Does anyone know where in the Fannie Mae guidelines it states that gross living area must have interior access? From what I read in the selling guide it doesn't outline it specifically. We are appraising a home with living area above an attached garage that has access from exterior stairs. It is a large room (used as an office) with a bathroom that has the same level of material and finish work as the home and is fairly typical for our market area. County records value it as GLA. The city is closed today so can't verify what the building permit lists it as. In our opinion, the contributory value would be consistent with that of the GLA. Thank you in advance for your assistance.