What to do with unpermitted additions

[Kevin Mabry]

Good afternoon. My wife and I are new to real estate investing and have been actively looking for our first deal. I have some construction experience (but no expert) and on several of the houses we have looked at, I suspect a patio enclosure or addition has been added without a permit. Most do not have HVAC. Do you go to the city to verify a permit was pulled? Do you demo the addition/enclosure and take a hit on the square footage? Or just move on and rehab the enclosure?

Thanks in advance for sharing your knowledge/experience. We look forward to getting more involved in the forums. 

Kevin