Dormer is windows. Totally just decorative.
Shed is being built by "Better Built Sheds". The last couple of years they have been expanding the cute feature options on their sheds. (they used to be just very plain structures). Now you can add window boxes, shutters, dormers, french doors to give it a more custom look. The interior will be unfinished, however. I'm hoping to eventually insulate it and put up white beadboard walls. maybe black and white checkered floor tile. Not super original, but I love that country cottage look. I've already spent way more than my husband was expecting, so the interior may have to wait.