If you are demolishing your house to place a larger plot, remove EVERYTHING from the house. If you drop it and let the contents drop to the ground, there's a chance that it will disappear when you place a plot back. The GMs will do nothing to help you. This came as a surprise to me since I've had issues in the past with items being lost with house placement and GMs have helped. Just wanted to warn everyone so you don't lose a ton of nice stuff like I did.