next door is council, im private. I wish to higher my fence to stop my dog jumping over her garden.

I am paying for it and an fitting it, because its seperating our gardens do i need to ask her for permission to do this? Only putting a extra few feet onto this to stop the dog from jumping
can i just say that this woman has caused such a scene because my dog jumped over one time that she has called the police on me over reacting that one time.

She is a very awekward neighbour and she does know aboutthe fence but she doesnt think it'll make a difference.

I dont wish to speak to her about this as she wants to make this as difficult as it can get. She would prefer the dog to go to another home but to prevent this we want to higher the fence to stop her from throwing a fit as she is an very unpleasent person