okh's suggestion sorted out my problem. I had previously tried to export my stairs to an OBJ file and selected Staircase but it didn't work. I now know that the stairs have to reach exactly to the ceiling in order to make them show. Thanks for your help everyone.

Thanks bdfd.
Creating the stairs isn't the problem but being able to see them when I add the next level up is.
Not sure how I add a photo on here but if you can give me some help I'll post it.

<t>Hi everyone. I'm new to Sweet Home 3D but loving the programme so far but I wonder if I can get some help?<br/>
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I've tried to model some floating stairs but creating blocks and locking them up against the wall. The problem I'm having is that when I model the next level I can't see the ...