It's best to have it a minimum of 2 wide because that allows 2 Sims to use the stairs at the same time and avoids pathing problems. Select which kind of stairs you want, whether you want the rails, and how wide you want it. Once you have enough space, go to Build Mode and click on the stairs of the house diagram. Remove all furniture, light fixtures, pictures, everything. You have to remove all objects that are in the area where you want to place the stairs. Sometimes the best place is next to a wall. They take up a lot of space, which you'll see when you try to place one. I'm not a building expert, but I've added second stories a few times.įirst of all, you need room on the ground floor to put a staircase.
