Bring in the cad file of your room. It’ll be easier to model the room in rhino from there. I separated the file into layers. (north, south, east west, etc.)
Use RemapCplane to orient the elevations. Select the lines (I.e. north elevation) in the Top view – “RemapCplane” – click into the viewport you want to set the elevation on (I.e. front view). Use Move tool to place the elevation where it should go.