Illegal 3rd unit in a legal 2 unit house

[Karen Griffith]

Question: I am looking to purchase a 2-unit house with an illegal 3rd unit. Upon purchase will the illegal unit need to be removed? In the case that I was not looking to rent the illegal unit and place a family member in the unit does it still need to be removed, this will initially be an owner occupant purchase.

Secondly, what is the average cost of permits to make the unit legal in New Jersey.

Thank you in advance