When you get it, make sure it has been "finaled" by the city or county (not just taken out)
If you change it back, I would do that with a permit as well.
It may be worth seeing what the square footage of your home is in the public record. If it was increased due to a conversion of garage to living space, then most likely it was done with permits.
Bernard Gibbons, J. Rockcliff Realtors
DRE License # 01331583
Phone (925) 997-1585 - firstname.lastname@example.org