Castiel's house is humble indeed as many of the rooms are barely furnished and many of the walls inside have painted symbols on them. Also empty bottle are clustered around the house, as cleanliness is obviously not a priority in this home. There are three bedrooms upstairs with a bathroom, the bedrooms each have a bed but that's more or less it. There's also a messy empty kitchen (Cass doesn't really eat) a living room and another bathroom. The basement of the house holds all his treasures but Cass keeps it locked and sealed with a spell. The most used room in the house is the study, which is hoarded with books, pipes, bottles, bowls, knives and other unusual items scattered around. This room has a desk, chair and couch where Castiel crashes.