A. In estimating the value of the property to be expropriated, the basis of assessment shall be the value which the property possessed before the contemplated improvement was proposed, without deducting therefrom any amount for the benefit derived by the owner from the contemplated improvement or work.
B. The owner shall be compensated to the full extent of his loss. The court shall include in its consideration the difference between the rate of interest of any existing mortgage on an owner-occupied residence and the prevailing rate of interest required to secure a mortgage on another owner-occupied residence of equal value.