One of the great things about The Sims 4 is that there is no limit to what you can do with your Sims' home. If you can dream it, you can probably build it in the game. So, if you're wondering if you can make a sunken room in The Sims 4, the answer is yes!
To create a sunken room, you'll need to first build a foundation for it. You can do this by using the Foundation tool in the Build Mode. Once you've placed your foundation, you can then start to build up the walls of your sunken room.
When it comes to decorating your sunken room, the sky is the limit. You can add in all sorts of furniture, appliances, and even swimming pools. Just make sure that you don't make the room too deep, or your Sims will have a hard time getting out!