-clearing under the bushfire pretext is not. The CFS and the Native Vegetation Council both publish guidance.

How the Native Vegetation Act overlaps with PDIA

A native eucalypt on a Hills block can be both native vegetation under the 1991 Act and a regulated tree under PDIA. You need to think about both regimes:

• PDIA regulated/significant rules apply to the tree based on trunk circumference (1 m / 2 m).
• Native Vegetation Act applies because the tree is native vegetation.
• Bushfire Overlay 20 m exemption can satisfy the PDIA rule but does not satisfy the Native Vegetation Act.

Practical implication: a regulated-size stringybark within 20 m of your dwelling in a High Bushfire Risk Overlay may be exempt under PDIA and require Native Vegetation Council consent. Two boxes, both ticked.

The 20m bushfire exemption and its limits

The Bushfire Protection Overlay covers most of the Adelaide Hills, the Mitcham foothills, parts of Tea Tree Gully, parts of Onkaparinga, and pockets of other LGAs. Inside a Medium or High Bushfire Risk Overlay, an additional exemption applies to the regulated-tree regime: a regulated tree within 20 m of a dwelling can be removed without PDIA approval for bushfire-protection purposes.

That’s the headline. The conditions are tighter than most owners realise.

What the 20m exemption covers

• Regulated trees (1 m–2 m circumference) within 20 m of an existing dwelling, on the same allotment.
• For genuine bushfire-protection purposes — fuel-load reduction, ember-attack management, defensible space.
• Where the property is in a Medium or High Bushfire Risk Overlay mapped under the Planning and Design Code.

What the 20m exemption does not cover

• Significant trees. A 2 m+ circumference tree, or a Part 10-listed significant tree, still needs approval — even within 20 m of the dwelling.
• Native vegetation under the 1991 Act. The Bushfire Overlay is a PDIA carve-out. It doesn’t override the Native Vegetation Council’s jurisdiction. For native species (most Hills eucalypts), you still need to check NVC consent or a documented exemption.
• Landscape clearing under the bushfire pretext. The exemption is for genuine fire-fuel reduction. Council planners and the NVC both take a hard line on landscape clearing dressed up as bushfire work.
• Trees outside 20 m of the dwelling. Exemption is about the dwelling, not the boundary.
• Trees on a vacant block. No dwelling, no 20 m rule.

How to actually use the exemption

The safe path: get the work assessed by an arborist and check the property’s Native Vegetation Act position before cutting. Document the assessment, the bushfire-protection rationale, and any photographs taken pre-work. If council or the NVC asks later — and on a Hills block they sometimes do — that documentation is your defence.

For ongoing compliance, see our bushfire tree management guide on what CFS expects and how annual fuel-load reduction work is structured.

Adelaide Hills Council’s overlay on top

Adelaide Hills Council assesses regulated tree applications under PDIA. The Hills-specific elements:

Geography drives the workload

Adelaide Hills Council covers a large area — Stirling, Aldgate, Crafers, Bridgewater, Hahndorf, Mylor, Heathfield, Mt Lofty district, Lobethal, Woodside, and the surrounding rural-living blocks. Township properties (in the Stirling village core, for example) are treated more like metro Adelaide for tree purposes. Rural-living blocks (large blocks outside the township boundary) tend to engage the Native Vegetation Act more directly.

The Trees and Vegetation page

The council publishes guidance at ahc.sa.gov.au/environment/trees-and-vegetation. Two practical points the page makes:

1. The Native Vegetation Act 1991 covers most of the Adelaide Hills Council area — owners may have obligations under that Act in addition to the regulated tree rules.
2. The Regulated and Significant Tree Overlay applies to townships in the Adelaide Hills Council area and parts of Mount Barker. Outside the township overlay, the Native Vegetation Act often does the heavy lifting.

Application process

Where a regulated tree application is needed — for a regulated or significant tree in a township, or for non-native species — the application goes through PlanSA and is assessed by Adelaide Hills Council. The arborist report standard is the same as metro councils: AQF Level 5 consulting arborist, tree health, structural condition, demonstrated risk, alternatives to removal. See the arborist reports service page for scope.

For native vegetation clearance on a non-township block, the application path is different — through the Native Vegetation Council, which has its own application form, fees and timelines.

CFS and bushfire compliance work

Annual bushfire compliance work is a separate operational track from tree removal. The CFS publishes site assessment guidance and the Bushfire Survival Plan template. What this looks like in practice for a Hills owner:

• Annual fuel-load reduction in the dwelling protection zone — typically the 20 m around the house. Cut grass low, remove ground litter, prune lower branches up.
• Crown maintenance on retained trees — reducing canopy density, lifting lower limbs to break the fuel ladder, removing dead wood.
• Strategic removal of trees identified as high-risk in the dwelling protection zone — significant trees still require approval, native species still engage the Native Vegetation Act if non-exempt.

The CFS does not “approve” tree work — it sets the standard for fire-survival planning. Your insurer may also have requirements that drive the work. The arborist’s job is to deliver work that meets both the fire-safety expectations and the regulatory regime.

Common Hills species and how each is treated

The Hills’ tree population is roughly 70–80% native eucalypts, 20–30% exotic deciduous and ornamentals (heritage gardens, township plantings).

Species	Common location	Native?	PDIA exposure	NVC exposure
Stringybark (E. obliqua)	Mt Lofty Ranges across the council	Native	Regulated/significant by trunk size	Yes
Manna gum (E. viminalis)	Wetter gullies, southern faces	Native	Regulated/significant by trunk size	Yes
Pink gum (E. fasciculosa)	Drier ridges	Native	Regulated/significant by trunk size	Yes
SA blue gum (E. leucoxylon)	Mid-elevation, common ornamental	Native	Regulated/significant by trunk size	Yes
English oak (Quercus robur)	Heritage township gardens (Stirling, Aldgate)	Not native	Regulated by trunk size	No
European beech	Heritage gardens	Not native	Regulated by trunk size	No
Japanese maple	Smaller township gardens	Not native	Usually below regulated size	No
Liquidambar	Township and rural-living gardens	Not native	Regulated at maturity	No

The exotic deciduous species are the simplest to remove — only PDIA applies, and the dwelling/pool exemption is available where it fits. The native eucalypts are the most complex — both regimes potentially apply, and the species exemption to the 3 m PDIA dwelling exemption catches all of them at the regulated-tree level.

Frequently asked questions

Do I need Native Vegetation Council approval to clear trees in the Hills? For native species — most Hills eucalypts and indigenous shrubs — the default is yes, unless an exemption applies. The Native Vegetation Act 1991 is administered by the Native Vegetation Council, separate from Adelaide Hills Council and separate from PlanSA. Bushfire-safety exemptions exist but have narrow conditions. Get advice before clearing.

Does the 20m bushfire exemption apply to significant trees? No. The 20 m bushfire exemption under the Planning and Design Code applies to regulated trees (1 m–2 m circumference). Significant trees (2 m+ circumference, or individually listed in Part 10) still need development approval, even within 20 m of a dwelling.

Can I clear trees on my Hills block for fire safety? Within the 20 m dwelling protection zone, regulated trees can generally be removed under the bushfire exemption for genuine fire-protection work — provided the property is in a Medium or High Bushfire Risk Overlay. Significant trees still require approval. Native vegetation may still require Native Vegetation Council consent. The “for fire safety” framing matters: landscape clearance dressed up as bushfire work is treated as the offence it is.

Who do I call for a bushfire-compliance arborist report? A qualified consulting arborist (AQF Level 5) can assess the dwelling protection zone, identify high-risk trees, recommend fuel-load reduction work, and document the work for insurance and compliance purposes. The report sits alongside (not in place of) the CFS’s own Bushfire Survival Plan. See our land clearing service page for the work scope.

Are oak trees regulated in the Hills? At regulated-size trunk circumference (1 m+), yes — under the same PDIA rules that apply to any regulated tree. Oak is not native, so the Native Vegetation Act doesn’t apply. The 3 m dwelling exemption applies to oak (it’s not on the eucalypt/corymbia/angophora/willow myrtle exclusion list), so a regulated oak within 3 m of an existing dwelling can be removed under PDIA. Outside that, application required.

Sources

• SA Legislation — Native Vegetation Act 1991
• Department for Environment and Water — Native vegetation
• Adelaide Hills Council — Trees and vegetation
• CFS — Plan and prepare: Bushfire Survival Plan
• PlanSA — Significant and regulated trees
• Law Handbook SA — Native Vegetation Act 1991
• SA Legislation — PDIA (Regulated and Significant Trees) Amendment Regulations 2024

This guide reflects the law and the published positions of Adelaide Hills Council, the Native Vegetation Council, the CFS and PlanSA as we understand them on 5 May 2026. It is not legal advice. For a specific tree on a Hills block, get an arborist assessment, confirm the Native Vegetation Act position, and check the Bushfire Overlay status before any work.