New Jersey Statutes Title 39. Motor Vehicles and Traffic Regulation 39 § 4-56.6

No person shall park or leave unattended a vehicle on private property without the consent of the owner or other person in control or possession of the property or for a period in excess of that for which consent was given, except in the case of emergency or disablement of the vehicle in which case the owner or operator thereof shall arrange for the expeditious removal of the vehicle.  This section shall not apply to manufactured or mobile homes left unattended and for which there exists or existed a rental agreement to occupy a space on the property.

Subject to the requirements of section 7 of P.L.2007, c. 193 (C.56:13-13),  the owner or other person in control or possession of the property on which a vehicle is parked or left unattended in violation of this section may remove or hire another person to remove and store the vehicle.   It shall be the obligation of the owner of the vehicle to pay the reasonable costs for the removal and for any storage which may result from such removal before he shall be entitled to recover the possession of the vehicle.  If the owner of the vehicle refuses to pay such costs or fails to make any claim for the return of the vehicle within 90 days after such removal, the vehicle may be sold at public auction in accordance with the provisions of N.J.S.2A:44-20 through N.J.S.2A:44-31.