Tree branches: when you can cut them yourself and when you cannot.

Hazard signs in branches

Dead wood in the canopy is your first signal. A branch that is leafless when the rest of the tree is not, or one with bark peeling back from dry, grey wood underneath, is dying. It will come down on its own schedule, not yours.

Five signs that warrant a serious look:

1. Dead wood. Brown, leafless, with bark that lifts or flakes. Tap it — hollow sounds worse than solid sounds.
2. Included bark. V-shaped forks where the bark folds inward between the two stems rather than forming a clean ridge. This is a structural failure point, particularly in eucalypts, brush box, and camphor laurels. Wide U-shaped forks are strong; tight V-shaped forks are not.
3. Fungal brackets. Shelf fungi along the branch or at the junction with the trunk mean decay is active inside the wood. The bracket is the fruiting body — the decay extends back from it, often much further than you can see.
4. Cracks or splits. Longitudinal cracks along the branch, or where it meets the trunk. These are structural defects, not cosmetic ones.
5. Hanging branches (widow makers). A branch held up only by other branches around it, having already partly broken. These drop without warning. Treat any hanging branch as urgent.

Rule of thumb: if a branch is over your roof, your car, a path where people walk regularly, or near a powerline — and it shows any of the above signs — stop trying to assess it yourself and call someone who climbs trees for a living.

For smaller branches in the canopy that are clearly dead and within safe reach from the ground, removal is reasonable DIY. Use the size and height guidelines in the section below before you decide.

Your rights with a neighbour's overhanging branches

This comes up constantly. The answer in most Australian states is yes, you can cut back branches that cross your boundary — but there are conditions that matter.

The general position under Australian common law, confirmed in cases including Robson v Leischke [2008] NSWCA 152 and Hinde v Tuite [2010] VSC 546, is:

• You may trim encroaching branches and roots back to the boundary line, at your own expense.
• You may not trespass onto your neighbour's property to do the work.
• You must offer the severed material back to your neighbour (or ask them to collect it). You cannot simply dispose of it.
• You may not claim compensation from your neighbour for the cost of the work.
• You must not cause unreasonable damage to the tree in the process.

That last point is the one most people miss. If cutting to the boundary would remove more than roughly 30% of the canopy, or sever major structural roots, you may be liable for the damage. Get written agreement from your neighbour before touching a tree that could be substantially harmed by boundary-line cutting. A short email to confirm the plan is enough.

Two situations where the above does not straightforwardly apply:

Protected trees. If the tree is on a council Significant Tree Register, covered by a Vegetation Protection Order, or listed under a Local Environmental Plan, no cutting — even to the boundary — may be legal without a permit. The neighbour would need to apply for that permit; you cannot apply on their behalf.

Imminent danger. If a branch is clearly about to fall and poses immediate risk to life or property, emergency action is harder to argue against legally. Call your council's emergency line first — many have provisions for this — and document everything with photos and timestamps before any cuts are made.

If the relationship with your neighbour is already difficult, get written agreement or involve your council early. A mediator from your state's community justice centre is a cheaper path than a solicitor.

DIY branch removal: size and height limits

Three things determine whether DIY branch removal makes sense: the diameter, the height, and what is below the drop zone.

Diameter guide

When NOT to do it yourself

This matters more than the diameter table above. Stop and call a professional if any of these apply:

• The branch is over a structure, vehicle, or any area where people spend time.
• Reaching the branch requires a ladder plus a cutting tool simultaneously. Ladders and saws used together at height account for a significant proportion of tree-work fatalities (SafeWork Australia incident data). This is not a small risk.
• The branch has included bark, cracks, or shows other structural defects. Defective branches under load can move or fall unexpectedly during cutting.
• The branch is near or over a powerline. If it is within 3 metres of a powerline, that is a job for the network operator (Ausgrid, Endeavour Energy, United Energy, Energex, SA Power Networks, Western Power, ActewAGL — depending on your state). Call them directly. They do not charge for line clearance.
• You would need to brace yourself against the tree to make the cut.

A mate with a chainsaw and no harness on a step ladder is how properties get damaged and people end up in hospital. For branch work above about 3 metres, the right answer is almost always to call a qualified arborist who carries public liability insurance and has the correct climbing kit.

Correct cutting technique: the collar cut

Most DIY branch cuts that cause long-term harm to a tree do so the same way: flush with the trunk, cutting right through the branch collar.

The branch collar is the raised ring of tissue at the base of every branch where it meets the trunk or parent stem. It contains the cells the tree uses to seal off the wound after a branch is removed. Cut through it, and the tree cannot compartmentalise the wound properly. Decay enters and works inward, sometimes reaching the trunk years later.

The correct cut is just outside the collar — leaving the collar intact — at a slight downward angle so water runs away from the wound. Not a steep 45-degree angle, just enough clearance to avoid leaving a water-trapping stub.

Three-cut method for branches over 40mm

AS 4373 (the Australian Standard for pruning of amenity trees) recommends a three-cut method for larger branches to prevent the branch tearing back to the trunk during the final cut:

1. Undercut

   Make a partial cut from underneath, about 30cm out from your planned final cut position. Saw upward until you are roughly one-third of the way through the branch. This breaks any tear if the branch drops early.

2. Top cut

   Move slightly further out (a few centimetres beyond the undercut) and cut down from above until the branch drops cleanly. The stub remaining is now manageable and tear-free.

3. Final cut

   Now cut the stub cleanly just outside the branch collar. Check the angle — it should follow the collar's natural line, not be vertical or horizontal.

Do not apply wound sealant or pruning paint. Arboriculture Australia stopped recommending this decades ago. Sealants can trap moisture and actually accelerate internal decay rather than preventing it. The tree handles wound closure on its own, provided the collar is intact.

What to do with the clippings

Branches under 30–50mm diameter (the limit varies by council — check yours) go in the green waste bin for regular collection. Anything larger needs a different approach.

• Council kerbside green waste collection. City of Sydney, City of Melbourne, Brisbane City Council, City of Adelaide, and most Canberra districts run scheduled bulk green waste collections, typically one to four times a year. Book online via your council's website. You can usually put cut material out several days before the collection date.
• Chipper hire. Kennards, Coates Hire, and most hire centres stock residential chippers for $150–$250 per day. Practical for a day's worth of pruning. The resulting chips make reasonable garden mulch.
• Arborist chipper. If you are paying an arborist for the cutting work, most will chip on site at no additional charge and either take the mulch or leave it at your request.
• Transfer station. Every capital city has green waste transfer stations that accept load-by-load drop-offs. Fees are typically $10–$40 depending on volume and site.

When your council gets a say

Most Australian councils have placed a subset of trees under formal protection — via Development Control Plans, Vegetation Protection Orders, Local Environmental Plans, or Significant Tree Registers. The protection does not just apply to removing the whole tree. Substantially pruning a branch can also require a permit.

Common triggers for protection:

• Trunk circumference over 30cm measured at 1 metre height — widely used in NSW councils including Ku-ring-gai, Northern Beaches, and Lane Cove
• Tree height over 6 or 8 metres
• Listed species: Sydney Blue Gum (Eucalyptus saligna), Moreton Bay Fig (Ficus macrophylla), Spotted Gum (Corymbia maculata), and most large native eucalypts are protected in most metro areas
• Heritage overlay, Conservation Area, or Riparian Zone designation (VIC)

Under these protections, removing even a single major branch may require a Development Application or a tree pruning permit. The fine applies whether or not you knew the tree was protected.

Before cutting any branch from a tree that is over 6 metres or has a trunk wider than your forearm, check your council's online DCP maps — most are publicly searchable by address. Or simply call the council planning line and ask. It is free, and the answer takes five minutes. Doing it after the fact is much more expensive.

Our position: if it is a large Sydney Blue Gum in Wahroonga, a Moreton Bay Fig in New Farm, or anything over 8 metres in the ACT, get confirmation from council before any cutting happens. The fine is not the only problem — council can also require you to remediate or replace a damaged protected tree at your cost.

If the tree genuinely needs significant branch work and you have confirmed it is protected, a qualified arborist can manage the permit application and carry out the work to the standard the council requires. That is usually faster and cheaper than trying to navigate the DA process yourself.

Frequently asked