Flat modern family house plans frequently feature large expanses of glass (windows, doors, etc.). These simple, ornament-free house plans are often monochromatic in color and stand in stark contrast to a more traditional design, such as a red brick colonial. While some people are perplexed by the sight of a modern house floor plan, others can't get enough of them. It all comes down to personal preference. It should be noted that a Flat modern family house plan is not the same as a contemporary house plan. As previously stated, modern house plans proudly display modern architecture. On the other hand, contemporary house plans typically present a mix of today's popular architecture.