You can save your house IN a town as well. Build your house in "new game" using Edit Town mode for the build. So, let's say you choose Sunset Valley for your town. You would start at the main screen and choose New Game and then using the drop down box you would choose the town, in this case, Sunset Valley. When the opening screen for the new game shows up go directly to Edit Town mode. Select a lot, or place a new one if you want to, then build your house on that lot. Use Save As giving your town a new name, such as Sunset Valley1 or something. If you then want to play the game just go into it as usual, (Game Set Up I think it's called), but when you save that game you have to give it a new name and again, use Save As. That way you have a game you are playing and also a town with a new house in it that you can reuse. The key is Save As. I've been doing this in remodeling an entire town.