Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Built Environment (hierarchy name)
4. Single Built Works (hierarchy name)
5. single built works (built environment)
6. [single built works by specific type]
7. [single built works by function]
8. residential structures
9. dwellings
10. houses
11. [houses by location or context]
12. [houses by location: topographical]

Anotations

Scope note:

Houses, common during the prehistoric periods of many cultures, whose floors are dug out deeply below the adjacent ground level. Use "sunken huts" for multipurpose buildings of the first millennium CE, found in England and throughout northern Europe.