Is that possible to give my Zakaat for building a mosque?
Zakaat cannot be used for building a mosque, nor can it be used for other works that are connected to the functioning of the mosque such as maintenance, water bills, electricity bills, purchasing books / Quran, paying Maktab teachers or the Imaam. When Zakaat or Sadaqa is given to a mosque, it becomes the responsibility of the authorities of the mosque to reach it / give it to those that are deserving of Zakaat.
And Allah knows best.
Mufti Waseem Khan