Sorry to hijack this thread but does anybody know the answer to my question.
A neighbour wants to 'knock through' from his kitchen/dining area ito his
conservatory. In effect he will be taking out the existing back door and
kitchen window and making it into a large opening, there will be no doors in
the opening it will be just that, an opening. He knows he will need a
lintel (or RSJ) but what about permission of some sort? He thinks he can do
what he wants as it is his house, I would say he is more than capable of
doing the job as he built his own garage a few years ago. I do not have a
problem with him doing it at all but do not want him to have any problems if
he comes to sell it in the future.

Cheers

John