In The Sims 4, players can get more slots in their households by completing challenges. Completing these challenges will give the player rewards, such as more slots or new objects that can be used in the game. There are also a number of ways to get additional slots in households. Players can purchase them with Simoleons or points earned through gameplay.
Additionally, players can create a new household and invite friends who also have The Sims 4. These friends can then add additional slots to the household. As players progress through the game, they will earn more slots and objects that they can use in their homes.