Here is the information you need to get more floors working in The Sims 4.
Here's a step-by-step guide on how to use the mod:
The Sims 4 features a restrictive build mode limitation, capping structures at five above-ground levels and three basement levels. This constraint has long hindered architectural realism within the game. This paper examines the technical methodology behind "More Floors" modifications—specifically focusing on the manipulation of Python scripting and Tuning (XML) files to override the global build height variable. It explores the stability of the game engine when pushed beyond intended limits, the implications for user interface (UI) rendering, and the necessary compromises required to implement vertical expansion.