A major advantage of a single-story townhome is that it is often more energy efficient than multi-level floorplans. However, a single-level townhome may lack the clear separation of living and sleeping areas that homes with more than one level have.
Single-story townhomes are typically more energy-efficient than their multi-level counterparts because heat rises. This is the reason why the upper floors in a house tend to be warmer than the downstairs areas. However, in a single-level townhome, the heat hits the ceiling and begins to spread out into the other rooms in the home. This can help the homeowner save on energy costs.
Single-level townhomes are also advantageous for people who have mobility limitations. Instead of having to walk up and down the stairs, everything is on one level, which makes it easier to maneuver around the home.
Visitors to a single-level townhome may have easier access to the bedroom and the other more personal areas of the homeowner's living space in a single-level townhome. A townhome that has more than one floor creates an immediate barrier to the homeowner's personal living space or private areas because guests have to use the stairs to get to the private living quarters.