Radical 户
8 strokes
door 户 (269) + direction 方 (291) = house 房
This can also mean a room, as well as referring to a complete building.
[房子 (17) fángzi house]

You knock on the door to ask directions to your friend’s house. / The fairy opens the door and casts a spell on Fang the dog to enable him to show you the way.