outroom

noun2

1. •
   An outer room.

   • If our Artist lodgeth her in the out-rooms of his soul for a night or two, it is rather to heare then believe her relations — 1642
2. •
   A small (but possibly consisting of multiple rooms) outbuilding, such as a shed or sleepout.

   • The household who occupies the outroom may by connected to the main occupier of the premises by employment, but not necessarily so. — 1963