Dormer style with outside wall the same plane with the house outside wall (pic)

[matt.luthi]

Hi, I am very new to the software (Pro 2014) and have a particular style of dormer I want to achieve. I went through the user guide and looked at posts and examples but have not found the answer so far. I am hoping for someone to point me in the right direction... Please have a look at the attached image for an example. I cant work out how to have the outside wall of the dormer at the same plane as the first floor. Note that the first floor (above ground floor) has a wall which is only about 2/3 of the height of a standard wall in order to increase the available space.

Cheers,
Matt