N.J. Stat. § 30:4-19
The board of trustees of an institution within the state, not owned by the state, for the reformation of juvenile delinquents may purchase and acquire such additional real estate as may be necessary for the proper accommodation, employment or welfare of its inmates. When the institution is supported and maintained by a city, the consent of the governing body of the city shall first be obtained. Such additional real estate shall not be acquired unless full provision shall have first been made for payment of the cost either from the current annual appropriation for the support of the institution or from the earnings of the inmates or both.
Such additional real estate shall be purchased and held in the same manner as the real estate originally acquired for the establishment of the institution.
N.J.S. § 30:4-19