n. — North American in origin, Housing
a small hotel room or apartment with kitchenette and bathroom.
Type: 5. Frequency — The term is a positive name for a very small dwelling. These “units” are typically smaller than one-room apartments with full cooking and washing facilities (Canada: bachelor apartment, US: studio), and appear most frequently in Canada, followed by the US (see Chart 1), where efficiency apartment is the term of choice.
See also COD-2, which labels the term" Cdn (esp. US efficiency apartment)", Gage-5, s.v. "efficiency apartment", ITP Nelson, s.v. "efficiency apartment".
See also: bachelor apartment two-and-a-half
- 1961  A reasonable vacation, efficiency units, white sand beach on Longboat Key.
- 1968  ANNOUNCING THE OPENING IN GUILDWOOD VILLAGE - modern new fully furnished (efficiency unit) to suit adults. 
- 1985  Eight large, fantasy rooms in this inn include efficiency units, a feature now of more than half the town's motel rooms and, of course, all the condos. 
- 1990  Mostly efficiency units with kitchenettes, they'll be refurbished and brought up to "superior small-lodging" standards - good vacation buys for budget-conscious family travellers seeking clean, comfortable accommodation at reasonable rates. 
- 2001  I was widowed last year and sold my large home to move into an efficiency unit in a seniors' complex. 
- 2007  By that evening, we had pulled onto Route 501 and into a Myrtle Beach Piggly Wiggly supermarket so that Margaret could stock our hotel "efficiency" unit with cereal and bologna. 
- 2013  In the initial phase, the development of Portofino Street - yes, it's actually called that - included the building of the Waterfront Shaw, an efficiency unit hotel, and a handful of promenade eateries, including Granma's Homemade (a bakery) and The All American Diner, mixing now the Italian seaside theme with '50s Americana. 
- 2016  A business permit to operate an efficiency unit at 1 Evans St. was approved during the planning and development committee report. Approval is subject to permission by all applicable government departments. 
Images:
Chart 1: Internet Domain Search, 21 Sep. 2012