I am trying to design an addition, connected by a breezeway, to an existing complicated structure. This building, or rather connected group of buildings, sits built into a hillside with retaining walls. There is a flat area on the site onto which we would like to build a tall, tower like, addition. I cannot seem to get started on it. If I draw walls and adjust the floor heights to match where it's going to connect the existing building, I can create a first floor but I cannot get the program to generate additional floors. I will attach a PDF overview for starters. Anybody with an idea about what's wrong I would be greatly appreciative to hear from you. The proposed site is the flat area between the greenhouse and the other buildings.
Thank you, Henry
Proposed site overview.pdf