Checking permits in NJ?

[Eric P.]

Wife and I are still trying to find our first investment..  We are going to look at one this Sunday, but there is a sunroom on the back of it and I'm wondering if it was constructed with proper permits.  Is there a way for me to check to be sure of this assuming we like everything else before putting in an offer?  If there are not permits is this a deal breaker?  How much of a headache or financial pain can this be?