Most houses already have a room or two when they are built but some add more rooms whenever needed and possible. It may be a room for a new baby, another member of the family or a room for storage. In some cases, there are houses that can add a room at the side when there is still space on the lot. It can be used for guests or visitors. The garage can also become a room or, after a bit of remodelling, a room can be built on top of the garage. There will be some changes when a room is added but it can look as if there is only an additional door depending on its design.