Top Floor of an Apartment Building, It's Expensive

This page is the CodyCross answer for the clue below from Pet Shop, Group 345, Puzzle 4 (Guinea Pigs).

Question is: Top Floor of an Apartment Building, It's Expensive

and the answer is: PENTHOUSE

Word Meaning:

PENTHOUSE — (now historical) A structure or annexe (especially one with a sloping roof) extending from the side of a building, sometimes as protection from the weather.

Definitions from Wiktionary.

Top floor of an apartment building, it's expensive — CodyCross Answer | CodyCross Solutions