Question 13: I ask about the ruling concerning facing the Qiblah (Ka`bah-direction faced in Prayer) or turning one’s back towards it while relieving oneself, inside a building or out in the open. What is the ruling on buildings that are currently being used and in which there are toilets that face the Qiblah or have the Qiblah behind them? It is worth mentioning that this cannot be changed except by destroying the bathroom completely or partially to make the changes. If we have designs and the buildings have not been built yet, and some of the toilets face towards the Qiblah or have the Qiblah behind them, is it obligatory to change them or does it not matter?
Answer: All Praise is due to Allaah Alone and peace and blessings be upon His Messenger, his family and Companions. Firstly, according to the soundest opinion of scholars, it is Haraam (prohibited) to face the Qiblah or turn one’s back towards it… read more here.