I live in a semi-detached house. The owner of the other house is quite overbearing. The front garden at the moment is completely open - i.e. no fence between the gardens. Neighbour often walks onto my side to look at my plants, prune my roses (!) etc. I don't like it and would like to put up a small fence between us (thinking low picket fence type thing). Mentioned it to her and she doesn't want a fence.
The boundary is hers.
Can I just put a fence up anyway and put it slightly more on my side?