Replacing a fence can be a costly endeavour. The average cost of installation is around £100 per panel, according to the tradesman finding site My Builder. If for example, you are looking to install eight panels, a cost of £1,000 is not unusual and that does not take into account the removal of the old fence to begin with. Trying to find a fair and reasonable solution with your neighbour should always be the first course of action. But not everyone likes being fair and reasonable – particularly when money is at stake. If you feel your neighbour's garden fence is a danger, you can report this to your local council.