I think is a bug because it didn't happen with the other doors in the same floor.
Staircases can also be pushed and pulled sideways to be as long as the lot itself. For instance, staircases can be placed in the same place as half walls that are shorter than the platform as these half-walls do not intersect with the interactable areas of the staircase. If you place a half-wall directly in front of a platform, you will not be able to place a fence on top of that area of the platform. Placing a platform on top of your contemporary houses will make the build look that bit more realistic. The stairs placed fine on the original build. 'Can't intersect other objects,' huh? Sims 4.
Sims 3 Basement Stairs Blocked By Wall On JanuBy Amik Tutorial using platforms in the sims 4 the sims 4 building stairs and basements gl block stairs ideas houzz real basements Yes, I have CC, yes I have mods, no that's not the problem (I got so desperate I did the whole 'move sims 4 folder to desktop for fresh game thing, removing ALL … 4. Platforms can be placed in any room, at any height. Although you are able to use stairs and ladders to connect platforms of all heights, if there is only one step between two platforms, or between a platform and the floor, your Sims will be able to move between the two areas without the use of a staircase or ladder.