The number of complete floors located entirely underground.
This count indicates how many levels exist beneath the ground surface, which may include basement areas, parking garages, or other subterranean spaces.
| Median | Mean | Mode |
|---|---|---|
1 | 1 | 1 |
| Location | Median | Mean | Mode |
|---|---|---|---|
| Unknown | 1 | 1 | 1 |