Spinners End

Spinner's End was the street on which the Snape family lived prior to the first wizarding war, It is unknown what happened to Eileen and Tobias Snape however they most likely died between the time Severus Snape started Hogwarts and the time Narcissa Malfoy and Bellatrix Lestrange visited him there in the summer of 1996.

The house has a hidden passageway behind a bookcase in the sitting room from which an upstairs room can be accessed (most likely added after Snape took up permanent residence there)

The street is probably located somewhere in the Midlands or the North of England as a disused Mill is mentioned. It is also close to where Lily and Petunia Evans grew up as they both knew the street and played in the same park as Severus Snape.