A second 'level' of a room?

[Ge15t]

I am wanting to add a second 'level' to my current giant dining room, so that there is a little bit that overlooks the dining area that you can access via stairs in the same room. But for the life of me a cant figure out how to door the floor for this second level.

A plane is far too thin for the upstairs bit.. And I dont know what I could use to make this look like a real second story

[nofsky]

Use two planes, one facing upwards and one facing down spaced at how thick you want the floor to be, then use welder objects or more planes on the edges.

[Droopy]

A visual aid for us may also help us aid you back