N.J. Stat. § 18A:20-12
If any building upon the property so devised is or becomes old, dilapidated and greatly in need of extraordinary repairs, or if any such building is not well adapted or becomes not well adapted for business or other purposes for which it was built, or cannot be repaired or modernized so as to yield a good income without extraordinary expense, or when a fair rental, considering the value of the property, cannot be obtained for the same, or when the premises consist in whole or in part of vacant lots which cannot be rented for a fair price or at all, and when if sold the proceeds arising from the sale of the real estate could be invested and in that way yield a larger income than could be obtained by the renting or other use of the premises, then the board of education may institute a civil action in the superior court to direct such lands and other premises to be sold in fee simple absolute. The court may proceed in the action in a summary manner or otherwise.
N.J.S. § 18A:20-12