www.koolik.com Gary Slossberg from National Home Building and Remodeling Corporation shares ideas for floor plans for home additions, whether it be an additional bedroom, game room, or home theater. It is important to keep in mind how much home additions will cost, as well as determine what kind of additions will work best with the existing home. A common issue that may occur is when architects design a floor plan, it doesn’t always come out the exact way it was designed structurally.