The Beatles album covers of both 1962–1966 (Red) and 1967–1970 (Blue) showed The Beatles, looking down from a stairwell in the EMI’s Manchester Square headquarters in London. They used the same pose, camera angle, setting and photographer (Angus McBean).
The earlier photo (Red Album) was taken from the same session that produced the one used on their first album, Please Please Me (1963). The later photo was originally shot for the Get Back album, which later became Let It Be, but in the end the photograph was not used for that project
Here’s the balcony and some pictures of The Beatles with George Martin the day of the first shoot.
The building is located at 20 Manchester Square London W1U, UK. It has since gone through renovation and now looks like this.