Yes, HABITATIONS is a Scrabble word!

Letter values in Scrabble US: H 4, A 1, B 3, I 1, T 1, A 1, T 1, I 1, O 1, N 1, S 1.

Is it a valid word?

HABITATIONS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

the native habitat or home of an animal or plant
housing that someone is living in
the act of dwelling in or living permanently in a place (said of both animals and men)

Also: dwelling house.