Split Level Home Interior?

[plewnes]

Is it possible to create a split level Home interior? What I would like to do is place a stairway and then elevate a floor to the top of those stairs. The main action of the scene would take place on the floor at the top of the stairs, with some action traveling down the stairs to the home's front door
which has a foyer. I could post an actual photo if it would help.

Thanx in Advance!
PLewnes