The house that Jeannie blinks into the vacant lot is the same house that Endora puts in a vacant lot in Endora Moves in for a Spell (1966). The difference is that this episode was filmed and aired a full year before the Bewitched episode.
The house Jeanie conjures up in the vacant lot across the street is the house used for the Steve Baxter family during the 5th and final season of Hazel.