For our family in the past, the time going door-to-door was largely restricted by kidâ€™s bedtimes and/or how much candy we actually wanted them to have. As for handing out goodies at our home, that is governed by when we run out of handouts or simply want to stop. After a point that we determine, we turn out the lights and ignore the front doorbell.
Iâ€™m not aware of any city guidelines or restrictions.
Is Trulia going to be handing out goodies in San Francisco? :)