Why is my bathroom floor raised up very high?
In some older homes built between 1900-1930's it was common to set the ceramic tile in a bed of cement. The cement was poured over the subfloor. While this was a great stable base for the tile it did raise the floor. You may also have a case where the floor was damaged and during the repair or remodel they added additional layers of plywood or tilebacker to form a base for the new tile.