You may be at an early stage, still thinking about getting plans drawn up for a Planning Application, or you may already have gained Planning Permission. Perhaps your planned works fall under ‘Permitted Development’ and don’t even need Planning Permission.
With Planning Permission, Building Regulations Approval, Party Wall Awards all in hand you would think you’d be good to go, wouldn’t you?
Unfortunately, this may not be the case.
Even despite you having gained all statutory consents, if your neighbour has a legal right to light to their windows, and your proposed works will cause the light to those windows to be diminished to a certain level, your neighbour might be able to get an injunction to stop you building, or worse, make you demolish what you have already built.
If the case was not strong enough for an injunction, the other remedy would be compensation, which can often involve hefty sums having to be paid to neighbours.