Which preposition to use with penthouse

of Occurrences 8%

A black chip hat shaded the glowing hair and the face, "ruddier than the cherry, and whiter than milk;" and the merry, dark blue eyes had a penthouse of their own, of drooping lashes, which redeemed the boldness of their frank and open gaze.

from Occurrences 1%

He counted the roofs dividing the penthouse from where Morris Street bisected the block.

Which preposition to use with  penthouse