You need to plan before you move things around in your town as the game limits you to how many times you can do it. You will only be able to move a maximum of two buildings per day unless you have purchased the premium access to the game.
Only being able to move two buildings per day should not be a problem if you have been planning your town properly but before you do decide to move any buildings it is important that you check all the positions to avoid unintentionally breaking any of the existing combos you already have in place.