Existing Unpermitted Additions

[Josh Bowser]

Hey BP rehabbers,

I came across a house that has roughly 400 square feet of existing, unpermitted additions that does not show on the tax records. 

Has anyone had success of getting these unpermitted additions approved and added to the tax records during a rehab? An extra 400 sq ft in this neighborhood is worth ~ $80k which is a significant way a client can add value. 

Interested to hear anyone's thoughts and things to avoid on this - thanks!