A basement apartment or basement flat is an apartment located below street level, underneath another structure—usually an apartment building, but also homes and businesses. Cities in North America legally define them as an accessory dwelling unit or "ADU".
A basement apartment or basement flat is an apartment located below street level, underneath another structure—usually an apartment building, but also homes and businesses. Cities in North America legally define them as an accessory dwelling unit or "ADU".
Source: Wikipedia "Basement apartment" · CC BY-SA 4.0
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