User blog comment:LostInRiverview/The Sims Wiki News - 29th May 2014/@comment-24823972-20140529084541/@comment-4568327-20140529105523

The "setHighestAllowedLevel [number]" cheat is the one that allows you to adjust the height restrictions in The Sims 2. You can also go up one more level by placing a dormer on the highest level. The technical limit is 16 floors. If you go higher than that, the game will crash.

16 is a huge difference from a pathetic three stories.