Press [Ctrl] + [Shift] + C to display the console window. Enter one of the following case-insensitive codes to activate the corresponding cheat function. Note: On Vista you may need to press [Ctrl] + [Windows] + [Shift] + C to display the console window. Note: The codes for the original The Sims 3 can also be enabled.

Effect	Code
New basement tools	buydebug
Toggle objects allowed on roofs	allowObjectsOnRoof [on or off]