For a player to implement a "More Floors" mod, the workflow typically involves:
If you want playable height without the mod:
If the 5 floors above ground and 3 basements are not enough for you, or if you want to create a "shell" building (like a fake high-rise), there are mods that help: sims 4 more floors mod work
If you want more functional floors without breaking your save file, the community consensus is to build down, not up.
The Sims 4 actually allows 4 basement levels (-1, -2, -3, -4) plus the ground floor plus 4 upper floors. That is 9 functional floors total (4 up + Ground + 4 down). For a player to implement a "More Floors"
How to get 5 upper floors using the basement trick:
This illusion is how creators like SimsLuxy build those massive 10-story apartment videos without corrupting their game. If the 5 floors above ground and 3
If you want to go deeper, the game also updated this natively.
While the script determines if a floor can be added, the XML tuning files determine how the UI behaves. The build mode user interface has hardcoded graphical elements for floor selectors. Early versions of this mod succeeded in adding floors but failed to update the UI, resulting in the 6th floor button overlapping the 5th or appearing invisible.
Sims cannot autonomously navigate past roughly 6–8 floors.
They may route fail, freeze, or teleport. The mod is best for shell builds, apartment-style shells, or decorative skyscrapers – not fully playable homes on floor 15.
If you want the feeling of unlimited floors without the headache, install these mods instead: