the distance between the rear wall of the extended part of the house and the rear boundary of the house, normally the rear garden fence or wall, must be at least 10.5 metres
rhaid i’r pellter rhwng wal gefn yr estyniad a’r ffin yng nghefn y tŷ, sef ffens neu wal yr ardd fel rheol, fod yn o leiaf 10.5 metr