Party wall confusion

[PeterPool]

I live in a centre terraced house. Each house in the row has a kitchen built onto the back. All the kitchens are parallel and have a gap between them of a few feet. My kitchen wall, as far as I can understand, is on my side of the boundary with my neighbour's property. There is a space that belongs to my neighbour and then his kitchen. My neighbour has attached a very small porch to part of my kitchen wall. It is a light weight wooden construction. Does the existence of this porch mean that my kitchen wall has become a party wall? Is just the section of the wall covered by the porch a party wall or does it mean that the whole wall is now a party wall?

[ostell]

It means he is trespassing on your property.