N.J. Stat. § 27:16-42
If the board cannot acquire the real estate, or any interest therein, necessary for the making of any improvement authorized by this chapter by agreement with the owners thereof, the compensation to be paid therefor shall be ascertained and paid in an action in accordance with chapter one of Title 20 of the Revised Statutes except as hereinafter provided. In the action the Superior Court shall determine the benefits conferred and damages sustained by each person in interest by reason of the taking of the real estate or any interest therein. The court shall consider the condition in which each parcel will be left and the benefits that will result from the improvement to the owners thereof. The costs, fees and expenses of the action shall be paid by the county treasurer.
N.J.S. § 27:16-42