Making use of the depression in the land on which the Masjid is built

A: If the reality is as mentioned in the question, there is nothing wrong with allocating this depression for the mentioned purpose, that is, for building lodgings for the Imam and the Mu'adhin, toilets, and chambers for washing and enshrouding the dead in order to level the roof of these utilities with (Part No. 5; Page No. 229) the floor of the Masjid for the benefit of the Masjid. May Allah guide all people to the best.May peace and blessings be upon our Prophet Muhammad, his family, and Companions!