Is it permissible to agree with the property owner to raise its value to the bank to cover the first installment of the Murabaha?

It is not permissible to inflate the value of a property by agreement with the seller in order to take the increase, because that is usury (riba). The excess money beyond the real price is not part of the land's cost, and taking it directly or through collusion and returning it with interest is forbidden usury. It is also not permissible to collude with the property owner to inform the bank of an unreal price for the property.