A basic division is between free-standing or single-family detached homes and various types of attached or multi-family residential dwellings.
[12] A cottage is a small house, usually one or two stories in height, although the term is sometimes applied to larger structures.
A ranch-style house or rambler is one-story, low to the ground, with a low-pitched roof, usually rectangular, L- or U-shaped with deep overhanging eaves.
[13] Ranch styles include: An I-house is a two or three-story house that is one room deep with a double-pen, hall-parlor, central-hall or saddlebag layout.
It has two nearly equal sections that are located on two different levels, with a short stairway in the corridor connecting them.