Southwestern style house plans reflect a rich history of Colonial Spanish and Native American styles and are usually one story with flat roofs, covered porches, and round log ceiling beams. This mode is very similar to the Santa Fe style, but is a broader, more inclusive term. Southwester floor plans tend to be asymmetrical and invits discovery with interesting alcoves, spacious living areas and a fluid floor plan that's ideally suited to modern family life. Built-in seating (also called "bancos",) kiva or beehive fireplaces, and door-less showers are distinctive features. Walls of Southwestern homes are often stucco or stone and have overhangs or trellises to provide shade from the desert sun. Southwestern style house plans range from adaptations of the Prairie style to modern versions of early Adobe architecture. The clean straight lines and the smooth rounded corners of Adobe style homes are adapted for many contemporary Southwestern designs.
A helpful idea book for getting a Southwest look for your interior is The New Southwest Home: Innovative Ideas for Every Room, by Suzanne Pickett Martinson (Northland).