mansionette

Etymology

From mansion + -ette. Doublet of maisonette.

noun

  1. A large and somewhat luxurious house.“In the smaller plans of a "Mansionette near Wimbledon Park," "Semi-detached Houses," and "The Compact House built near Blackheath," we are not favoured with any scale.”
  2. A flat that spans two or more floors, and often has its own entrance (i.e. not off a communal hallway).“gone to London to work and had left her mansionette flat empty. The mansionettes stood on high ground overlooking the docks.”