Can I use interest money for the construction of Masjid’s toilet?
بسم الله الرحمن الرحيم
(Fatwa: 1522/1255/B=10/1435)
No, you cannot. Interest money should be given to poor and needy ones without the intention of reward.
Allah knows Best!
Darul Ifta,
Darul Uloom Deoband