Don’t include in your design anything that requires the creation of a raised or sunken room. First, these designs are seldom used today. Second, changing the level of a floor is a major undertaking. You must consider not only the cost of changing the existing floor, but also the effect of the change on other rooms (above or below), the required stairs or ramps to provide access, and any potential effect on the structural framing of the house. Changes of this kind require careful analysis of the structure of the home, the weight-bearing function of the existing floor, and the effect on other parts of the structure. Creating a sunken room requires removal of all flooring, sub-flooring, and framing – probably with temporary supports to keep the roof from collapsing during construction. It will also change the ceiling height of a room beneath the area you are remodeling – this could result in a decrease in headroom that makes the space below the remodel useless. Raising a floor may not involve as many structural changes, but it will affect ceiling height in your remodeled area, and it will require some means of access, such as stairs or ramps.

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