House gnomes live in old houses. The males wear red caps and blue shirts like house gnomes, and although I do not know for a fact, I suspect the females wear the same clothes as the forest gnome females do - dark green skirts and hats, and pale shirt with red decorations. It is quite lucky to have a house gnome, and you very well may have some in your house! As long as you are kind, they might reward you, and even if they do not, you will probably have no trouble with them. They may, however, play tricks on you, as gnomes are mischevious creatures. Gnomes, unless they are Siberian gnomes, are not malicous and will not harm you. You can befriend them by leaving out litttle gifts such as milk, clothing, etc.