If your property and your neighbour's are not separated by an adequate fence, you can require your neighbour to contribute half of the cost of building an adequate fend. This general rule and the procedure for doing this are contained in the FENCING ACT 1978.
A fence is "adequate" under the FENCING ACT 1978 if its nature, condition and state of repair is reasonably satisfactory for the purpose it serves or is intended to serve. The Second Schedule of the Act sets out some specimen types of fences for urban and rural properties.
If you have decided that a fence is necessary and that you want your neighbour to contribute to the cost, you must serve notice on the neighbour. The notice must state:
Guidelines on the form and contents of the notice are contained in the First Schedule of the FENCING ACT 1978.
The neighbour then has 21 days to do either of the following:
If the neighbour doesn’t respond within 21 days, the law treats the neighbour as having agreed to the proposal.
Guidelines on the form and contents of the cross-notice are contained in the First Schedule of the FENCING ACT 1978.
If you and your neighbour cannot agree on a proposal for a fence, the dispute may be resolved through the Disputes Tribunal (for disputed amounts up to $7,500) or the District Court.
If a fence is damaged or destroyed and requires immediate work, either your or your neighbour may do the work and recover half the cost from the other.
If you're required to build a fence under the FENCING OF SWIMMING POOLS ACT 1987, the extra work that is required by that Act over and above what would otherwise by required is your responsibility as the pool owner.