I have been going through some of my old, old recipes. I haven't made a gingerbread house for many years but I thought I would pass along this tip.
If you want your gingerbread house to look a bit different, you can make a "thatched" roof with bite-sized shredded wheat. The sugar-coated ones will look like snow on the roof.
I used to make my houses with an exterior "rock" chimney and or stone "foundation", faced with Brazil nuts and macadamia nuts cut in half.