Quote from @Sophia Boro:
There are obvious benefits to acquiring properties that have permitted work, but I want to see if anyone can explain why some folks allow unpermitted work. My curiosity includes how timeframes are affected, the listing price of the home, quality of work etc.
Anyone have any insight?
I am uncertain if you are wondering why people would buy property with (known) unpermitted work or if you are asking why they would choose to not permit work they do after they buy the property.
If it's the former, then I assume the purchase price reflects a discount great enough to overcome the headache of getting retroactive permits. This would mean that they have also done their due diligence in knowing it could get permitted by having a GC and/or inspector come out and look at the property to make sure it is up to code. In some cases, the price may justify redoing the work up to code.
If it's the latter, then I believe that was answered above. Permitting takes time and time is money. You can get unpermitted work for much cheaper through specialty subcontractors that are unlicensed (usually because of immigration status). Their work can be quality work, or it can look like quality work but not meet code, you roll the dice. We haven't even touched on the safety and liability concerns. This is where a licensed GC who will pull permits pays for itself in peace of mind alone.