N.J. Stat. Ann. § 2A:44-189

Except as specified in this subsection, the owner of a self-service storage facility or the owner's heirs, successors or assigns shall have a lien upon all personal property located at a self-service storage facility for rent, labor, or other reasonable charges due as specified in the rental agreement in relation to the personal property, and for expenses necessary for its preservation, or expenses reasonably incurred in its sale under this act. The lien provided for in this section is superior to any other lien or security interest except those prior liens established pursuant to N.J.S. 2A:37-20, sections 3 and 12 of P.L.1966, c. 30 (C. 54:32B-3, C. 54:32B-12) and R.S. 54:35-19 and those as to which the occupant has notified the owner in writing. The lien attaches as of the date the personal property is brought to the self-service storage facility.