Key West style house plans typically feature raised foundations, shady porches, and numerous windows to allow the air to move freely throughout the house. Oftentimes, Key West style house plan will feature a cupola to release warm air and an open concept floor plan.
Blog Cabin 2013: Entryway Pictures: Three risers, installed in the landing, tighten the footprint of the staircase's vertical shaft. The open design of the oak and hickory structure allows sunlight to stream down from second-floor spaces, including a vintage-style cupola. From DIYnetwork.com