The left side  Sunnyvale Bank owned home garage converted to a big living room. The right side of Sunnyvale REO home garage coverted to 2 bedrooms and 1 bath. The non-permitted construction is an issue in any home sale. The bank owned home sellers do not disclose anything and it will only sell it “AS IS” condition also. On top of this some lenders don’t even give loan to  the homes with non permitted construction, so many those homes end up sold to the all cash buyers. 

The new buyers will assume all the responsility. If the neighbors complain to the city for this addition. then  the city  building code inspector  would decide if the structure stays or goes. Some of the cities will require the buyer to convert the garage back as an orginal garage. Some cities will allow you to  retrofite up to the current building code and issue you a code compliance.

Buying a Unpermitted alternation homes do have some risk involved.