It's usually attached to a side exterior wall. Double wide' manufactured homes are assembled from two units, joined lengthwise. Manufactured homes are built on a nonremovable steel chassis. They arrive on their own wheels. Look again at the sides of the structure.
Manufactured structures vary in design.
So although it's not a sure way to identify them, they often have less of a roof pitch than a 'stick built' home. Stick built homes are built to conform to all local codes at their final destination. Not all lenders will give mortgages for manufactured homes. And if they do, there may be some specific requirements. Lenders treat modular homes in the same way they do site built homes.