Pictures please

Not sure how and why a 4 feet wide bathroom would be possible for new construction.

Sorry but actually i measured it properly its 5feet by 10.5 feet.

Thank you, Riddle Construction and Design, the measurment is 5feet by 10.5 feet, attaching an image. But due to some religious aspects i cant puth my toilet seat in a direction of east to west or vice versa it has to be in a direction of north to south or vice versa.
Please help

Based on the dimensions you have given and the religious aspects you mention you are very restricted in what the layout can be. The best solution I see means you have to move the door towards the south by 36". I suggest you make it a pocket door retracting towards the south wall. This leaves 36" x 60" of space on the north wall for either a shower or tub. The vanity would be on the west wall ( across from the door) spaced away from the tub or shower around 12". Make sure the vanity cabinet is shallow, no more than 21" deep. The vanity should be able to be about 48" wide. The toilet will go on the South wall with the right side of it close to the East wall. Code calls for approx. 33" of width for the toilet overall. If budget allows you could continue the vanity cabinets into the corner of the south wall however keep in mind that most of that area that will be next to the toilet and not easily accessible. But it would provide extra storage or counter space. The sink will have to be centered in the 48" part of the vanity. You could also frame out the southwest corner to capture the side of the vanity instead of a longer vanity. Hope this helps.

Thank you Riddle Construction and Design, it was a great help