A) If their wall straddles the boundary it is a party wall, ie it’s a shared wall as half is in each others landJust remembered that when the neighbours originally applied for loft conversion they also were going to have the ground floor extension extended further. I just viewed the plans and clearly shows in their plans that existing extension is on the boundary line. Does this mean it is a party wall and can leave the tap there?
B) If their wall upto the edge of the boundary, then it’s a boundary wall
If they want to extend they will need a party wall agreement for A) or if B) a party wall notice (line of junction notice)
If the wall is straddling the boundary, the wall is shared between you both….although it’s only half the outer brick skin that’s straddling the boundary, the cavity and inner blockwork is on his side.
