This show is based on the popular Archie's Comics series, Sabrina. This is not the first live-action project of Sabrina, either. There was a television show in the 1970's and before this show, there was a movie, with Melissa Joan Hart as Sabrina.
Sabrina and Salem are the only two characters to remain on the show throughout all consective seven seasons and all three made-for-TV movies.
The address of the Spellman home in Westbridge is 133 Collins Road.