Prayer: Selling or Reusing Mosque Fixtures
Practical Laws of Islam as per the teachings of Ayatullah Sistani
Ruling 896
Selling the doors, windows, and other things of a mosque is unlawful; and if a mosque becomes ruined, these things must be used solely for the renovation of the same mosque. In the event that they are of no use to that mosque, they must be used in another mosque. If they are of no use to other mosques, they can be sold and the proceeds must be used solely for the renovation of that same mosque, if possible. If this is not possible either, the proceeds must be used on the renovation of another mosque.