mansionette
nounUK /ˌmænʃəˈnɛt/
US /ˌmænʃəˈnɛt/
A mansionette is a small apartment that looks like a little house.
They rented a cozy mansionette on the second floor of the old building.
OTHER MEANINGS
2. A small house or a self-contained part of a larger house, often on two floors.
The mansionette had its own entrance and a tiny garden.
3. A dwelling with rooms on more than one level within a larger building.
Their mansionette came with a spiral staircase to the bedroom.
4. A modest, house-like residence attached to other units.
The street was lined with mansionettes built in the 1930s.