New Jersey's Construction Lien Law gives contractors, subcontractors, and suppliers the right to file a mechanic's lien when they are not paid for work on a property. This guide explains who can file, the strict filing deadlines for residential and commercial projects, and what property owners can do to protect themselves. Peter J. Lamont, Esq. breaks down the key requirements under N.J.S.A. 2A:44A-1 et seq.