We hired a roof contractor to repair the roof. The contractor did a bad job caused the whole ceiling drop which caused huge damage for the building and damage for tenant's property. Because the delay of the contractor the city found another contractor to finish the repair work. We filed a court case to sue the contractor for the damage he caused by the bad job he did. The contractor put a lien on my property.
I would need a bit more information to provide useful counsel. For liens, NJ has different laws for public, private and residential properties. If you have already filed suit against the contractor who liened your property, you should probably file an amended lien which seeks to strike the improper lien.