Gum tree removal in Australia: approval, cost and the questions councils actually ask

The short answer

There is no national rule for gum trees, and no rule anywhere in Australia that says a gum on your own land is yours to remove. In most council areas a eucalypt of mature size needs written approval, and gums reach the trigger sizes early because they grow big. Many councils go further and give locally native species either a lower threshold or outright protection, which in most of the country means gums specifically.

The realistic path is: find out whether the tree is protected, and if it is, build a case that answers the council's actual test rather than your own reasons for wanting it gone. Those two things are usually different, and that gap is where most refused applications sit.

Why a gum is treated differently

“Gum tree” is not one species. It is everyday Australian shorthand for eucalypts, a genus of several hundred species, and the ones people commonly have in a backyard include river red gum, sugar gum, spotted gum, lemon-scented gum, scribbly gum and the ironbarks. What they share is the set of traits that make councils cautious:

• They are native. Council tree controls very often set a lower size threshold for locally indigenous species than for exotics, or list natives as protected regardless of size. A gum and a similarly sized ornamental on the same street can sit on opposite sides of the line.
• They get large. Permit triggers are usually written as a height, a trunk diameter or a canopy spread. A gum passes those numbers years before most garden trees do, so a tree you think of as ordinary is often already over the line.
• Mature ones carry habitat value. This is the factor most homeowners do not anticipate, and it is covered in its own section below.
• They are often the canopy. Many councils now have urban canopy targets, and in most Australian suburbs the eucalypts are what the canopy is made of. That shows up as a stricter assessment and, commonly, a replacement planting condition.

None of this makes removal impossible. It does mean the assumption people usually start with, that a healthy tree in a private backyard is a private matter, is the wrong starting point for a eucalypt.

Do I need approval? How to actually check

Work through these in order. Each one can independently make the tree protected, so a “no” on the first question does not end the check.

1. Your council's tree controls. The main event. Look for the size threshold and whether natives are treated separately. Our permit checker gives you the position for your suburb, and the state law pages explain how the controls are structured in each state and territory.
2. Planning overlays on your property. Vegetation, significant landscape and environmental overlays can protect a tree that the general council threshold would have let through.
3. Statewide size rules. The ACT and South Australia are the two jurisdictions that protect private-land trees by size at state or territory level. Elsewhere it is council by council.
4. Significant tree registers and heritage listings. A listed tree is a separate and much higher hurdle, and large old gums are exactly the kind of tree that gets listed.
5. Native vegetation and threatened species law. Relevant on larger blocks, rural land and anywhere clearing is more than a single garden tree, and relevant to gums in particular because of what lives in them.

Our guide on whether your tree is protected walks through each of these in more detail.

Limb drop: the reason people want them gone, and why it rarely wins on its own

This is the single most common reason Australians give for wanting a gum removed. Large eucalypts sometimes shed apparently healthy limbs with no warning, often on hot, still summer afternoons, in a phenomenon usually called summer branch drop or sudden limb drop. It is real, it is well documented, and it is genuinely dangerous when there is something underneath.

Vicki-Jo Russell of Trees For Life, interviewed by the Adelaide Park Lands Association, notes there is no single agreed explanation for it, that it is associated with weather conditions along with the health, age and crown weight of the tree, and that it is likely a resilience measure allowing the tree to jettison a branch to protect itself. In South Australia, river red gums and sugar gums are described as the most susceptible. The practical advice given is to avoid sitting under large gums in hot or windy weather.

Here is why that does not automatically get you an approval. If limb drop is normal behaviour for the species rather than a defect in your particular tree, then pointing at the species tells the council nothing about the tree in front of them. Every mature gum in the suburb would qualify on the same argument.

What does move an assessment:

• A documented defect on your tree. Included bark at a major union, a significant cavity or decay pocket, a crack, fungal fruiting bodies at the base, a lean that has changed. Assessed and written up by a qualified arborist, this is evidence about your tree.
• A target that cannot be moved. Risk is a function of what is underneath as well as the tree. A limb over a bedroom roof reads differently from a limb over a back corner of the lawn, and moving the trampoline is a genuine mitigation a council may propose instead of removal.
• A history you can prove. If it has already dropped limbs, photograph them next to something for scale, date the photos, and keep them. Most people clean up first and photograph nothing.
• An arborist report. For a mature gum this is close to unavoidable. See how to get an arborist report.

Hollows: the part that surprises people

If your gum has hollows, expect the application to be harder, and expect the council to raise it even if you have not thought about it.

Tree hollows in Australia form slowly. NSW government material on hollow-dependent wildlife notes that hollows generally take at least 100 years to develop to a size that provides habitat, with small hollows taking at least 80 years and the large ones used by species such as forest owls and greater gliders taking as long as 220 years. The same material notes that in New South Wales at least 174 animal species rely on tree hollows, including 46 mammals, 81 birds, 31 reptiles and 16 frogs.

Eucalypts are the trees that produce most of them. That is why a council officer can treat one mature gum as effectively irreplaceable: a replacement planting condition gives back a tree, but not a hollow, for the better part of a century. It is also why a dead standing gum, known as a stag, is sometimes protected when other dead trees are not, and why some councils will ask you to retain a section of trunk rather than take the whole thing.

If removal is genuinely necessary, it is worth raising habitat yourself in the application. Retaining a trunk section, installing nest boxes, or salvaging and remounting hollow limbs are all things councils have accepted as mitigation, and proposing them reads very differently from being asked.

What gum tree removal costs

Gums sit at the top of Australian tree removal pricing for two structural reasons. They are tall, so the work is sectional dismantling and rigging rather than a straight fell, and eucalypt timber is dense hardwood, so there is simply more weight to lower, cut and cart. A 12 metre gum and a 12 metre exotic are not the same job.

Indicative national ranges by height:

Indicative ranges only, compiled from published Australian price guides. These are not quotes and not prices we set. See tree removal cost for the full breakdown.

Budget separately for the things that are usually quoted as extras: stump grinding (roughly $100 to $800, and old gum stumps sit at the top of that), green waste removal, a council permit application, and an arborist report if one is required. On a big gum, two more factors move the price more than anything else. Access, because a tree a crane can reach is a different job from one that has to be carried out through a side gate. And what is underneath, because a gum over a pool, a shed or a neighbour's roof needs every piece lowered rather than dropped.

Before you decide on removal

Councils will generally look for a lesser option before approving the removal of a healthy mature eucalypt, so it is worth knowing what those options are.

• Selective pruning and deadwooding. Removing dead, weak or overloaded limbs addresses a real part of the risk and is far cheaper than removal. Ask for it by the correct pruning class, not as “taking a bit off”. See tree lopping vs pruning.
• Moving the target. Relocating the seating, the trampoline or the parking spot is sometimes the whole answer, and councils will suggest it.
• Root management, not removal. If the problem is pipes or paving, the fix is often relining or a root barrier. See tree roots damaging pipes or foundations.
• Bushfire clearing entitlements. In NSW, the 10/50 scheme can allow clearing near a home in a declared entitlement area without council approval, and it can override a tree preservation order. See the NSW 10/50 guide for the conditions and exclusions.

One thing to avoid entirely: a contractor who tells you a permit is not needed for a mature gum, especially if the quote is cheap for the size of the tree. The liability for unauthorised removal sits with the landowner, not the crew, and the tree cannot be put back.