Location of Gidget's house- Santa Monica
The real home used for the outside of Gidget's movie house is at:
267 18th Street, Santa Monica CA.
Sometime around 1963, the house was replicated on the Burbank backlot ranch of Columbia Pictures. The blueprints were flipped and a reverse design facade was attached to an existing garage (the garage was often seen on the TV's "Hazel" 1961-63).
Starting in 1964, "Samantha" used the facade as her TV home on "Bewitched".
In 1965-66, TV's Gidget lived in another fake house on the backlot - but often passed/visited the reversed replica of the original Gidget home.
The Bewitched house aka "the reversed Gidget" house was later used for Gidget's TV residence on "The New Gidget" (1986-88).