Question: There are two Masjids in our locality. One is complete and the other isn’t. There are no funds to complete the other Masjid. Is it permissible to utilize the funds of the fully built Masjid on the half built masjid?
Answer: If the donaters of the money to the built Masjid are happy, then that money can be used to finish the half built Masjid.
Fataawah Mahmoodiyah Vol 22, pg 146