emailtojohn wrote:My gut feeling is to try to solve it with your neighbour. Would he be interested in extending also? and if so you could both agree to build on the boundary wall, reducing building cost and creating more floor space.
If it is the gable side of the house then the neighbours house is a distance back and if he extends it probably won't have an affect on DanielO'Ds.
Anyway, it would be wise to check the boundary, as i doubt that the boundary is directly on your gable wall, as then the soffit would protrude onto his land. But the fact that existing fence is two inches wide makes no difference, You can build to the centre of that fence (if it is in the correct position).
If the boundary is your gable wall, then why can't you extend directly out in a straight line, as it doesn't pass onto his land.
And what your friend said about "your boundary" and his on the other side, is wrong, the boundary is between both your gardens.
It might be easier to give advice if we get a picture.