Who is liable for non disclosure of non permited build out?

[Jennifer Niez]

If an owner user purchases an office building with a non permitted built out second floor mezzanine, what if any recourse might they have for non disclosure against the listing  or procuring broker? Is there a stature of limitations from the time of the closed transaction? Will the investor still be able to obtain a certificate of occupancy since they purchased the owner user building "As Is" with no further build out required?

[Matthew Paul]

How does anyone know if an addition , or a bathroom remodel or a commercial build out was done with out a permit ? 

The only way is to go to the permit office and check for permits issued for that property . 

agents dont do this , brokers dont do this , home inspectors dont do this .  Buyers need to do this themselves .