Where the স্নানঘর belongs
Bathrooms and toilets are the rooms the tradition most wants kept away from the protected corners — not because of the compass alone but because of water, waste and the drainage that follows them. Where they cannot be moved, the remedies are about containment.
Best placed in the পশ্চিম · বাযব্য
পশ্চিম. West is one of the two placements the tradition is comfortable with for a bathroom — it takes water and waste without disturbing a protected corner.
বাযব্য. The north-west is the classical bathroom corner: the direction of movement and of things that pass through, which is exactly what a bathroom is.
Kept out of the ঈশান · নৈঋত্য
ঈশান. A bathroom in the north-east is the fault the tradition treats most seriously, because waste and drainage sit in the corner every school asks to be kept clean and light. Where it cannot be moved, the remedies are containment: the door kept shut, the space scrupulously dry and clean, drainage checked, and no worship on the other side of that wall.
নৈঋত্য. A bathroom in the south-west puts drainage under the corner that should be heaviest and most settled, which the tradition reads as leakage from the household’s foundation. The usual remedies are keeping the room dry and closed, and restoring weight to the south-west elsewhere in the plan.