Q.Is it permissible to use money from Kafirs to build toilets or drains in a masjid or its surroundings?
A. Yes, it is permissible to do so.
And Allah knows best.
Mufti Waseem Khan
This answer was collected from DarulUloomTT.net, which is operated under the supervision of Mufti Waseem Khan from Darul Uloom Trinidad and Tobago.