S2·E16 The Magic Cabin

Samantha and Darrin decide to go away for a few days. Larry suggests that they stay at his cabin, which of course, is run down and decrepit. With the help of magic, Samantha turns the eye-sore cabin into a glamorous, to-die-for dream house. It catches the eye of a prospective young couple, and they insist on buying it. Darrin is mad at Samantha and makes her change it back to the eye-sore it once was, but Sam makes the couple seem like they are looking at a beautiful house.