You can edit your town by going into the options menu (where you save your game etc) and clicking Edit Town. There is also software that is available on the Official Sims 3 website which enables you to create a town from scratch.
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You have to enter a game and then hit the ... button and then hit "edit town". Good luck!
Edit town mode is not in any sims 3 xbox games. Its only on computer.
click on the options button and click on edit town and click on your house and drag it to the bin or its already on the bin
on the bottom of the screen there is a button with three dots on it. You press it and go to edit town. Whoever wrote that up there forgot to tell you u must be in map view to do this!
As far as I know, there is no edit town mode in any console versions of The Sims 3. This is only in the PC version.