The first step is to talk to your neighbour.

If your neighbour doesn't own the property, you'll have to talk with the owner, if you know who that is. In some cases, this may be a strata manager, company, trustee, or similar.

• If your neighbour (owner) is happy to cooperate, they can apply to prune or remove the tree.
• If you can’t talk to the neighbour, or they don’t agree to your request, you can apply to prune parts of the tree that hang over your side of the boundary. Council will inspect the tree from your property and consider what pruning can be done to reduce the issues caused by your neighbour’s tree.

Note that you can't apply to remove a tree on someone else's property without their agreement.