While there isn't always a single "plug-and-play" script mod that safely changes the hardcoded user interface permanently without breaking during game patches, the most reliable tool for advanced building is by TwistedMexi.
How to Add a Fifth Story to Your Build in Sims 4 | Tips and Tricks
Only download mods directly from the creator's official website or trusted platforms (like Patreon or CurseForge). Avoid third-party re-upload sites that may host outdated files.
You do not always need more floors to make a building look massive; sometimes you just need taller floors. sims 4 build more than 4 floors mod
Normally, split-level homes are hard. With unlimited floors, you can have a living room on Floor 1, an office on Floor 2 (half a wall up), and a dining room on Floor 3 (another half wall up), creating a stepped amphitheater effect without cheats.
Once you have your extra floors unlocked, keep these tips in mind to keep your game running smoothly:
While there is no official "single-click" mod to change the game's hard-coded floor limit, you can build up to 10+ levels While there isn't always a single "plug-and-play" script
Rendering extra floors requires significant CPU and GPU power. If you experience framerate drops, reduce the number of windows and high-polygon clutter objects on the uppermost floors. Final Verdict
Every floor generates new data for lighting, shadows, and routing. On a mid-tier laptop, building a 20-floor apartment will cause time to freeze, Sims to stand still for hours (in-game time), and potentially save corruption.
Download the mod strictly from the official creator platform (like TwistedMexi’s Patreon or website) to avoid malware. Extract the Files: Unzip the downloaded folder. You do not always need more floors to
TwistedMexi has occasionally released specific scripts targeting the floor limit directly (such as expanding builds to 5 or more stories). If you look for these, always ensure you are downloading the version explicitly updated for the current game patch, as outdated versions will cause your game to crash on launch. Method 2: The Vanilla "No-Mod" Height Trick
If you want to exceed the standard height limit, you can use these community-tested methods: