Every time you level up, you will gain access to more rooms of the manor. However, you will need to pay the Addams coin fee and wait the allotted time before the room actually opens to be used. While you are waiting, why not fulfill some desires or perform more actions? Once the room opens up, you will gain access to new quests and most importantly a new crafting station. Most of the rooms have a new crafting station that must be uncovered when the room is unlocked.