 CONT: In all establishing shots of the Huxtable house, it seen as  being in the middle of a group of houses, with fences on either side  of the front steps. In episode #2.21 ("An Early Spring") some scenes  take place on the Huxtables front steps. In these scenes, there is  a driveway the the left of the steps, and to the right of the house  there is an alley.