So I would like to upgrade my condo by removing the ceiling drywall, adding double drywall with GG to the underside of the above floor, and attaching the new ceiling to the furring channel with whisper clips. I spoke to the condo mgmt company, and the guy in charge told me this was not the kind of "structural" work that I'd have to apply for a building permit for (from my township). Personally, I wonder if he's trying to sneak this by the township. If I do this through the township, I would have to apply for a building permit(I think $100 fee), have an "engineer" develop a written document (probably costs a bit of money), submit a letter from the condo association, and use a licensed contractor. The drywall guy I was going to use is very experienced with drywall but not licensed. It seems like a lot of work for something like this. Should I just go with the advice of the management company (the guy has a reputation for being a bit shady) or do I go through the longer and more expensive process?