Can someone direct me to a list of items that will block house placement? I just restarted an old account of mine and I want to place a house directly beside my already existing plot to make it look like one large house. I know of the obvious items that will block house placement. Uneven land,trees,large rocks and mountain sides. The only thing that is 'blocking' the placement next to my place could be mushrooms? Of all the items that are keeping me from placing my houses together are mushrooms? Please say it isn't so.