The Hollister Home is the home belonging to Mackenzie Hollister and her family. Because the Hollister's are quite rich (seeing how Mackenzie is able to go to private school), they were able to afford this house. Apparently, they live in a mansion with trees covering. Their house number is 77752.
The only bedroom mentioned was Mackenzie's. It was said to be Nikki's dream room, because of the TV, laptop, and other things. Mackenzie has a walk-in wardrobe, and her own bathroom attached to her room.