A 1.5-story house, sometimes known as a one-and-a-half-story house, is a detached home with a second floor that is roughly half the size of the main floor but is off to one side. A 1.5-story house can be any length from 20 feet to 200 feet, but it usually does not exceed 100 feet. They are different in how they are constructed and what they look like outside. The three most common types are the split-level house, the raised ranch house, and the French provincial house. The split-level house has two levels separated by a basement. This type of house was very popular during the 1940s and 1950s. There is no waste space between the rooms on each level. The kitchen, living room, and other amenities are all on one floor. The upstairs rooms have open views of the surrounding area. This type of house is easy to maintain because there are no walls between rooms, so you can move items around as needed. The basement also serves as a utility room and storage area. The raised ranch house has two floors with a baseboard wall between them. This type of house was popular during the 1920s and 1930s. It resembles a cottage with its front elevation facing the street.