The phrase "penthouse floor" refers to the highest level or top floor of a building where the penthouse, or luxury apartment, is located. Full definition
suite on Penthouse Floor, expansive windows, goose feather bed & pillow, separate comfortable sitting & work area. (sofitel.com)
The views are awesome from the 2nd, 3rd and Penthouse floor with the latter offering a full 360 degree view of the island and Caribbean Sea. (costamayabelize.com)
Located in Harbour House New Wing, these rooms offer partial views from the lower levels at the front and penthouse floor at the rear, with kitchenette. (travelground.com)