Cape Cod: Some of the first houses built in the United States were Cape Cods. The original colonial Cape Cod homes were shingle-sided, one-story cottages with no dormers. During the mid-20th century, the small, uncomplicated Cape Cod shape became popular in suburban developments. A 20th-century Cape Cod is square or rectangular with one or one-and-a-half stories and steeply pitched, gabled roofs. It may have dormers and shutters. The siding is usually clapboard or brick.
Contemporary: You know them by their odd-sized and often tall windows, their lack of ornamentation, and their unusual mixtures of wall materials--stone, brick, and wood, for instance. Architects designed Contemporary-style homes (in the Modern family) between 1950 and 1970, and created two versions: the flat-roof and gabled types. The latter is often characterized by exposed beams. Both breeds tend to be one-story tall and were designed to incorporate the surrounding landscape into their overall look.