Praise be to Allah the Lord of the Worlds.
Mortgaging one`s property in favor of another person is a bare contract free of charge; thus, it isn`t permissible for the owner of the property to receive any sum in exchange for mortgaging it in favor of the debtor (Company). This is because the property and its benefits belong to the owner.
If the debtor is unable to make payments, the property is sold to settle the debt and the company becomes indebted to the owner of the property. And Allah The Almighty Knows Best.