Bumped into the Victorian rules today.
http://www.liv.asn.au/public/legalinfo/neighbour/neighbour-Trees.html
If branches from a neighbour’s tree overhang your property or its roots spread onto your land causing a nuisance or damage to your property, you are entitled to cut off the branches or sever the roots.
* Take care not to needlessly kill the tree or make it unstable. If the tree is needlessly damaged or becomes unstable and causes damage to other property, you may be liable to pay compensation.
* In the absence of an agreement with your neighbour or a court order, you will have to bear any cost of tree lopping yourself.
* The limbs or roots remain the property of your neighbour.
o They should be returned to your neighbour or disposed of by agreement.
* If a tree is causing physical damage to your property you can apply to the Magistrates Court for an order requiring your neighbour to remove the tree.
o You may be entitled to recover compensation for damages.
Resolving a dispute
1. Speak to your neighbour about the problem in a friendly and non-confrontational way.
2. If a solution cannot be reached, remove the limbs or roots yourself. Make sure you do not damage the tree.
3. If damage has occurred, consult a solicitor to pursue alternative dispute resolution methods.
4. If the neighbour still refuses to take action, you can commence proceedings in the Magistrates court.
Legal action should always be a last resort as it can have lasting detrimental effect on neighbour relations.