It can happen immediately or if there is need to wait because the court order may give a date certain, then the time period the court order states. Check out your order and see if there is a date certain. Otherwise, the sheriff's posted notice should give a date and be prepared because it could happen during that period but not after that time period. If you need longer, you would be considered a hold over tenant and would still be responsible for additional rent. You should speak with your landlord about arranging a date certain to move to prevent forced removal by the sheriff's office.