In the Name of Allah, the Most Gracious, the Most Merciful.
As-salāmu ‘alaykum wa-rahmatullāhi wa-barakātuh.
A Masjid is a type of Waqf. For a property to be designated as a Masjid, it must be designated as Waqf and it should be used by worshippers. Additionally, the legal status of the building should support the Masjid to be a Waqf.
And Allah Alone Knows Best
Mufti Faraz Adam,
I Waqf Shariah Advisor