The ruling on purchasing real estate from the Housing Bank and selling it before taking possession

Question : The Housing and Construction Bank builds properties. The buyer pays fifty percent of the property's value when the contract is signed, and takes possession after four years. The remainder is paid in installments over thirty years. Is this permissible? And this is done by the state?

Answer : Fine, this is permissible and there is no problem with it. Is it permissible for me to sell this property before taking possession of it? It is not permissible, until you take possession of it. And it must be known, meaning that a condition for the validity of the sold item or the sale is that it be known.