It is not permissible to spend zakah on building a mosque
Machine translationRead the Arabic original
The Shaykh : A man spent his zakah on building mosques. Is it sufficient? No, because it is not among the eight categories. Allah, Mighty and Majestic, said: [An-Nisa 4:11] This means it is obligatory that it be spent on these eight categories. The Lord of creation, Mighty and Majestic, and Allah is All-Knowing and Wise, so by His knowledge and wisdom, He restricted it to this. Now, these are eight.