My neighbours recently built a side extention over their garage. All works were subject to the party wall act and were going smoothly. However, they have just taken down their scaffolding and I have noticed a velux roof window that is not obscured glass. The window is directly facing my en suite, which is at first floor level. I contacted the surveyor who insists its a skylight window , so does not need to be obscured glass. The planning decision says that any 'flank' windows are to be obscured glass. I would argue it is a flank window , as at is facing my first floor ensuite? I'm not happy as this is an invasion of privacy. Can anyone help?