We have a rear wall seperating our house from the one in the next road.The bulk of the wall is on our side-ish as their garden is above us iyswim.So its 6 ft tall and 3ft on their side.It is old and rickety but has been there for 150 yrs and they have had a fence attached to it.They took the fence down on Friday and the wall has bowed more.Their gardeners said they had to down tools as they thought if they started banging against it it could fall.They(builders)then came round and said we needed to fix as unsafe and could fall in our garden £1350. Rang the council as there is nothing on deeds and they say it is a boundary wall and ideally the cost should be split goodwill etc but this is not enforceable. They don't want to pay half but want to attach their new fence to the wall once it is up!!!!!!!!!!!Council say as this is just a b wall once its up they can.Now I have lost it as they want us to put up a new £1300 wall so that they can attach a £50 fence to it,I am happy to do the wall as it looks terrible but once up i don't want them to touch it.If we do nothing they may move their fence in a few feet as they want it done asap.The reason they can't put fence posts in is they have laid a slab patio and have no grass left I am going round in circles with them and our builders are even talking about putting up a brand new wall in front of the old one!