Modern This style includes both mid-century modern and 1970s contemporary. The mid-century modern style dates back to 1940-65, especially in the Los Angeles area. Most homes were one-story, with clean, simple lines, a minimum of decoration, lots of glass and a flat or angled roofline. Sleek carports, indoor/outdoor living spaces and open floor plans are also hallmarks of this style. The 1970s contemporary group includes split-level homes and homes with vertical siding, clean lines and sweeping rooflines.