I dunno 'bout no New Jersey laws, but in most states your own place of business is considered to be equivalent to your own home.
(For instance, a taxi is a "place of business," according to some states' laws. Even in those states which all but forbid concealed carry, for instance California, a taxi driver may have a concealed weapon in his cab without the necessity of obtaining a concealed-carry license.)
(For a further example, if you live in a rented apartment it is nevertheless considered to be your own home, so, by extension, a rented business premises is equally your own business premises, just as if you owned the building.)
Just to be safe, however, I strongly suggest asking your business lawyer for an answer to your question.
I am not a lawyer, nor do I know anything about New Jersey law, so my opinion is not to be relied upon.