I created my basement below ground level... simple enough. Then I had to remove all the dirt at the back of the house to have the basement visible. Again, simple enough, although leveling is not easy...But I made it work. Now the problem is when I try to add items, ie... landscape items, decks, pool, etc.. I cannot get the items below ground level. Everything sits at the street level, in mid air(but remember this is at the back of the house and all these items need to be "below" street level (-9'). I don't know how to correct this. thank you for any help.