casita

plural casitas

1. USA small, attached but self-contained house or apartment.

   Last fall, construction began on the new spa building with […] about 30 two-bedroom, free-standing casitas.

   2007 May 11, Nick Kaye, “Icon Vallarta and Pronghorn”, in New York Times

   1 more example

   AARP, the research and advocacy behemoth, has begun aggressively promoting the spread of these units, often referred to as casitas or, more cheekily, granny flats.

   [2023 September 6, Michelle Cottle, “The Magic of the Granny Flat”, in The New York Times, →ISSN

   Synonyms: mother-in-law apartment, granny annexe