Understanding Significant Tree Protections Across Adelaide Councils

One of the most common surprises for Adelaide homeowners dealing with a problem tree is discovering that the tree they want removed is protected — and that removing it without approval carries real legal and financial consequences. South Australia's planning framework for tree protection is more detailed than most people realise, and it's worth understanding before you make any decisions about significant trees on your property.

The Planning and Design Code

South Australia's tree protection rules operate primarily through the Planning and Design Code (the Code), which came into effect in 2021 and replaced the previous Development Plan system. Under the Code, certain trees are classified as regulated trees and require Development Approval before they can be removed or significantly pruned.

The primary trigger for regulated status is a trunk circumference of 2 metres or more, measured at 1 metre above ground level. This equates to approximately 63cm in diameter — roughly the width of a large adult's arm span. There are additional considerations including height, canopy spread, and listed species in some council areas.

How Individual Councils Apply These Rules

The Code sets the floor — councils can apply additional protections beyond the baseline rules within their development plans. This is why the same sized tree might require a DA in one council area and not in another.

City of Norwood Payneham & St Peters

One of the most comprehensively protected council areas in Adelaide for trees. NPS maintains a Register of Significant Trees which lists trees of particular heritage, ecological, or landscape value. These trees may require a DA regardless of circumference. The register is publicly accessible and worth checking if you're in Norwood, Kensington, or Rose Park.

City of Unley

City of Unley applies regulated tree provisions broadly across its residential zones, with strong practical enforcement. The area has many older properties with mature trees that are frequently regulated. Development Approval is required for regulated trees.

City of Burnside

Burnside's proximity to the Adelaide Hills and significant native canopy makes it one of the more protective council areas for native species in particular. The council applies additional scrutiny to development applications that involve tree removal.

City of Campbelltown

Campbelltown maintains a significant tree register and applies regulated tree rules across its residential areas, particularly for mature species in older established suburbs.

City of Adelaide

The CBD and inner-ring suburbs governed by City of Adelaide have specific provisions for street trees and private trees, with several heritage-listed specimens. Council engagement is recommended before any significant tree work in the city fringe.

Northern and Southern Councils

Councils such as the City of Salisbury and City of Onkaparinga (which includes Morphett Vale and the southern suburbs) apply the baseline regulated tree rules under the Code but generally have fewer additional protections than inner-city councils. This means the 2-metre circumference threshold is often the primary trigger rather than specific lists or registers.

What the Development Application Process Involves

If your tree is regulated and you need to remove it, the DA process typically requires:

• A completed Development Application lodged with your council
• An arborist report — a formal assessment by a qualified arborist documenting the tree's condition, the reasons for removal, and the impact on the property and neighbourhood
• In some cases, supporting evidence of danger, disease, or development necessity
• A council fee (varies by council, typically modest)

Most applications for genuinely hazardous or diseased trees are approved, though councils can require replanting as a condition. The process typically takes several weeks.

Penalties for Non-Compliance

Removing a regulated tree without approval is an offence under South Australian planning law. Penalties can include:

• Expiation notices (on-the-spot fines)
• Orders to replace the removed tree at your cost — replacement with a mature equivalent specimen can cost thousands of dollars
• In more serious cases, prosecution through the courts

"I didn't know" is not a defence. If you've engaged a tree services operator and the work was done without the necessary approvals, you as the property owner bear responsibility for compliance.

Our Approach

As part of our tree removal service, we advise on permit requirements during the quoting process and can assist with documentation for straightforward applications. If you're not sure whether your tree is regulated, we'll assess it as part of the site visit and give you a clear answer before any work is proposed.